Question 1

Which of the following would cause a decrease in the hypothalamic temperature set point for metabolic heat production?

Accepted Answer

A)  Entering a cold environment 
B)  Taking an aspirin when you have a fever 
C)  Arousing from hibernation 
D)  Getting an infection that causes a fever 
E)  Cooling the hypothalamus 
A)  Entering a cold environment 
B)  Taking an aspirin when you have a fever 
C)  Arousing from hibernation 
D)  Getting an infection that causes a fever 
E)  Cooling the hypothalamus

Question 2

The reactions that comprise animal metabolism are not equally sensitive to temperature. Which of the following values reflects that fact?

Accepted Answer

A)  $\Delta$K 
B)  O2max 
C)  V2 
D)  Molecular weight 
E)  Q10 
A)  $\Delta$K 
B)  O2max 
C)  V2 
D)  Molecular weight 
E)  Q10

Question 3

The metabolic rate of a resting animal at a temperature within the thermoneutral zone is

Accepted Answer

A)  known as homeostasis. 
B)  known as hibernation. 
C)  known as basal metabolic rate. 
D)  controlled by the ambient air temperature. 
E)  known as the upper critical temperature. 
A)  known as homeostasis. 
B)  known as hibernation. 
C)  known as basal metabolic rate. 
D)  controlled by the ambient air temperature. 
E)  known as the upper critical temperature.

Question 4

If the Q10 = 2.5 for a given reaction, and the reaction produces 4,000 molecules per minute, _______ molecules per minute will be produced if body temperature is raised by 10°C.

Accepted Answer

The answer of If the Q10 = 2.5 for a...

Question 5

What types of insulation do mammals have, and what physiological controls exist to increase insulation?

Accepted Answer

Mammals use fur and fat as effective ins

Question 6

The sensitivity of a physiological process or reaction to temperature is described by its _______ value.

Accepted Answer

The answer of The sensitivity of a physiological process or...

Question 7

Endogenous pyrogens

Accepted Answer

A)  are produced by the immune system. 
B)  come from foreign substances such as bacteria or viruses that invade the body. 
C)  help regulate the body of ectotherms. 
D)  are produced by the hypothalamus. 
E)  are found only in hibernating mammals. 
A)  are produced by the immune system. 
B)  come from foreign substances such as bacteria or viruses that invade the body. 
C)  help regulate the body of ectotherms. 
D)  are produced by the hypothalamus. 
E)  are found only in hibernating mammals.

Question 8

Bone is a type of _______ tissue.

Accepted Answer

A)  connective 
B)  epithelial 
C)  matrix 
D)  muscle 
E)  nervous 
A)  connective 
B)  epithelial 
C)  matrix 
D)  muscle 
E)  nervous

Question 9

Because they are _______, lizards and snakes will position themselves in the sun to warm their bodies.

Accepted Answer

A)  homeotherms 
B)  endotherms 
C)  ectotherms 
D)  heterotherms 
E)  poikilotherms 
A)  homeotherms 
B)  endotherms 
C)  ectotherms 
D)  heterotherms 
E)  poikilotherms

Question 10

Which of the following is a characteristic unique to connective tissue?

Accepted Answer

A)  Highly modified cells that show the special property of contractibility 
B)  Diverse anatomy with distinct specializations for information transfer 
C)  The composition of the lining of the inner surfaces of the intestines and lungs in mammals 
D)  A loose array of cells embedded in an extracellular matrix 
E)  The ability to synthesize large amounts of the protein collagen. 
A)  Highly modified cells that show the special property of contractibility 
B)  Diverse anatomy with distinct specializations for information transfer 
C)  The composition of the lining of the inner surfaces of the intestines and lungs in mammals 
D)  A loose array of cells embedded in an extracellular matrix 
E)  The ability to synthesize large amounts of the protein collagen.

Question 11

Blood is a type of _______ tissue.

Accepted Answer

A)  connective 
B)  epithelial 
C)  matrix 
D)  muscle 
E)  nervous 
A)  connective 
B)  epithelial 
C)  matrix 
D)  muscle 
E)  nervous

Question 12

A number of physiological processes can undergo acclimatization. Which of the following statements about acclimatization is false?

Accepted Answer

A)  It occurs in response to seasonal temperature changes. 
B)  Acclimatization of metabolic rate occurs because enzyme expression changes. 
C)  It involves the changing of a set point. 
D)  All multicellular animals are capable of acclimating to all the environmental changes they face. 
E)  Acclimatization is primarily seen in organisms with body temperatures tightly coupled to the environmental temperatures. 
A)  It occurs in response to seasonal temperature changes. 
B)  Acclimatization of metabolic rate occurs because enzyme expression changes. 
C)  It involves the changing of a set point. 
D)  All multicellular animals are capable of acclimating to all the environmental changes they face. 
E)  Acclimatization is primarily seen in organisms with body temperatures tightly coupled to the environmental temperatures.

Question 13

Which of the following is an important adaptation of animals to cold climates?

Accepted Answer

A)  Increased tendency to shiver 
B)  Thinner layers of body fat 
C)  Reduced density of fur or feathers 
D)  Reduced surface area-to-volume ratio 
E)  Increased flow of blood to surface 
A)  Increased tendency to shiver 
B)  Thinner layers of body fat 
C)  Reduced density of fur or feathers 
D)  Reduced surface area-to-volume ratio 
E)  Increased flow of blood to surface

Question 14

Which of the following physiological control mechanisms is a response to a rise in body temperature?

