Lecture 11 - Muscular system A+P2
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Questions and Answers

Which muscle is responsible for dorsiflexion and inversion of the foot?

  • Extensor Digitorum Longus
  • Fibularis (Peroneus) Brevis
  • Tibialis Anterior (correct)
  • Gastrocnemius

    • What is the action of the Flexor Hallucis Longus muscle?

  • Dorsiflexion of the big toe
  • Flexion of the knee
  • Plantar flexion of the foot (correct)
  • Eversion of the foot

    • Which muscle has an origin on the medial condyle of the tibia and proximal shaft of the tibia?

  • Fibularis (Peroneus) Longus
  • Tibialis Posterior
  • Extensor Hallucis Longus
  • Tibialis Anterior (correct)

    • What is the action of the Gastrocnemius muscle?

    <p>Plantar flexion of the foot</p> Signup and view all the answers

    Which compartment of the lower leg contains the Fibularis (Peroneus) Longus and Fibularis (Peroneus) Brevis muscles?

    <p>Lateral Compartment</p> Signup and view all the answers

    What is the insertion of the Tibialis Anterior muscle?

    <p>Base of 1st metatarsal</p> Signup and view all the answers

    What is the origin of the Long Head of the Biceps Brachii muscle?

    <p>Superior portion of the labrum</p> Signup and view all the answers

    Which muscle is the MOST POWERFUL FLEXOR of the elbow joint?

    <p>Brachialis</p> Signup and view all the answers

    What is the term used for medial epicondylitis caused by overuse of muscles on the anterior side of the forearm?

    <p>Golfer’s Elbow</p> Signup and view all the answers

    What is the origin of the Iliopsoas Muscle?

    <p>T12/L1 and iliac fossa</p> Signup and view all the answers

    What is the function of the Hamstrings?

    <p>Flexion at the knee joint and extension at the hip joint</p> Signup and view all the answers

    What is the insertion of the Quadriceps Femoris muscle?

    <p>Tibial tuberosity</p> Signup and view all the answers

    What is the function of the Adductor Magnus muscle?

    <p>Adduction at the hip joint</p> Signup and view all the answers

    What is the origin of the Triceps Brachii muscle?

    <p>Infraglenoid tubercle</p> Signup and view all the answers

    What is the term used for the injury caused by overuse of muscles on the posterior side of the forearm?

    <p>Tennis Elbow</p> Signup and view all the answers

    What is the function of the Sartorius muscle?

    <p>Weakly flexes, abducts, and laterally rotates the hip</p> Signup and view all the answers

    Which type of muscle tissue is found in the walls of hollow internal structures?

    <p>Smooth muscle tissue</p> Signup and view all the answers

    What is the characteristic of a muscle's origin?

    <p>The site that does not move during contraction</p> Signup and view all the answers

    Which muscle is an example of a prime mover at the elbow joint?

    <p>Biceps brachial</p> Signup and view all the answers

    What determines the direction of a muscle's name?

    <p>The direction of the muscle fibers to the midline</p> Signup and view all the answers

    What type of muscle tissue is both striated and involuntary?

    <p>Cardiac muscle tissue</p> Signup and view all the answers

    Which term describes the arrangement of muscles at a joint?

    <p>Antagonistic</p> Signup and view all the answers

    What is the main function of the external intercostal muscles during breathing?

    <p>To elevate the ribs during inspiration</p> Signup and view all the answers

    What is the most important muscle that powers breathing?

    <p>Diaphragm</p> Signup and view all the answers

    What is the name of the opening in the diaphragm through which the aorta passes?

    <p>Aortic hiatus</p> Signup and view all the answers

    What is the primary function of the biceps brachial muscle during elbow movement?

    <p>To contract and flex the elbow</p> Signup and view all the answers

    Which muscle is responsible for depressing the ribs?

    <p>Rectus abdominis</p> Signup and view all the answers

    What is the role of the antagonist muscle during a movement?

    <p>To stretch and then become the primary mover</p> Signup and view all the answers

    What is the name of the fibrous band that separates the right and left rectus abdominis muscles?

    <p>Linea alba</p> Signup and view all the answers

    What type of connective tissue connects muscles to bones?

    <p>Tendons</p> Signup and view all the answers

    Which muscle originates from the supraspinous fossa and inserts on the greater tubercle of the humerus?

    <p>Supraspinatus</p> Signup and view all the answers

    What is the main function of the rotator cuff muscles?

    <p>To strengthen and stabilize the shoulder</p> Signup and view all the answers

    Which muscle is responsible for lifting the chin and extending the neck?

    <p>Sternocleidomastoid</p> Signup and view all the answers

    Which muscle originates from the anterior abdominal wall and inserts on the linea alba?

    <p>Rectus abdominis</p> Signup and view all the answers

    What is the action of the trapezius muscle?

    <p>To raise the shoulders</p> Signup and view all the answers

    What is the name of the muscle that flexes the vertebral column and produces a 'six-pack' appearance?

    <p>Rectus abdominis</p> Signup and view all the answers

    Which muscle is the widest back muscle?

    <p>Latissimus Dorsi</p> Signup and view all the answers

    What is the name of the opening in the diaphragm through which the esophagus passes?

    <p>Esophageal hiatus</p> Signup and view all the answers

    What is the primary function of the erector spinae muscle?

    <p>To extend the vertebral column</p> Signup and view all the answers

    Which muscle is responsible for producing a 'winging' of the scapula?

    <p>Pectoralis Minor</p> Signup and view all the answers

    What is the origin of the latissimus dorsi muscle?

