Question 1

Which is most likely to occur if a baby bat's hypothalamus is experimentally cooled using an implanted probe?

Accepted Answer

A)  A drop in the bat's core body temperature 
B)  Stimulation of nonshivering thermogenesis in brown fat 
C)  Sweating or panting to increase evaporative water loss 
D)  Decreased metabolic rate 
E)  Dilation of skin blood vessels 
A)  A drop in the bat's core body temperature 
B)  Stimulation of nonshivering thermogenesis in brown fat 
C)  Sweating or panting to increase evaporative water loss 
D)  Decreased metabolic rate 
E)  Dilation of skin blood vessels

Question 2

Refer to the figure showing the results of an experiment on a ground squirrel.Experimenters used a probe to directly heat or cool the squirrel's hypothalamus and measured the animal's metabolic rate and body temperature in response to this manipulation.   When the hypothalamus was cooled, the squirrel's metabolic rate and body temperature _______.

Accepted Answer

The answer of Refer to the figure showing the results...

Question 3

Organisms that depend largely on external sources of heat to maintain body temperature are called

Accepted Answer

A)  homeothermic. 
B)  endothermic. 
C)  heterothermic. 
D)  ectothermic. 
E)  mesothermic. 
A)  homeothermic. 
B)  endothermic. 
C)  heterothermic. 
D)  ectothermic. 
E)  mesothermic.

Question 4

If a cancer patient develops a fever of 104°F, it is likely that a physician will prescribe a treatment to lower the patient's temperature because

Accepted Answer

A)  cancer treatments and hyperthermia are always a dangerous combination. 
B)  a fever is never advantageous for a cancer patient. 
C)  this is close to the highest temperature the body's cells can survive. 
D)  crystals are likely to form that will damage cell structures. 
E)  hypothermia is a safer condition than hyperthermia. 
A)  cancer treatments and hyperthermia are always a dangerous combination. 
B)  a fever is never advantageous for a cancer patient. 
C)  this is close to the highest temperature the body's cells can survive. 
D)  crystals are likely to form that will damage cell structures. 
E)  hypothermia is a safer condition than hyperthermia.

Question 5

Q10 describes the

Accepted Answer

A)  pH sensitivity of a reaction or process. 
B)  temperature sensitivity of a reaction or process. 
C)  rate of a chemical reaction at 0°C. 
D)  rate of a chemical reaction at 100°C. 
E)  additive increase in chemical reaction rates. 
A)  pH sensitivity of a reaction or process. 
B)  temperature sensitivity of a reaction or process. 
C)  rate of a chemical reaction at 0°C. 
D)  rate of a chemical reaction at 100°C. 
E)  additive increase in chemical reaction rates.

Question 6

Which of the following would serve to change the set point of a regulatory system?

Accepted Answer

A)  Negative feedback 
B)  Positive feedback 
C)  Feedforward information 
D)  Insensitivity to information 
E)  Sensitivity that amplifies a response 
A)  Negative feedback 
B)  Positive feedback 
C)  Feedforward information 
D)  Insensitivity to information 
E)  Sensitivity that amplifies a response

Question 7

Heterotherms differ from endotherms in that only heterotherms

Accepted Answer

A)  can regulate their own body temperature. 
B)  have body temperatures determined primarily by external sources of heat. 
C)  maintain a constant body temperature despite changes in outside temperature. 
D)  always have a negative Q10. 
E)  can sometimes behave as endotherms and at other times as ectotherms. 
A)  can regulate their own body temperature. 
B)  have body temperatures determined primarily by external sources of heat. 
C)  maintain a constant body temperature despite changes in outside temperature. 
D)  always have a negative Q10. 
E)  can sometimes behave as endotherms and at other times as ectotherms.

Question 8

Which is a type of muscle tissue?

