Musculoskeletal System Quiz
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Questions and Answers

What is the primary role of articular cartilage within the musculoskeletal system?

  • To produce red blood cells within joint cavities.
  • To provide structural support and rigidity to bones.
  • To facilitate the attachment of muscles to bones.
  • To cushion joints and minimize friction between bones. (correct)
  • Which of the following is NOT a function of the skeletal system as described in the text?

  • Producing blood cells in the red bone marrow.
  • Protecting internal organs from physical damage.
  • Generating nerve impulses for muscle contraction. (correct)
  • Storing calcium for maintaining blood calcium levels.
  • What is the role of tendons in the musculoskeletal system?

  • To connect bones to other bones at joints.
  • To attach muscles to bones, enabling movement. (correct)
  • To transmit nerve impulses to skeletal muscles.
  • To enclose and protect individual muscles.
  • Which tissue is primarily responsible for generating body heat as a byproduct of its function?

    <p>Skeletal muscle tissue (C)</p> Signup and view all the answers

    What are osteocytes?

    <p>Mature bone cells found within the bone matrix. (A)</p> Signup and view all the answers

    What is the composition of the nonliving matrix in bone tissue?

    <p>A combination of calcium salts and collagen protein. (B)</p> Signup and view all the answers

    What is the function of fasciae in the muscular system?

    <p>To provide a protective and structural enclosure for individual muscles. (A)</p> Signup and view all the answers

    Besides movement and heat production, what is another significant function of the muscular system mentioned in the text?

    <p>Assisting in the return of blood from the legs. (C)</p> Signup and view all the answers

    Which function is NOT primarily associated with the periosteum?

    <p>Providing a surface for muscle attachment (A)</p> Signup and view all the answers

    What is the primary role of osteoclasts in bone tissue?

    <p>Resorbing bone matrix to release calcium into the blood (D)</p> Signup and view all the answers

    Which vitamin is most critical for the absorption of calcium and phosphorus in the small intestine, directly impacting bone health?

    <p>Vitamin D (A)</p> Signup and view all the answers

    Which hormone primarily promotes the retention of calcium in bones, counteracting the effects of parathyroid hormone?

    <p>Calcitonin (D)</p> Signup and view all the answers

    The axial skeleton primarily consists of bones that perform which function?

    <p>Protecting and supporting internal organs (B)</p> Signup and view all the answers

    What type of joint is characteristic of the sutures found in the skull?

    <p>Synarthrosis (B)</p> Signup and view all the answers

    Which vertebrae articulate with the ribs in the thoracic cage?

    <p>Thoracic vertebrae (A)</p> Signup and view all the answers

    What is the function of intervertebral discs located between vertebrae?

    <p>To cushion vertebrae and permit spinal column movement (D)</p> Signup and view all the answers

    What is the primary mechanism by which the thoracic cage facilitates inhalation?

    <p>Upward and outward movement of the ribs by intercostal muscles (C)</p> Signup and view all the answers

    Which type of joint is characterized by being freely movable and is exemplified by most joints in the appendicular skeleton?

    <p>Synovial joint (B)</p> Signup and view all the answers

    What is the role of bursae associated with synovial joints?

    <p>To lessen friction between joint components and overlying tissues (D)</p> Signup and view all the answers

    In skeletal muscle, what is referred to as the 'origin' of a muscle?

    <p>The more stationary attachment site of the muscle (B)</p> Signup and view all the answers

    What term describes a muscle that directly produces a desired movement?

    <p>Agonist (B)</p> Signup and view all the answers

    What is the functional role of synergist muscles in relation to agonists?

    <p>To assist the agonist in performing a specific action (A)</p> Signup and view all the answers

    Initiation of voluntary skeletal muscle contraction originates in which part of the brain?

    <p>Motor areas of the cerebral cortex (B)</p> Signup and view all the answers

    What is the primary use of myelography?

    <p>For spine surgery revisions or when MRI or CT scans are not possible (B)</p> Signup and view all the answers

    How does a nuclear bone scan function?

