h phys spring '10--exam 2--answer key

h phys spring '10--exam 2--answer key - Name: Trask Zool...

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Name: 1 Trask Zool 2200: Human Physiology Exam 2 2//19/10 Section I: Multiple Choice. Answer each of the following questions by filling in the circle on your answer key that corresponds with the BEST answer. (49 points total). 1.) A drug binds to and activates a receptor to elicit the same response as the physiologic ligand. This drug is: a.) an antagonist b.) an agonist c.) a competitive inhibitor d.) an endogenous ligand 2.) The parts of a reflex path are: 1.) efferent pathway. 2.) afferent pathway. 3.) stimulus. 4.) effector. 5.) response. 6.) integrating center. The correct order for these parts in a physiologic response loop is: a.) 3, 4, 2, 6, 1, 5. b.) 3, 2, 4, 1, 6, 5. c.) 3, 1, 4, 6, 2, 5. d.) 3, 1, 6, 2, 4, 5. e.) 3, 2, 6, 1, 4, 5. 3.) Which of the following best exemplifies tonic control? a.) The volume knob on a car radio b.) A thermostat in a fish tank c.) Regulation of blood vessel diameter d.) a. and b. e.) a. and c. f.) a., b., and c. are all examples of tonic control. g.) None of the above. 4.) When describing a positive feedback loop, it would be appropriate to say that a.) it is more common than negative feedback. b.) it requires an outside stimulus to turn it off. c.) it is associated with neuronal conduction. d.) a. and b. e.) a., b., and c.
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5.) A ‘simple’ endocrine loop: a.) is exemplified by the relationship between parathyroid hormone and circulating calcium concentrations. b.) is exemplified by the relationship between thyroid hormone and basal metabolic rate. c.) has no feedback mechanism in place. d.) Both a. and b. e.) a., b., and c. 6.) All glands secrete hormones. a.) True. b.) False. 7.) An example of a steroid hormone is: a.) testosterone. b.) epinephrine. c.) Thyroid hormone. d.) ADH. e.) Both a. and d. are steroid hormones. 8.) On average, which of the following will remain active in the circulation longer? a.) A peptide hormone b.) A steroid hormone c.) An amine hormone 9.) In general, which of the following will elicit the most rapid response? a.) A peptide hormone b.) A steroid hormone c.) An amine hormone 10.) In response to low blood calcium concentrations: a.) parathyroid hormone levels become higher. b.) levels of thyroid hormone become higher. c.) parathyroid hormone levels become lower. d.) levels of thyroid hormone become lower. e.) both parathyroid hormone and thyroid hormone levels become higher f.) both parathyroid hormone and thyroid hormone levels become lower. g.) parathyroid hormone levels become higher and thyroid hormone levels become lower. h.) parathyroid hormone levels become lower and thyroid hormone levels become higher. 11.) When stimulated by a particular hormone, there is a marked increase in the activity of G protein-coupled receptors in the membrane. The hormone is probably: a.) a steroid hormone . b.)
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This note was uploaded on 01/03/2012 for the course ZOO 2200 taught by Professor Barbcrippestrask during the Spring '11 term at Weber.

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h phys spring '10--exam 2--answer key - Name: Trask Zool...

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