Supraspinatus 50 3 all members of the rotator cuff

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Unformatted text preview: rcolemma into the muscle cell. 0% F. Breakdown of ACh by AChase. 0% G. Opening of the voltage-gated sodium channels. 0% H. Opening of potassium channels. 0% I. The troponin-tropomyosin complex shifts, exposing the active sites on actin. 100% J. Uptake of ATP by the myosin heads. 0% K. Attachment of actin-myosin crossbridges and swiveling of the myosin heads. 0% Score: 47. 1/1 Stimulus-Contraction 9 What is the first thing that happens when an impulse reaches the axon terminus of a neuromuscular junction? Correct Answer Student Response A Calcium ions enter the axon . Value 100% B. Calcium ions enter the sarcoplasm from the sarcoplasmic reticulum. 0% C. Acetylcholine is released into the synaptic cleft by exocytosis. 0% D. Acetylcholine binds to post-synaptic receptors on the sarcolemma. 0% E. Na+ moves across the sarcolemma into the muscle cell. 0% F. Opening of the chemically-gated sodium channels. 0% G. Opening of the voltage-gated sodium channels. 0% H. Opening of potassium channels. 0% I. Binding of calcium ions to Troponin C. 0% J. Uptake of ATP by the myosin heads. 0% K. Attachment of actin-myosin crossbridges and swiveling of the myosin heads. 0% Score: 48. Correct Answer 1/1 Stimulus-Contraction 4 As soon as Ca++ ions are released into the sarcoplasm: Student Response Value A. Calcium ions enter the axon 0% B. Calcium ions are pumped back into the sarcoplasmic reticulum. 0% C. Acetylcholine is released into the synaptic cleft by exocytosis. 0% D. Acetylcholine binds to post-synaptic receptors on the sarcolemma. 0% E. Na+ moves across the sarcolemma into the muscle cell. 0% F. Opening of the chemically-gated sodium channels. 0% G. Opening of the voltage-gated sodium channels. 0% H. Opening of potassium channels. 0% I. Binding of calcium ions to Troponin C. 100% J. Uptake of ATP by the myosin heads. 0% K. Attachment of actin-myosin crossbridges and swiveling of the myosin heads. 0% Score: 49. Correct Answer 1/1 summation A1 The diagram shows: Student Response Value 1. quantal summation 100% Correct Answer Student Response Value 2. frequency summation 0% 3. tetany 0% 4. treppe 0% Score: 50. Correct Answer 1/1 summation B2 The diagram shows: Student Response Value 1. increasing numbers of cells or motor units contracting with each increasing stimulus. 0% 2. increased contraction of cells or motor units when they are stimulated before they relax from 100% a previous stimulus. 3. a warmup of muscle fibers when first stimulated after a period of rest. Score: 1/1 Jump to Navigation Frame Your location: Assessments › View Attempt 1 of 2 Title: Quiz #1 Intro-Histology-Integument Started: February 10, 2008 10:56 PM Submitted: February 10, 2008 11:18 PM Time spent: View All Submissions › 00:22:13 Total score: 7.5/10 = 75% Total score adjusted by 0.0 Maximum possible score: 10 1. Which of the following secretes pheromones? Student Response A. eccrine sweat glands B apocrine sweat glands . Value 0% 100% C. sebaceous glands 0% D. Answers 1 and 3 0% E. both answers 2 and 3 0% Sco...
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