    <p>Through the injection of a radioisotope that accumulates in bone (D)</p> Signup and view all the answers

    What diagnostic information can an X-ray examination provide?

    <p>Alignment and density of bones (B)</p> Signup and view all the answers

    Which diagnostic technique is used for examining synovial joints?

    <p>Arthrography (D)</p> Signup and view all the answers

    What disorders can ultrasound detect according to the context provided?

    <p>Osteomyelitis and soft tissue disorders only (D)</p> Signup and view all the answers

    What could be a possible cause for red streaks that are warm to touch on a patient's arm who had shoulder arthrocentesis?

    <p>Thrombophlebitis (A)</p> Signup and view all the answers

    Which abnormal lab test finding indicates bone cancer?

    <p>Increased alkaline phosphatase (D)</p> Signup and view all the answers

    What is a common complication after arthroscopy that patients should be educated to report?

    <p>Infection symptoms: fever, warmth, and redness (B)</p> Signup and view all the answers

    A patient shows altered sensation such as tingling post-surgery. What might this indicate?

    <p>Neurovascular impairment (D)</p> Signup and view all the answers

    Which symptom should prompt immediate concern during postoperative care for an arthroscopy patient?

    <p>Leg swelling with tenderness (A)</p> Signup and view all the answers

    What is the significance of pale palms or soles in a patient after musculoskeletal surgery?

    <p>Manifestation of impaired circulation (B)</p> Signup and view all the answers

    Which abnormal finding post-arthroscopy is likely due to inflammation or infection?

    <p>Prolonged capillary refill (B)</p> Signup and view all the answers

    What would you expect to find during the assessment of a patient with compartment syndrome?

    <p>Swelling and tight, shiny skin (D)</p> Signup and view all the answers

    What is not typically a complication following bone or muscle biopsy?

    <p>Increased muscle strength (D)</p> Signup and view all the answers

    Which neurovascular check would indicate a potential complication in a post-arthroscopy patient?

    <p>Pallor and cold extremities (B)</p> Signup and view all the answers

    When should a patient report increased joint pain after arthroscopy?

    <p>If the pain increases and is not relieved by medication (A)</p> Signup and view all the answers

    Which condition is associated with an increase in serum myoglobin levels?

    <p>Skeletal muscle destruction (C)</p> Signup and view all the answers

    What laboratory test can be indicative of Paget disease when elevated?

    <p>Alkaline phosphatase (D)</p> Signup and view all the answers

    Which of the following would not be a symptom of infection in a postoperative musculoskeletal patient?

    <p>Unusual coolness of the affected limb (A)</p> Signup and view all the answers

    What typically guides the treatment plan in the case of a skeletal abnormality?

    <p>X-rays (D)</p> Signup and view all the answers

    What is the main function of the cerebellum in the human body?

    <p>Coordinating voluntary movement (D)</p> Signup and view all the answers

    Which type of joint allows for movement in several planes and is found in the thumb?

    <p>Saddle (D)</p> Signup and view all the answers

    What neurotransmitter is released at the neuromuscular junction to stimulate muscle contraction?

    <p>Acetylcholine (A)</p> Signup and view all the answers

    Which of the following factors contributes significantly to the loss of calcium in bones with age?

    <p>Loss of estrogen post-menopause (D)</p> Signup and view all the answers

    Which aspect of musculoskeletal data collection includes assessing posture and gait?

    <p>Physical examination inspection (A)</p> Signup and view all the answers

    What happens when acetylcholine diffuses across the synaptic cleft at the neuromuscular junction?

    <p>It stimulates sarcolemma receptors (D)</p> Signup and view all the answers

    What is the effect of weight-bearing exercise on bone health in post-menopausal women?

    <p>It stimulates bone matrix deposition (D)</p> Signup and view all the answers

    How does aging affect muscle strength and what can mitigate this effect?

    <p>Regular exercise maintains muscle strength (B)</p> Signup and view all the answers

    When a muscle has increased work to do, how does it respond?