Accepted Answer

A)  Cardiac 
B)  Connective 
C)  Retina 
D)  Mucosa 
E)  Collagen 
A)  Cardiac 
B)  Connective 
C)  Retina 
D)  Mucosa 
E)  Collagen

Question 9

Most physiological processes

Accepted Answer

A)  occur more rapidly at higher temperatures. 
B)  occur less rapidly at higher temperatures. 
C)  are not temperature sensitive. 
D)  maintain a constant rate as temperature increases. 
E)  maintain a constant rate as temperature fluctuates between 0°C and 40°C. 
A)  occur more rapidly at higher temperatures. 
B)  occur less rapidly at higher temperatures. 
C)  are not temperature sensitive. 
D)  maintain a constant rate as temperature increases. 
E)  maintain a constant rate as temperature fluctuates between 0°C and 40°C.

Question 10

Positive feedback responses

Accepted Answer

A)  are long-term, stable influences in the body. 
B)  can increase or decrease the deviation from a set point. 
C)  are more common than negative feedback responses. 
D)  tend to reach a limit and then terminate. 
E)  cause physiological parameters to cycle above and below a set point. 
A)  are long-term, stable influences in the body. 
B)  can increase or decrease the deviation from a set point. 
C)  are more common than negative feedback responses. 
D)  tend to reach a limit and then terminate. 
E)  cause physiological parameters to cycle above and below a set point.

Question 11

Which statement is true?

Accepted Answer

A)  In mammals, the set points for thermoregulatory responses are higher when skin is cold than when skin is hot. 
B)  In mammals maintained under constant environmental conditions, set points for thermoregulatory responses are constant. 
C)  Change in skin temperature provides positive feedback information to the mammalian thermoregulatory system. 
D)  Mild warming of the hypothalamus increases metabolic rate. 
E)  Mild cooling of the hypothalamus causes a drop in body temperature. 
A)  In mammals, the set points for thermoregulatory responses are higher when skin is cold than when skin is hot. 
B)  In mammals maintained under constant environmental conditions, set points for thermoregulatory responses are constant. 
C)  Change in skin temperature provides positive feedback information to the mammalian thermoregulatory system. 
D)  Mild warming of the hypothalamus increases metabolic rate. 
E)  Mild cooling of the hypothalamus causes a drop in body temperature.

Question 12

The reactions that make up animal metabolism are not equally sensitive to temperature.Which value reflects that fact?

Accepted Answer

A)  F1F1F1S1F1F1F10K 
B)  O2max 
C)  V2 
D)  Molecular weight 
E)  Q10 
A)  F1F1F1S1F1F1F10K 
B)  O2max 
C)  V2 
D)  Molecular weight 
E)  Q10

Question 13

A weight lifter does multiple sets of bench presses, as many repetitions per set as she can.If she cools her palms while resting between sets, she can increase the total number of lifts she can complete in her workout.The most likely explanation for this is that

Accepted Answer

A)  cooled skin makes it easier to grip the weight bar. 
B)  touching the weight bar with cooler hands causes a release of endorphins. 
C)  extracting heat from the palms increases the capacity of arm muscles to do work. 
D)  cooler palms trick the brain into feeling like the weight of the bar has decreased. 
E)  reducing the amount of heat generated from lifting reduces the amount of ATP being used. 
A)  cooled skin makes it easier to grip the weight bar. 
B)  touching the weight bar with cooler hands causes a release of endorphins. 
C)  extracting heat from the palms increases the capacity of arm muscles to do work. 
D)  cooler palms trick the brain into feeling like the weight of the bar has decreased. 
E)  reducing the amount of heat generated from lifting reduces the amount of ATP being used.

Question 14

The maintenance of stable physiological conditions in the internal environment of an organism is called _______.

Accepted Answer

The answer of The maintenance of stable physiological conditions in...

Question 15

Tissues that secrete digestive juices into the gut are composed of

Accepted Answer

A)  epithelial cells. 
B)  neurons. 
C)  smooth muscle cells. 
D)  chondrocytes. 
E)  connective tissue cells. 
A)  epithelial cells. 
B)  neurons. 
C)  smooth muscle cells. 
D)  chondrocytes. 
E)  connective tissue cells.

