Question 1

What will happen to a person that is exposed to an exogenous pyrogen?

Accepted Answer

A)  This person will become hypothermic at room temperature. 
B)  This person will start a hibernation sequence similar to that seen in large bears. 
C)  This person will become a heterotherm rather than a homotherm. 
D)  This person will have a lower hypothalamic temperature set point. 
E)  This person will run a fever. 
A)  This person will become hypothermic at room temperature. 
B)  This person will start a hibernation sequence similar to that seen in large bears. 
C)  This person will become a heterotherm rather than a homotherm. 
D)  This person will have a lower hypothalamic temperature set point. 
E)  This person will run a fever.

Question 2

While working in a laboratory, you are shown a slide containing animal tissue composed of elongated cells and are told they represent the most abundant tissue type in the body. What is the function of this tissue?

Accepted Answer

A)  Thermoregulation 
B)  Conducting nerve impulses 
C)  Generating forces and causing movement 
D)  Giving strength to the skin 
E)  Carrying oxygen throughout the body 
A)  Thermoregulation 
B)  Conducting nerve impulses 
C)  Generating forces and causing movement 
D)  Giving strength to the skin 
E)  Carrying oxygen throughout the body

Question 3

Increased heat for thermoregulation or thermogenesis is produced either by shivering or by nonshivering mechanisms. Which of the following is not necessary for nonshivering thermogenesis?

Accepted Answer

A)  Brown fat 
B)  Thermogenin 
C)  Pyrogens 
D)  The consumption of metabolic fuels 
E)  The uncoupling of proton movement from ATP production 
A)  Brown fat 
B)  Thermogenin 
C)  Pyrogens 
D)  The consumption of metabolic fuels 
E)  The uncoupling of proton movement from ATP production

Question 4

Which of the following is an important difference between an ectotherm and an endotherm of similar body size?

Accepted Answer

A)  An ectotherm has higher Q10 values. 
B)  Only an ectotherm uses behavioral thermoregulation. 
C)  Only an endotherm can constrict and dilate the blood vessels to the skin to alter heat flow. 
D)  Only an endotherm can have a fever. 
E)  At a body temperature of 37°C, an ectotherm has a lower metabolic rate than an endotherm. 
A)  An ectotherm has higher Q10 values. 
B)  Only an ectotherm uses behavioral thermoregulation. 
C)  Only an endotherm can constrict and dilate the blood vessels to the skin to alter heat flow. 
D)  Only an endotherm can have a fever. 
E)  At a body temperature of 37°C, an ectotherm has a lower metabolic rate than an endotherm.

Question 5

Endotherms invest energy to maintain their body tem­perature across most of the range of environmental temperatures they encounter, except in the range of environmental temperatures

Accepted Answer

A)  that allow them to sweat. 
B)  compromise their thermoneutral zone. 
C)  above 45°C. 
D)  they encounter at night. 
E)  below 0°C. 
A)  that allow them to sweat. 
B)  compromise their thermoneutral zone. 
C)  above 45°C. 
D)  they encounter at night. 
E)  below 0°C.

Question 6

Which of the following statements about the thermoregulatory set point is true?

Accepted Answer

A)  The set point for shivering is the same as the set point for panting. 
B)  In a given individual, the set points for all thermoregulatory processes are the same. 
C)  The set points for thermoregulatory processes are the same for all members of the same species. 
D)  Changes in skin temperature can change the metabolic set point. 
E)  The temperature of the hypothalamus serves as a positive feedback signal. 
A)  The set point for shivering is the same as the set point for panting. 
B)  In a given individual, the set points for all thermoregulatory processes are the same. 
C)  The set points for thermoregulatory processes are the same for all members of the same species. 
D)  Changes in skin temperature can change the metabolic set point. 
E)  The temperature of the hypothalamus serves as a positive feedback signal.

Exam 40: Physiology, Homeostasis, and Temperature Regulation

What will happen to a person that is exposed to an exogenous pyrogen?

While working in a laboratory, you are shown a slide containing animal tissue composed of elongated cells and are told they represent the most abundant tissue type in the body. What is the function of this tissue?

Increased heat for thermoregulation or thermogenesis is produced either by shivering or by nonshivering mechanisms. Which of the following is not necessary for nonshivering thermogenesis?

Which of the following is an important difference between an ectotherm and an endotherm of similar body size?

Endotherms invest energy to maintain their body tem­perature across most of the range of environmental temperatures they encounter, except in the range of environmental temperatures

Which of the following statements about the thermoregulatory set point is true?

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Endotherms invest energy to maintain their body temperature across most of the range of environmental temperatures they encounter, except in the range of environmental temperatures