    <p>By contracting more muscle fibers (C)</p> Signup and view all the answers

    Which type of joints are common between the vertebrae?

    <p>Symphysis (D)</p> Signup and view all the answers

    What role does calcium play in muscle contraction at the molecular level?

    <p>It exposes attachment points on actin filaments (A)</p> Signup and view all the answers

    What is the significance of bilateral muscle strength evaluation in musculoskeletal examination?

    <p>It checks for muscle strength and equality (B)</p> Signup and view all the answers

    Which joint type allows rotation and is located in the neck?

    <p>Pivot (A)</p> Signup and view all the answers

    What is the role of the T tubules in muscle contraction?

    <p>To conduct impulses to the sarcoplasmic reticulum (D)</p> Signup and view all the answers

    How is the psychological aspect of musculoskeletal disorders addressed in patient care?

    <p>Through consultation with social work and support groups (C)</p> Signup and view all the answers

    What is a common cause of increased alkaline phosphatase (ALP) levels in the blood?

    <p>Bone damage (B)</p> Signup and view all the answers

    How are calcium and phosphorus levels in the blood related?

    <p>They have an inverse relationship. (A)</p> Signup and view all the answers

    Which enzyme is indicative of muscle injury when found elevated in the bloodstream?

    <p>Lactate dehydrogenase (LDH) (A)</p> Signup and view all the answers

    What condition is characterized by dangerous levels of muscle destruction?

    <p>Rhabdomyolysis (C)</p> Signup and view all the answers

    What is the purpose of an arthrocentesis procedure?

    <p>To aspirate synovial fluid from a joint (A)</p> Signup and view all the answers

    In which scenario would a high myoglobin level likely be found?

    <p>Immediately following skeletal muscle injury (C)</p> Signup and view all the answers

    Which diagnostic marker is monitored in cases of rhabdomyolysis?

    <p>Creatine kinase (CK) (C)</p> Signup and view all the answers

    Which condition can result from elevated serum uric acid levels?

    <p>Gout (D)</p> Signup and view all the answers

    For what reason might a health professional administer antibiotics during arthrocentesis?

    <p>To reduce risk of infection (D)</p> Signup and view all the answers

    What factor increases the risk of vitamin D deficiency?

    <p>Geographic location with limited sunlight exposure (A)</p> Signup and view all the answers

    How does the enzyme creatine kinase indicate muscle damage?

    <p>It increases significantly in muscle damage. (A)</p> Signup and view all the answers

    Which symptom is NOT typically associated with rhabdomyolysis?

    <p>Increased urination (A)</p> Signup and view all the answers

    What data is important to collect from musculoskeletal patients to prevent allergies?

    <p>Allergy history (A)</p> Signup and view all the answers

    Which indicator suggests muscle enzyme release following trauma?

    <p>Increased skeletal muscle creatine kinase (CK-MM) (B)</p> Signup and view all the answers

    What can a localized buildup of synovial fluid in a joint indicate?

    <p>Non-inflammatory conditions (B)</p> Signup and view all the answers

    What does a 'hot spot' on a bone scan indicate?

    <p>Bone disease (C)</p> Signup and view all the answers

    Which imaging technique uses sound waves to detect osteomyelitis?

    <p>Ultrasonography (D)</p> Signup and view all the answers

    Which of the following tests involves injecting a contrast medium into a synovial joint?

    <p>Arthrogram (C)</p> Signup and view all the answers

    Mrs. Gardenio requires morphine delivered intramuscularly at a dose of 4 mg. If the available morphine concentration is 5 mg/mL, how many milliliters should be administered?

    <p>0.8 mL (D)</p> Signup and view all the answers

    After Mrs. Gardenio's hip surgery, which team member is NOT typically part of the post-operative care team?

    <p>Obstetrician (B)</p> Signup and view all the answers

    What common follow-up advice should be given to patients after an arthrogram?

    <p>Elevate the limb and use ice to reduce swelling (A)</p> Signup and view all the answers

    Which tissue type is NOT directly part of the skeletal system structure?