Accepted Answer

A)  Slower heart rate 
B)  Increased blood flow to the skin 
C)  Constriction of blood vessels in the skin 
D)  Contraction of muscles 
E)  Retention of water 
A)  Slower heart rate 
B)  Increased blood flow to the skin 
C)  Constriction of blood vessels in the skin 
D)  Contraction of muscles 
E)  Retention of water

Question 15

Which of the following statements about positive feedback is false?

Accepted Answer

A)  It is more commonly observed than negative feedback. 
B)  It tends to reach a limit and terminate rapidly. 
C)  It amplifies a response. 
D)  Contractions of the uterus are an example of positive feedback. 
E)  Sexual behavior is an example of positive feedback. 
A)  It is more commonly observed than negative feedback. 
B)  It tends to reach a limit and terminate rapidly. 
C)  It amplifies a response. 
D)  Contractions of the uterus are an example of positive feedback. 
E)  Sexual behavior is an example of positive feedback.

Question 16

You read about a mammal that has very leaky mitochondrial membranes because they have a higher concentration of thermogenin in their mitochondrial membranes than typical mammals. Because of this, you would predict that this animal would

Accepted Answer

A)  be well adapted for warm weather. 
B)  use less food per gram of body weight. 
C)  have well-developed countercurrent heat exchange system. 
D)  have a greater amount of food resources allocated to temperature regulation in warmer climates than a typical mammal. 
E)  None of the above 
A)  be well adapted for warm weather. 
B)  use less food per gram of body weight. 
C)  have well-developed countercurrent heat exchange system. 
D)  have a greater amount of food resources allocated to temperature regulation in warmer climates than a typical mammal. 
E)  None of the above

Question 17

Which of the following is the thermoregulatory response of the hypothalamus to a rise in 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 18

Which of the following statements about hypothalamic function is false?

Accepted Answer

A)  Circulating blood temperature is monitored by the hypothalamus. 
B)  Hypothalamic thermal set points never change. 
C)  The hypothalamus is a part of the central nervous system. 
D)  Different thermoregulatory responses have different hypothalamic set points. 
E)  The hypothalamus is important in fish, birds, amphibians, reptiles, and mammals. 
A)  Circulating blood temperature is monitored by the hypothalamus. 
B)  Hypothalamic thermal set points never change. 
C)  The hypothalamus is a part of the central nervous system. 
D)  Different thermoregulatory responses have different hypothalamic set points. 
E)  The hypothalamus is important in fish, birds, amphibians, reptiles, and mammals.

Question 19

In certain "hot" fish such as bluefin tuna, heat is exchanged between vessels carrying blood in opposite directions. This mechanism is called _______.

Accepted Answer

countercur

Question 20

In fast-swimming cool-water fishes such as sharks and tunas, which of the following contribute(s) to the generation and maintenance of core body temperatures in excess of ambient water temperatures?

Accepted Answer

A)  Specializations in the size and arrangement of blood vessels 
B)  Low rates of activity in the swimming muscles 
C)  An ability to acclimatize rapidly to the surrounding water 
D)  Metabolic rates that are insensitive to temperature change 
E)  An insulating layer of fat located beneath the scaled skin. 
A)  Specializations in the size and arrangement of blood vessels 
B)  Low rates of activity in the swimming muscles 
C)  An ability to acclimatize rapidly to the surrounding water 
D)  Metabolic rates that are insensitive to temperature change 
E)  An insulating layer of fat located beneath the scaled skin.

Exam 40: Physiology, Homeostasis, and Temperature Regulation

Which of the following would cause a decrease in the hypothalamic temperature set point for metabolic heat production?

The reactions that comprise animal metabolism are not equally sensitive to temperature. Which of the following values reflects that fact?

The metabolic rate of a resting animal at a temperature within the thermoneutral zone is

If the Q10 = 2.5 for a given reaction, and the reaction produces 4,000 molecules per minute, _______ molecules per minute will be produced if body temperature is raised by 10°C.

What types of insulation do mammals have, and what physiological controls exist to increase insulation?

The sensitivity of a physiological process or reaction to temperature is described by its _______ value.

Endogenous pyrogens

Bone is a type of _______ tissue.

Because they are _______, lizards and snakes will position themselves in the sun to warm their bodies.

Which of the following is a characteristic unique to connective tissue?

Blood is a type of _______ tissue.

A number of physiological processes can undergo acclimatization. Which of the following statements about acclimatization is false?

Which of the following is an important adaptation of animals to cold climates?

Which of the following physiological control mechanisms is a response to a rise in body temperature?

Which of the following statements about positive feedback is false?

You read about a mammal that has very leaky mitochondrial membranes because they have a higher concentration of thermogenin in their mitochondrial membranes than typical mammals. Because of this, you would predict that this animal would

Which of the following is the thermoregulatory response of the hypothalamus to a rise in temperature?

Which of the following statements about hypothalamic function is false?

In certain "hot" fish such as bluefin tuna, heat is exchanged between vessels carrying blood in opposite directions. This mechanism is called _______.

In fast-swimming cool-water fishes such as sharks and tunas, which of the following contribute(s) to the generation and maintenance of core body temperatures in excess of ambient water temperatures?

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If the Q₁₀ = 2.5 for a given reaction, and the reaction produces 4,000 molecules per minute, _______ molecules per minute will be produced if body temperature is raised by 10°C.