Chap_27_sample_test[1]

Chap_27_sample_test[1] - Audesirk Biology Life on Earth 7e...

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Audesirk, Biology: Life on Earth 7e Chapter 27 Homeostasis and the Organization of the Animal Body 1) Most body systems maintain homeostasis through A) positive feedback systems. B) negative feedback systems. C) monitoring systems. D) alternating systems. Answer: B Diff: 1 Type: MC Page Ref: Sec. 27.1 Skill: Factual 2) Hypertension produces damage to the lining of the arterioles of the kidneys, which results in the release of molecules that will further raise blood pressure. This is an example of a(n) A) negative feedback loop. B) positive feedback loop. C) controlling mechanism. D) uncontrolled mechanism. Answer: B Diff: 2 Type: MC Page Ref: Sec. 27.1 Skill: Conceptual For the following question(s), refer to the description below of a feedback system. On a cold day , my body temperature begins to drop. Cells in my brain sense the cold and send a hormone called TSH to my thyroid gland which is in my throat. This signals my thyroid gland to release a hormone called thyroxine . Thyroxine causes the cells in my body to increase their metabolism (activity) which produces heat . This heat that is produced helps to bring my body temperature up. 3) The variable in my feedback system is A) body temperature. B) cells in my brain. C) cells in my body. D) TSH. Answer: A Diff: 3 Type: MC Page Ref: Sec. 27.1 Skill: Application 4) The receptor in my description is A) heat. B) thyroxine. C) cells in my brain. D) cells in my body. Answer: C Diff: 3 Type: MC Page Ref: Sec. 27.1 Skill: Application Audesirk - Chapter 27 - page 1
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5) The effector in my control system is A) cells in my body. B) cells in my brain.
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Chap_27_sample_test[1] - Audesirk Biology Life on Earth 7e...

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