    <p>Muscle tissue (A)</p> Signup and view all the answers

    What factor contributes to the decline in muscle strength as people age?

    <p>Decreased protein synthesis (B)</p> Signup and view all the answers

    What is the primary function of the cerebellum related to movement?

    <p>Coordination of voluntary movement (A)</p> Signup and view all the answers

    What is the purpose of removing synovial fluid during an arthrocentesis?

    <p>To reduce swelling in the joint (A)</p> Signup and view all the answers

    Which diagnostic method is primarily used to assess bone density?

    <p>Bone density scan (C)</p> Signup and view all the answers

    After how many years do weight-bearing joints most commonly experience damage?

    <p>Many years (D)</p> Signup and view all the answers

    What should be monitored closely if a home health nurse identifies a patient as at risk for falls?

    <p>Patient's standing balance (B)</p> Signup and view all the answers

    What is NOT typically observed during a musculoskeletal data collection?

    <p>Tendon reflexes (A)</p> Signup and view all the answers

    Which laboratory test is performed to diagnose musculoskeletal disorders?

    <p>Myoglobin (B)</p> Signup and view all the answers

    Which diagnostic method uses electromagnets for visualization?

    <p>Magnetic Resonance Imaging (MRI) (C)</p> Signup and view all the answers

    What is a common indication for using myelography?

    <p>Patients unable to have a CT scan or MRI (B)</p> Signup and view all the answers

    What is the primary purpose of a bone density scan?

    <p>Measure bone strength (C)</p> Signup and view all the answers

    What should be monitored after an invasive arthrography procedure?

    <p>Joint swelling (A)</p> Signup and view all the answers

    Which of the following is crucial to verify before performing a nuclear medicine scan?

    <p>Removal of jewelry (D)</p> Signup and view all the answers

    Which imaging method requires patients to avoid lotions before the procedure?

    <p>Electromyography (EMG) (D)</p> Signup and view all the answers

    In arthrocentesis, what might be analyzed from the withdrawn synovial fluid?

    <p>Infection indicators (B)</p> Signup and view all the answers

    What is the function of gallium in gallium/thallium scans?

    <p>Concentrate in tumor areas (C)</p> Signup and view all the answers

    What is not an effect of a positive electromyography (EMG) result?

    <p>Determining bone structure (B)</p> Signup and view all the answers

    What is the role of ultrasound in diagnostic imaging?

    <p>Visualize bone and soft tissue (B)</p> Signup and view all the answers

    What is an arthroscopy primarily used for?

    <p>Direct visualization of a joint (B)</p> Signup and view all the answers

    What is checked before an MRI regarding patient implants?

    <p>MRI safety designation (D)</p> Signup and view all the answers

    Which substance is injected in nuclear medicine scans?

    <p>Radioisotope (A)</p> Signup and view all the answers

    How is joint abnormality diagnosed in invasive arthrography?

    <p>X-ray with air or contrast medium (D)</p> Signup and view all the answers

    What should be done immediately after a myelogram?

    <p>Monitor for headache and nausea (B)</p> Signup and view all the answers

    Flashcards

    Musculoskeletal System

    The system formed by the skeletal and muscular systems to enable body movement.

    Skeleton

    The framework of the body that supports and protects organs.

    Muscle Contraction

    The process where muscles shorten to change the angle of a joint.

    Nerve Impulses

    Electrochemical signals required for voluntary muscles to contract.

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    Bone Tissue

    Tissue composed of osteocytes in a matrix of calcium salts and collagen.

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    Osteons

    The dense structural arrangements of osteocytes in compact bone.

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    Red Bone Marrow

    Hematopoietic tissue found in flat and irregular bones, responsible for blood formation.

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    Calcium Homeostasis

    The balance of calcium levels in the blood, crucial for various bodily functions.

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    Compact Bone

    Forms the diaphyses and covers spongy bone in long bones.

