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Quiz 3 & 4
A & P
| Question | Answer |
|---|---|
| Which of the following is a function of muscle tissue? | C) controlling flow of materials out of the stomach and urinary bladder |
| The ability to respond to stimuli by producing action potentials | D) A and B are correct |
| The outermost extension of deep connective tissue that surrounds a muscle is the | B) epimysium |
| Which of the following is NOT true? | A) Several nerves accompany each artery that penetrates a muscle cell |
| The sarcoplasmic reticulum of muscle tissue | A) stores Ca2+ ions required for muscle contraction |
| Muscular atrophy | C) is a decrease in muscle mass due to loss of myofibrils. |
| Which of the following accurately describes the filaments of skeletal muscle tissue? | E) Thick and thin filaments overlap each other within the A band of the sarcomere |
| Myofibrils | B) include the contractile proteins actin and myosin |
| Thick filaments | A) are composed primarily of myosin |
| Thin filaments | D) are composed of actin, troponin and tropomyosin |
| Which of the following does NOT happen during a muscle contraction? | E) The thick and thin filaments shorten |
| A contraction cycle | D) A and B are correct. |
| Repetition of the contraction cycle | B) requires the presence of an adequate number of Ca2+ ions |
| Under which condition can muscle fibers generate the most tension? | E) when fibers have an overlap of thick and thin filaments that is close to their resting length |
| A neuromuscular junction (NMJ) | A) is the synapse of a motor neuron with a muscle fiber |
| Place the events at the neuromuscular junction (NMJ) in the order: 1. release of 2. activation 3. termination 4. arrival of an action potential 5. diffusion of ACh across synaptic cleft 6. opening of Na+ channels 7. production of muscle | E) 4, 1, 5, 2, 6, 7, 3 |
| How do muscle fibers produce ATP? | E) A, B and C are correct |
| Anaerobic cellular respiration | D) A and B are correct |
| Each of the following contributes to muscle fatigue EXCEPT | B) presence of adequate amounts of O2 in the mitochondria |
| Which of the following is true of a twitch contraction? | A) During a twitch, all fibers in a motor unit respond to an action potential in a motor neuron |
| Wave summation in a muscle fiber | E) A, B and C are correct. |
| Muscle tone | D) results from involuntary contractions of alternating small groups of motor units |
| Cardiac muscle tissue | E) All of the above are correct |
| The Sarcoplasm | B) Is enriched with glycogen |
| Which of the following is TRUE? | E) All are correct |
| All of the following are muscles that move the mandible EXCEPT the: | D) Buccinator |
| A Prime Mover (agonist) | A) Is the muscle most responsible for a particular action |
| Which muscle of facial exression is the prime mover for smiling? | D) Zygomaticus Major |
| Which of the following is true? | A) The origin of a muscle on a limb is usually proximal to its insertion |
| Which of the following contributes to the pelvic floor? | E) A, B, and C are correct |
| Which of the following penetrates the diaphragm? | D) A and B are correct |
| Each of the following is a posterior muscle that moves the pectoral girdle EXCEPT the: | C) Serratus Anterior |
| Which of the following elevates the scapula? | E) A, B, and C are correct |
| All of the following contribute to the rotator cuff EXCEPT the? | C) Teres Major |
| Which muscle is the primary abductor of the arm? | A) Deltoid |
| Which of the following flex the forearm at the elbow? | D) A and B are correct |
| Lower limb muscles function in: | E) A, B, and C are correct |
| Which muscle extends the thigh at the hip joint and laterally rotates the thigh? | A) Gluteus Maximus |
| Which of the following muscle is NOT part of the quadriceps femoris? | A) Biceps Femoris |
| Which muscle does NOT flex the thigh? | A) Quadratus Femoris |
| The calcaneal (achilles) tendon is formed by the fusion of the the tendons of the: | E) A, B, and C are correct |
| The gastrocnemius | A) Is the prominent, superficial muscle of the calf |
| The general activities of the hand depend on the functions of intrinsic hand muscles and include: | E) All of the above are correct |
| Which motions are NOT observed for the scapula? | A) flexion and extention |
| The muscle that serves as a landmark for dividing the neck into anterior and posterior triangles is the: | D) Sternocleidomastoid |
| Which is NOT true of the muscles of the perineum? | B) They are found in a single layer |
| Which is true about compartment syndrome? | E) all of the above are correct |
| Which of the following muscles is involved in his surprised expression? | B) Occupitalfrontalis |
| The bulge is, in part, due to the contraction of: | C) Biceps brachii |
| The ability of a muscle tissue to stretch without being damaged is called | C) extensibility |
Created by:
AnatomynPhys
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