Internal Regulation

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Question 1
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 Homeostasis refers to temperature regulation and other biological processes that keep body variables within a fixed range.

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Question 2
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 Patti has a fever. This is caused by a change in the set point for her body temperature.

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Question 3
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 The physiological changes that defend body temperature depend on areas in and near the hypothalamus.

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Question 4
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 Vasopressin increases blood pressure by constricting the blood vessels.

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Question 5
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 Hal is experiencing osmotic thirst. He should drink pure water.

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Question 6
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 Angiotensin II acts on the kidney to retain more sodium.

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Question 7
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 After eating, Shawanda's small intestine absorbs excess water and minerals.

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Question 8
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 Most mammals at about the age of weaning lose the intestinal enzyme lactase.

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Question 9
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 Stomach distension is necessary to produce satiety.

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Question 10
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 CCK limits meal size.

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Question 11
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 Obese people tend to produce more insulin than people of normal weight.

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Question 12
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 The paraventricular nucleus normally inhibits meal size.

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Question 13
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 Orexin inhibits appetite.

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Question 14
True/False

 Paige wants to lose weight. The most effective long-term plan is for her to limit her intake of sweet foods.

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Question 15
Multiple Choice

 Who is doing a project on a homeostatic mechanism?

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A
Gerard who is writing a report on how the heart pumps blood.
B
Rayford who put together a presentation on parenting behaviors.
C
Dortha who put together a presentation on blood glucose levels.
D
Maisie who is writing a report on male and female sex cells.
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Question 16
Multiple Choice

 Processes that reduce any discrepancies from the set point are known as ____ .

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A
negative feedback
B
positive feedback
C
homeothermic
D
thermostasis
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Question 17
Multiple Choice

 The term ____ refers to temperature regulation and other biological processes that keep body variables within a fixed range.

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A
negative feedback
B
positive feedback
C
homeothermic
D
thermostasis
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Question 18
Multiple Choice

 A set point refers to ____ .

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A
a very narrow range that the body works to maintain at a stable level
B
the regulation of blood flow
C
the release of hormones at a set point in time
D
initiating a change in body temperature at a set point in time
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Question 19
Multiple Choice

 Homeostasis is to ____ as allostasis is to ____ .

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A
constant; variable
B
variable; constant
C
constant; decreasing
D
variable; increasing
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Question 20
Multiple Choice

 Professor Lainez explains to her class that humans will spend more energy _______ , than everything else combined.

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A
maintaining basal metabolism
B
sending glucose to the brain
C
moving around and exercising
D
pumping blood around the body and breathing
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