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    Periosteum

    Connective tissue covering all outer surfaces of bones except at joints.

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    Osteoblast

    Cells that produce bone matrix during growth and repair.

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    Osteoclast

    Cells that resorb bone matrix when calcium is needed in the blood.

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    Vitamin D

    Essential for the absorption of calcium and phosphorus in the intestine.

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    Growth Hormone (GH)

    Hormone that increases mitosis and protein synthesis for growth.

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    Axial Skeleton

    Includes flat or irregular bones plus the vertebral column.

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    Appendicular Skeleton

    Consists of limbs and their attachments to the axial skeleton.

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    Vertebral Column

    Made of 33 vertebrae, protects the spinal cord.

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    Thoracic Cage

    Protects the heart and lungs; consists of ribs and sternum.

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    Synovial Joints

    Freely movable joints characterized by synovial fluid.

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    Agonist Muscle

    The muscle that causes a specific movement when it contracts.

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    Antagonist Muscle

    Muscle that opposes the action of the agonist.

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    Motor Nerves

    Nerve endings that innervate skeletal muscles for contraction.

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    Tendons

    Fibrous connective tissues that attach muscles to bones.

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    Cerebellum

    Part of the brain that coordinates voluntary movements.

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    Muscle Tone

    State of slight contraction in muscles, essential for posture.

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    Neuromuscular Junction

    Synapse where a motor neuron connects with a muscle fiber.

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    Acetylcholine (ACh)

    Neurotransmitter released at the neuromuscular junction to trigger muscle contraction.

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    Sarcoplasmic Reticulum

    Organelle that releases calcium ions during muscle contraction.

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    Calcium's Role in Muscles

    Calcium binds to troponin, allowing muscle contraction to occur.

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    Articular Cartilage

    Smooth tissue covering the ends of bones in joints.

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    Osteoporosis

    Condition where bones lose density and strength, often due to age.

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    Weight-Bearing Exercise

    Physical activities that promote bone density by supporting body weight.

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    Range of Motion (ROM)

    The degree of movement possible at a joint.

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    Crepitation

    Grating sound heard as joints or bones move, indicating possible issues.

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    Muscle Strength Assessment

    Checking the power and balance of muscle contractions.

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    Inspection in Physical Exam

    Visual examination of posture, gait, and abnormalities in the musculoskeletal system.

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    Troponin

    Protein on the actin filament that interacts with calcium during muscle contraction.

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    Support Systems

    Networks that provide emotional and social assistance to patients.

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    Myelography

    A diagnostic imaging procedure for spine surgery candidates who can't have MRI or CT scans.

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    Electromyography

    Measures a muscle's electrical impulses to diagnose nerve or muscle damage.

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    Nuclear Bone Scan

    A scan using a radioisotope to visualize the entire skeleton.

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    Arthrogram

    An x-ray examination of a synovial joint using contrast medium.

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    Ultrasound in Orthopedics

    Detects bone infections, soft tissue disorders, and joint injuries.

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    Sedatives

    Medications used to calm or induce sleep before procedures.

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    Analgesics

    Drugs that relieve pain during or after procedures.

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    Hot spots

    Areas on tests indicating increased circulation in abnormal bone.

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    Radiographs

    Imaging technique using X-rays to view bones and soft tissues.

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    Ultrasonography

    Use of sound waves to detect muscle and joint issues.

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    Osteomyelitis

    Infection of the bone, often detected by ultrasonography.

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    Femoral neck fracture

    A common type of hip fracture, especially in older adults.

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    Morphine

    A potent analgesic used for severe pain relief.

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    Pulse palpation

    Feeling for a pulse to assess blood circulation.

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    Arthrocentesis

    Procedure to aspirate fluid from a joint space.

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    Bone density scan

    A test measuring the density of bones to assess strength.

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    CT scan

    Imaging technique that creates detailed images of bones and joints.

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    MRI

    Magnetic Resonance Imaging used for detailed soft tissue assessment.

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    Home health criteria

    Conditions for Medicare patients to be considered homebound.

