0 score 0 066066 12 curare acts as a muscle relaxant

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Unformatted text preview: myosin heads. 0.66/0.66 0% What event causes depolarization of the sarcolemma at the neuromuscular junction? Student Response Value A. B. C. D. E. Calcium ions enter the axon Calcium ions enter the sarcoplasm from the sarcoplasmic reticulum. Acetylcholine is released into the synaptic cleft by exocytosis. Acetylcholine binds to post-synaptic receptors on the sarcolemma. Na+ moves across the sarcolemma out of the muscle cell. F. Opening of the chemically-gated sodium channels. G. H. I. J. K. 0% 0% 0% 0% 0% 100% Opening of the voltage-gated sodium channels. Opening of potassium channels. Binding of calcium ions to Troponin C. Uptake of ATP by the myosin heads. Attachment of actin-myosin crossbridges and swiveling of the myosin heads. Score: 0% 0% 0% 0% 0% 0.66/0.66 15. Which of the following binds calcium ions: Student Response Value 50% 50% 0% 0% A. B. C. D. sarcoplasmic reticulum troponin C myosin all of the above E. 1 and 2, but not 3 Score: 100% 0.66/0.66 1 Match the muscle with its description. serratus anterior Instrumental in shrugging the shoulder. rhomboid major and minor Retracts and fixates the scapula if the head is fixed. infraspinatus Adducts and fixates the scapula. levator scapulae The only muscle of the group which does not move the scapula. trapezius protracts the scapula, as in throwing a punch. Statement serratus anterior rhomboid major and minor infraspinatus levator scapulae trapezius Score: Response protracts the scapula, as in throwing a punch. Adducts and fixates the scapula. The only muscle of the group which does not move the scapula. Instrumental in shrugging the shoulder. Retracts and fixates the scapula if the head is fixed. 2/2 2. Match the muscles with their descriptions. Value 20.0% 20.0% 20.0% 20.0% 20.0% sternocleidomastoid Acting bilaterally with its pair it extends the head and neck. splenius capitus The upper portion of this muscle extends the head only if the scapula is fixed. scalenes Acting bilaterally with its pair it protracts and flexes the head. trapezius Elevates the ribcage in forced inspiration if head is fixed. temporalis Elevates the mandible to close the jaw. Statement sternocleidomastoid splenius capitus scalenes trapezius temporalis Score: Response The upper portion of this muscle extends the head only if the scapula is fixed. Acting bilaterally with its pair it extends the head and neck. Elevates the ribcage in forced inspiration if head is fixed. The upper portion of this muscle extends the head only if the scapula is fixed. Elevates the mandible to close the jaw. Value 0.0% 20.0% 20.0% 20.0% 20.0% 1.6/2 3 Match the muscles with their descriptions. pectoralis major A rotator cuff muslce which also abducts the humerus. latisimus dorsi The primary abductor of the shoulder joint. teres minor Adducts and laterally rotates the humerus. supraspinatus A back muscle which adducts and medially rotates the humerus. deltoid The primary adductor of the humerus. Statement pectoralis major latisimus dorsi teres minor supraspinatus deltoid Sc...
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