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h phys spring 10--exam 2

h phys spring 10--exam 2 - Name Trask Zool 2200 Human...

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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: 3.) Which of the following best exemplifies tonic control? 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
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2 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: 8.) On average, which of the following will remain active in the circulation longer? 9.) In general, which of the following will elicit the most rapid response? 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.
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