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    Signs of infection after surgery

    Symptoms indicating possible infection: redness, warmth, swelling.

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    Arthroscopy

    A surgical procedure using a scope to examine a joint.

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    Neurovascular Checks

    Monitoring movement, pain, sensation, and circulation of a limb.

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    Capillary refill time

    Time taken for color to return to a nailbed after pressure.

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    Elevated alkaline phosphatase

    High levels indicate possible bone disease or new bone formation.

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    Creatine kinase increase

    Elevated levels indicate cellular damage or muscle injury.

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    Normal calcium levels

    Total calcium levels should be between 8.4-10.2 mg/dL.

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    Signs of compartment syndrome

    Symptoms include pain, numbness, and swelling leading to muscle and nerve damage.

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    Post-operative activity restrictions

    Limiting movement after surgery to prevent complications.

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    Bone or muscle biopsy

    Procedure to extract tissue for examination to check for diseases like cancer.

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    Neuromuscular symptoms

    Alterations in movement, sensation, or pain indicating possible damage.

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    X-ray

    Noninvasive imaging to view skeletal abnormalities.

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    Physical therapy after surgery

    A treatment to regain strength and movement post-operatively.

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    Symptoms of thrombophlebitis

    Signs include warmth, redness, and swelling in limbs.

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    NPO before tests

    Nothing by mouth for 4 hours prior to certain procedures.

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    Contrast medium allergy

    Reactions to iodine-based contrast dye differ from shellfish allergies.

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    MRI function

    Uses electromagnets to visualize bones, joints, and soft tissue irregularities.

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    Electromyography (EMG)

    Tests electrical activity of muscles and nerves to diagnose issues.

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    Invasive arthrography

    Injects air or contrast medium into a joint for x-ray imaging.

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    Myelogram

    Visualizes the spine using a contrast medium for spinal issues.

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    Nuclear medicine scans

    Involves radioisotope injection to visualize bone and soft tissues.

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    Bone Density Scan (DEXA)

    Measures bone strength, used for diagnosing osteoporosis.

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    Computed Tomography (CT) scan

    Imaging method for diagnosing joint or spinal column problems.

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    Gallium/thallium scans

    Radioactive elements injected to identify tumors and infections.

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    Post-procedural care

    Actions taken after medical tests to ensure patient safety.

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    Synovitis

    Inflammation of the synovial membrane in a joint.

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    Alkaline Phosphatase (ALP)

    An enzyme that increases with bone damage or disease.

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    Inverse Relationship

    When one variable increases, the other decreases.

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    Myoglobin

    A protein in muscle that indicates muscle damage when elevated.

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    Rhabdomyolysis

    Muscle breakdown that can lead to kidney failure.

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    Gout

    A condition caused by high uric acid levels leading to joint pain.

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    Muscle Enzymes

    Enzymes released into the bloodstream when muscle tissue is damaged.

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    Calcium and Phosphorus Levels

    The balance of these minerals affects bone health and disorders.

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    Clinical Judgment in Data Collection

    Focused data collection based on patient conditions.

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    Subjective Data

    Information reported by the patient about their condition.

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    Objective Data

    Observable and measurable health data collected by health professionals.

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    Health History Questions

    Questions asked to gather significant patient medical background.

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    Fluid and Electrolyte Balance

    Crucial for recovery in muscle injury cases.

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    Fractured Hip Care

    Focus on comfort and careful data collection in elderly patients.

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    Study Notes

    Musculoskeletal System Overview

    • The skeletal and muscular systems work together to move the body.
    • Bones form a framework for muscles to attach to and move joints.
    • Movement relies on the nervous, cardiovascular, and respiratory systems for nerve impulses, blood supply, and oxygen.

    Musculoskeletal System Tissues

    • Skeletal system tissues: bone, articular cartilage (cushions joints, reduces friction), and fibrous connective tissue (ligaments).
    • Muscular system tissues: skeletal muscle tissue and fibrous connective tissue (tendons, fasciae).