    <p>Spines T7-L5, ribs 9-12, and iliac and sacral crests</p> Signup and view all the answers

    What is the insertion of the pectoralis major muscle?

    <p>Greater tubercle of the humerus</p> Signup and view all the answers

    What is the origin of the Short Head of the Biceps Brachii muscle?

    <p>Coracoid process</p> Signup and view all the answers

    Which muscle is responsible for flexion, lateral rotation, and abduction of the hip?

    <p>Iliopsoas Muscle</p> Signup and view all the answers

    What is the insertion of the Triceps Brachii muscle?

    <p>Olecranon</p> Signup and view all the answers

    Which muscle is an example of a flexor of the hand and wrist?

    <p>Tereres</p> Signup and view all the answers

    What is the origin of the Semitendinosus muscle?

    <p>Ischial tuberosity</p> Signup and view all the answers

    Which muscle is responsible for producing a 'winging' of the scapula when paralyzed?

    <p>Serratus Anterior</p> Signup and view all the answers

    What is the insertion of the Quadriceps Femoris muscle?

    <p>Tibial tuberosity</p> Signup and view all the answers

    Which muscle is responsible for flexion of the elbow joint?

    <p>Biceps Brachii</p> Signup and view all the answers

    What is the origin of the Gluteus Maximus muscle?

    <p>Ilium</p> Signup and view all the answers

    Which muscle is an example of an extensor of the hand and wrist?

    <p>Extensor Carpi Radialis</p> Signup and view all the answers

    What is the primary function of the triceps brachial muscle during elbow movement?

    <p>Extension of the elbow</p> Signup and view all the answers

    What is the role of the antagonist muscle during a movement?

    <p>Contracts to oppose the movement</p> Signup and view all the answers

    Which type of connective tissue connects muscles to bones?

    <p>Tendons</p> Signup and view all the answers

    What is the characteristic of a muscle's origin?

    <p>The point at which the muscle attaches to the bone</p> Signup and view all the answers

    Which muscle is responsible for lifting the chin and extending the neck?

    <p>Sternocleidomastoid</p> Signup and view all the answers

    Which muscle is the widest back muscle?

    <p>Latissimus Dorsi</p> Signup and view all the answers

    What is the primary function of the erector spinae muscle?

    <p>Extension of the vertebral column</p> Signup and view all the answers

    Which muscle originates from the anterior abdominal wall and inserts on the linea alba?

    <p>Rectus Abdominis</p> Signup and view all the answers

    What is the action of the pectoralis major muscle?

    <p>Adduction of the shoulder joint</p> Signup and view all the answers

    What is the term used for the fibrous band that separates the right and left rectus abdominis muscles?

    <p>Linea Alba</p> Signup and view all the answers

    Which of the following muscles is responsible for producing dorsiflexion and inversion of the foot?

    <p>Tibialis Anterior</p> Signup and view all the answers

    Which compartment of the lower leg contains the Tibialis Anterior muscle?

    <p>Anterior Compartment of Lower Leg</p> Signup and view all the answers

    What is the function of the muscle that runs obliquely between the Gastrocnemius and Soleus muscles?

    <p>Plantar flexion of the foot</p> Signup and view all the answers

    Which muscle originates from the lateral condyle and proximal shaft of the tibia?

    <p>Tibialis Anterior</p> Signup and view all the answers

    What is the result of the contraction of the Flexor Hallucis Longus muscle?

    <p>Flexion of the big toe</p> Signup and view all the answers

    Which muscles plantar flex the foot at the ankle joint?

    <p>Posterior Compartment muscles</p> Signup and view all the answers

    What is the characteristic of a muscle's insertion?

    <p>Site that moves during the contraction</p> Signup and view all the answers

    What type of muscle tissue is both striated and voluntary?

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

    What is the term used to describe the arrangement of muscles at a joint?

    <p>Antagonistic</p> Signup and view all the answers

    What is the role of the prime mover muscle during a movement?

    <p>To cause the desired movement</p> Signup and view all the answers

    What is the characteristic of a muscle's origin and insertion?

    <p>Origin is typically more proximal and insertion is typically more distal</p> Signup and view all the answers

    What is the function of skeletal muscles in thermogenesis?

    <p>To generate heat</p> Signup and view all the answers

    What is the action of the external intercostal muscles during inspiration?

    <p>Elevate the ribs</p> Signup and view all the answers

    What is the origin of the internal oblique muscle?

    <p>Iliac crest and thoracolumbar fascia</p> Signup and view all the answers

    What is the function of the diaphragm during breathing?

    <p>It increases the dimension of the thoracic cavity</p> Signup and view all the answers

    Which muscle is responsible for flexing the vertebral column?

    <p>Rectus abdominis</p> Signup and view all the answers

    What is the name of the opening in the diaphragm through which the inferior vena cava passes?

    <p>Caval hiatus</p> Signup and view all the answers

    Which muscle originates from the xiphoid process and ribs 7-12?

    <p>Rectus abdominis</p> Signup and view all the answers

    What is the function of the transversus abdominis muscle?

    <p>It compresses the abdominal contents</p> Signup and view all the answers

    Which muscle is part of the rotator cuff?

    <p>Teres minor</p> Signup and view all the answers

    What is the action of the internal intercostal muscles during forced expiration?

    <p>They draw the ribs together</p> Signup and view all the answers

    Which muscle originates from the inferior border of the rib above and inserts on the superior border of the rib below?

    <p>External intercostal</p> Signup and view all the answers

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