Question 16

While you sit quietly on a warm beach, a breeze picks up and you suddenly feel cold.This loss of body heat is most likely due to

Accepted Answer

A)  radiation. 
B)  evaporation. 
C)  convection. 
D)  conduction. 
E)  reflection. 
A)  radiation. 
B)  evaporation. 
C)  convection. 
D)  conduction. 
E)  reflection.

Question 17

Which situation would not be suitable for obtaining an accurate measurement of a mammal's basal metabolic rate?

Accepted Answer

A)  The animal is at rest. 
B)  The temperature is within the thermoneutral zone. 
C)  The animal is lactating. 
D)  The animal has reached adult body size. 
E)  The animal is awake. 
A)  The animal is at rest. 
B)  The temperature is within the thermoneutral zone. 
C)  The animal is lactating. 
D)  The animal has reached adult body size. 
E)  The animal is awake.

Question 18

When you start exercising, your breathing rate and heart rate increase in anticipation of the additional oxygen your muscles will need.Is this an example of negative feedback, positive feedback, or a feedforward control mechanism? Explain your answer.

Accepted Answer

This is an example of a feedforward cont

Question 19

Which of the following would be stimulated by a rise in a mammal's hypothalamic temperature?

Accepted Answer

A)  Increased metabolic heat production 
B)  Resetting of the thermostat to a higher setting 
C)  Dilation of blood vessels in the skin 
D)  Overall increase in body temperature 
E)  Initiation of shivering movements 
A)  Increased metabolic heat production 
B)  Resetting of the thermostat to a higher setting 
C)  Dilation of blood vessels in the skin 
D)  Overall increase in body temperature 
E)  Initiation of shivering movements

Question 20

The list below shows possible metabolic responses of a mammal to environmental temperature change.Choose the most likely response of a mammal when the environmental temperature increases far above 50°C.

Accepted Answer

A)  Increased metabolic rate 
B)  Decreased metabolic rate 
C)  No change in metabolic rate 
D)  Initial decrease in metabolic rate followed by an increase 
E)  Death 
A)  Increased metabolic rate 
B)  Decreased metabolic rate 
C)  No change in metabolic rate 
D)  Initial decrease in metabolic rate followed by an increase 
E)  Death

Exam 39: Physiology, Homeostasis, and Temperature Regulation

Which is most likely to occur if a baby bat's hypothalamus is experimentally cooled using an implanted probe?

Organisms that depend largely on external sources of heat to maintain body temperature are called

If a cancer patient develops a fever of 104°F, it is likely that a physician will prescribe a treatment to lower the patient's temperature because

Q10 describes the

Which of the following would serve to change the set point of a regulatory system?

Heterotherms differ from endotherms in that only heterotherms

Which is a type of muscle tissue?

Most physiological processes

Positive feedback responses

Which statement is true?

The reactions that make up animal metabolism are not equally sensitive to temperature.Which value reflects that fact?

A weight lifter does multiple sets of bench presses, as many repetitions per set as she can.If she cools her palms while resting between sets, she can increase the total number of lifts she can complete in her workout.The most likely explanation for this is that

The maintenance of stable physiological conditions in the internal environment of an organism is called _______.

Tissues that secrete digestive juices into the gut are composed of

While you sit quietly on a warm beach, a breeze picks up and you suddenly feel cold.This loss of body heat is most likely due to

Which situation would not be suitable for obtaining an accurate measurement of a mammal's basal metabolic rate?

When you start exercising, your breathing rate and heart rate increase in anticipation of the additional oxygen your muscles will need.Is this an example of negative feedback, positive feedback, or a feedforward control mechanism? Explain your answer.

Which of the following would be stimulated by a rise in a mammal's hypothalamic temperature?

The list below shows possible metabolic responses of a mammal to environmental temperature change.Choose the most likely response of a mammal when the environmental temperature increases far above 50°C.

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