    Skeletal System Functions Beyond Movement

    • Protection of internal organs: skull (brain), thoracic cage (heart & lungs).
    • Blood cell production in red bone marrow (flat and irregular bones, ends of long bones).
    • Calcium storage and resorption for blood calcium homeostasis.

    Muscular System Functions

    • Movement and stabilization of the skeleton and heat production.
    • Maintaining normal body temperature via voluntary muscles.
    • Contribution to venous return in the legs through muscle compression.

    Bone Tissue and Growth

    • Bone tissue: osteocytes in a matrix of calcium salts and collagen.
    • Compact bone: densely structured osteons.
    • Spongy bone: irregularly structured, sponge-like.
    • Periosteum: connective tissue covering, crucial for protection, growth, repair, and blood supply.
    • Osteoblasts build bone, osteoclasts resorb bone.
    • Bone growth factors: nutrition (calcium, phosphorus, protein), hormones (growth hormone, thyroxine, insulin), and vitamins (D, A, C) are all essential.
    • Bone remodeling: constant removal and replacement of calcium and phosphate to maintain blood levels.
    • Parathyroid hormone increases calcium release from bones; calcitonin decreases calcium release.

    Structure of the Skeleton

    • Adult skeleton: 206 bones, axial (central), and appendicular (limbs) divisions.
    • Axial bones: flat/irregular, contain red bone marrow.
    • Appendicular bones: mainly long, with a shaft (diaphysis) and ends (epiphyses).
    • Skull: cranial (8) and facial (14) bones, sutures.
    • Vertebral column: 33 vertebrae, supports trunk & head, protects spinal cord; intervertebral discs cushion and permit movement.
    • Thoracic cage (ribs & sternum): protects heart, lungs, and upper abdominal organs.
    • Synovial joints: freely movable, characterized by a joint capsule and synovial fluid, with bursae (fluid sacs) in many joints.

    Muscle Structure and Arrangement

    • Muscle structure: thousands of skeletal muscle cells (fibers), with motor nerve endings.
    • Muscle contraction: shortening of fibers to move attached bones.
    • Muscle attachments: origin (stationary) and insertion (movable).
    • Agonist, antagonists, and synergists: muscle interactions for movement, balance, and control.

    Nervous System Role

    • Skeletal muscles are voluntary, controlled by nerve impulses from motor areas of the frontal lobes.
    • Cerebellum coordinates voluntary movements.
    • CNS regulates involuntary muscle tone (maintains posture, coordination).

    Neuromuscular Junction

    • Neuromuscular junction: synapse between motor neuron and muscle fiber.
    • Acetylcholine (ACh) neurotransmitter triggers muscle contraction.

    Aging and Musculoskeletal System

    • Calcium levels in bones decrease, especially in postmenopausal women.
    • Bone matrix loss from estrogen & testosterone decreases
    • Wear and tear: cartilage wear from aging and activities, muscle strength decline due to protein synthesis.

    Musculoskeletal System Data Collection

    • Health history: includes demographics, occupation & geographic location, prior history (allergies, medical issues), activities, risk factors, nutrition & family history.
    • Subjective: pain level, treatment & impact on daily life.
    • Psychosocial: impact on body image and self-esteem, coping strategies & support.
    • Objective: inspection, (posture, gait, deformities, joint & muscle observation), range of motion (ROM), muscle tone and palpation, and presence of any abnormalities.

    Diagnostic Tests

    • Laboratory tests: alkaline phosphatase, calcium, phosphorus, muscle enzymes, myoglobin, uric acid.
    • Diagnostic imaging: X-rays, CT scans, MRIs, arthrography, ultrasonography.
    • Invasive procedures: arthrocentesis, arthroscopy, nerve conduction studies, myelography, bone or muscle biopsy, bone density scan.

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    Description

    Test your knowledge on the functions and components of the musculoskeletal system. This quiz covers topics from articular cartilage to the roles of various tissues and hormones involved in bone health. Ideal for students studying anatomy and physiology.

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