Quiz 3 S09-key

Quiz 3 S09-key - BMED 3100: Systems Physiology Test 3,...

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BMED 3100: Systems Physiology Test 3, February 23, 2009 1 Honor Pledge All students are required, when requested, to attach the following statement to any material turned in for a grade in any course at Georgia Institute of Technology: On my honor, I pledge that I have neither given nor received inappropriate aid in the preparation of this assignment. _________ KEY ____________________ Signature __________________________________ Name (Printed) Be brief in your answers. Write clearly. Backs of pages will not be graded. Last Name
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Test 3, February 23, 2009 2 Multiple Choice: Write the best answer on the line to the right. (2 pts each) 1. The receptor potential ____ E ______ A. is an action potential. B. may trigger action potentials. C. varies in magnitude with stimulus strength. D. Both A and C are correct. E. Both B and C are correct. 2. One reason you can distinguish between a needle prick on the foot and an ice cube on the wrist is that _____ C ______ A. the ice cube stimulates a different class of receptors than the needle prick, even though both signals go to exactly the same location in the brain. B. the nerve impulse from the needle prick is inherently different from the impulse generated by the ice cube. C. the region of the brain to which one receptor pathway leads is different from the region to which the other pathway leads. D. the needle prick generates a stronger action potential in any one neuron than an ice cube does. 3. Lateral inhibition in the somatic sensory system serves to _____ B ____ A. reduce the intensity of nerve signals sent to the somatosensory cortex. B. enhance the precision of locating a stimulus by increasing the contrast between wanted and unwanted information. C. alter pain sensation by simultaneously activating other sensory systems. D. Both A and B are correct. E. Both B and C are correct. 4. Which of the following statements regarding sensory pathways is correct? ____ A ______ A. All somatic sensory information that reaches the cerebral cortex is first processed in the thalamus. B. Somatic sensory information from the left side of the body is projected to the left side of the somatosensory cortex. C. All somatic sensory information travels together in a single tract in the spinal cord. D. Stimulation of any neuron in a specific ascending pathway will convey information about only one stimulus type. E. None of the choices are correct. 5. Which of the following symptoms would a patient with a lesion (injury) _____ D _____ on the right side of the spinal cord in the region of the neck be most likely to experience? A. Loss of both pressure sense and pain in the right foot. B. Loss of both pressure sense and pain in the left foot. C.
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This note was uploaded on 01/12/2012 for the course BMED 3110 taught by Professor Staff during the Spring '08 term at Georgia Tech.

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Quiz 3 S09-key - BMED 3100: Systems Physiology Test 3,...

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