20 Questions
Which of the following is NOT a function of the muscular system?
Transporting oxygen to the body's cells
Which muscle acts as the prime mover (agonist) in elbow flexion?
Biceps brachii
What is the role of the tibialis anterior muscle?
Dorsiflexion of the foot and ankle
Which muscle group is primarily responsible for hip extension?
Hamstrings
What is the purpose of a prosthesis?
To replace a missing body part and restore functionality
What material was used in the ancient Egyptian prostheses?
Wood and leather
Which technological advancements have revolutionized modern prosthetic technology?
3D printing and lightweight but strong materials like polypropylene plastic and carbon fiber
What falls into the category of prostheses besides artificial limbs?
Fingers, eyes, ears, and noses
What is the primary function of long bones?
Act as levers for skeletal muscles
Where does hematopoiesis occur in bones?
Red bone marrow of certain bones
Which type of bones have a large surface area and are thin and flat?
Flat bones
What is the process of bone tissue formation called?
Ossification
Which type of muscle is responsible for body movement and is under voluntary control?
Skeletal muscle
What are the two key proteins involved in muscle contraction?
Myosin and actin
Which of the following neurotransmitters is released by motor neurons at the neuromuscular junction to transmit signals that cause muscle contraction?
Acetylcholine
What role do muscles play in conjunction with bones to generate force and movement?
Form lever systems
Which type of bone is more solid and stores inorganic salts, providing bone strength?
Compact bone
What is the function of osteoblasts in the process of bone regeneration after a fracture?
They form spongy bone and replace the callus
Which bone structure covers the ends of bones in joints and helps decrease friction?
Articular cartilage
What is the primary purpose of the hematoma that forms at the site of a fracture?
To provide a framework for the fibrocartilaginous callus
Study Notes
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Osteoblasts build new bone before undergoing apoptosis (cell death)
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Fracture treatment includes reduction (realignment) and immobilization
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Hematoma forms due to hemorrhaged blood clots at the site of the break
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Fibrocartilaginous callus forms to span the break and connect the ends
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Osteoblasts form spongy bone and replace the callus
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Bone remodeling occurs
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Articular cartilage covers bone ends in joints, decreases friction
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Spongy bone is found in bone ends and joints, holds marrow and nutrient vessels
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Compact bone is more solid and stores inorganic salts, provides bone strength
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Epiphyses are bone ends that distribute pressure in joints, make RBCs
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Diaphysis is the midsection of a long bone, contains spongy and compact bone
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Periosteum is the outermost layer of bone, provides support and connection
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Endosteum lines medullary cavity, aids in bone growth
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Yellow bone marrow produces fat, red bone marrow produces blood cells
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Nutrient artery carries blood and nutrients to the bone
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Lower limb bones are thicker, designed for more weight and force
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Wrist bones (carpals) and finger bones (phalanges) are long bones
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Metacarpals anchor phalanges to the wrist
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Phalanges make up fingers and enable dexterity
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Femur calculation is used to estimate height
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Using femur length to determine height is not accurate for all ages
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Tissues of the skeletal system vary depending on slides provided
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Bone names answers will vary based on student performance
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Fracture results in callus formation and bone regeneration
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Cancer and osteoporosis can result in bone breaks
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Symptoms of a fracture include swelling, pain, bruising, and weakness
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Blood clot forms at the site of the fracture, leading to swelling
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Collagen forms a callus, which replaces the blood clot
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Osteoblasts begin bone regeneration 6-12 weeks after a fracture
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Immobilization and pain management help with fracture healing
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Fractures increase risk for fractures as bone density decreases with age
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By age 30, people begin to lose bone density
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Prevent bone loss by getting calcium, vitamin D, and exercising regularly
Test your knowledge of memory tools for the support and motion unit in anatomy. Get creative and come up with your own mnemonic devices for remembering the cervical, thoracic, lumbar, sacral, and coccyx regions.
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