Test_09_Qs - Test 9 Test_9 1. Which muscles are innervated...

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Test 9 Page 1 of 2 Test_9 1. Which muscles are innervated by the motor neurons, situated in the cervical enlargement of the spinal cord? Choose the correct option. A) Arm muscles B) Thorax C) Leg muscles D) Head and neck 2. Which is the first step in the contraction phase of the excitation-contraction coupling? Choose the correct option. A) Action potential occurs at the neuromuscular junction B) Ca2+ binds to troponin C) Nicotinic receptor channels in the sarcolemma open D) Myosin heads pivot 3. What type of motor neurons ensures that the spindle continues to provide information about muscle length during muscle contraction? Choose the correct option. A) Upper motor neurons B) Spinal interneurons C) Gamma motor neurons D) Alpha motor neurons 4. Name two ways in which the CNS grades muscle contraction ______ _________ ____________ and ___________ ___________ ________. 5. In the hierarchy of motor control, w hich of the following is a function at the lowest level of control? Choose the correct option.
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This test prep was uploaded on 04/15/2008 for the course CBNS 106 taught by Professor Korzus during the Winter '08 term at UC Riverside.

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Test_09_Qs - Test 9 Test_9 1. Which muscles are innervated...

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