Question 1

Countercurrent heat exchange

Accepted Answer

A)  moves warm blood coming from the muscles past cold blood flowing into the muscles. 
B)  allows "hot" fish to maintain body temperatures higher than the surrounding water temperature. 
C)  is found in large, rapidly swimming fish. 
D)  increases a fish's sustainable power output threefold for every 10°C rise in muscle temperature. 
E)  All of the above 
A)  moves warm blood coming from the muscles past cold blood flowing into the muscles. 
B)  allows "hot" fish to maintain body temperatures higher than the surrounding water temperature. 
C)  is found in large, rapidly swimming fish. 
D)  increases a fish's sustainable power output threefold for every 10°C rise in muscle temperature. 
E)  All of the above E

Question 2

_______ feedback amplifies a response or increases deviation from a set point.

Accepted Answer

Positive

Question 3

Although there are many kinds of specialized cell types, there are only _______ kinds of tissues.

Accepted Answer

A)  1 
B)  14 
C)  4 
D)  3 
E)  6 
A)  1 
B)  14 
C)  4 
D)  3 
E)  6 C

Question 4

During childbirth, the pressure exerted on the mother's cervix by the emerging infant leads to increased contraction of the uterus. This interaction can be explained by

Accepted Answer

A)  negative feedback. 
B)  feedforward feedback. 
C)  positive feedback. 
D)  acclimatization. 
E)  homeostasis. 
A)  negative feedback. 
B)  feedforward feedback. 
C)  positive feedback. 
D)  acclimatization. 
E)  homeostasis.

Question 5

Suppose that the rate of a particular biological function at 15°C is X. If the Q10 of that function at 25°C is _______, the rate is _______.

Accepted Answer

A)  1; X 
B)  1; 25 
C)  2; X 
D)  3; 2X 
E)  3; 30 
A)  1; X 
B)  1; 25 
C)  2; X 
D)  3; 2X 
E)  3; 30

Question 6

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)  None of the above 
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)  None of the above

Question 7

Some animals use brown fat as a source of heat generation. Which of the following statements about brown fat is false?

Accepted Answer

A)  Brown fat is involved in nonshivering thermogenesis. 
B)  The protein thermogenin in brown fat is involved in uncoupling proton movement from ATP production. 
C)  Brown fat is found in endotherms. 
D)  Brown fat is highly vascularized. 
E)  Brown fat cells contain few mitochondria 
A)  Brown fat is involved in nonshivering thermogenesis. 
B)  The protein thermogenin in brown fat is involved in uncoupling proton movement from ATP production. 
C)  Brown fat is found in endotherms. 
D)  Brown fat is highly vascularized. 
E)  Brown fat cells contain few mitochondria

Question 8

Use the following to answer questions :
Predict the probable metabolic response of a mam­mal exposed to a 3°-5°C environmental temperature change from the list below. 
-The environmental temperature decreases far below 0°C.

Accepted Answer

A)  Increased metabolic rate 
B)  Decreased metabolic rate 
C)  No change in metabolic rate 
D)  Death 
A)  Increased metabolic rate 
B)  Decreased metabolic rate 
C)  No change in metabolic rate 
D)  Death

Question 9

Homeostasis refers to the tendency to keep body systems

Accepted Answer

A)  matched to the external environment. 
B)  the same relative to one another. 
C)  in a steady state over time. 
D)  under the control of the brain. 
E)  at the same specific temperature. 
A)  matched to the external environment. 
B)  the same relative to one another. 
C)  in a steady state over time. 
D)  under the control of the brain. 
E)  at the same specific temperature.

Question 10

Which of the following statements about hibernation is false?

Accepted Answer

A)  It may be interrupted by brief returns to normal body temperature. 
B)  It is a form of regulated hypothermia. 
C)  The body's thermostat is turned down to a low level. 
D)  Metabolic rate is reduced to only a fraction of the basal metabolic rate. 
E)  It is found in more species of birds than in species of mammals. 
A)  It may be interrupted by brief returns to normal body temperature. 
B)  It is a form of regulated hypothermia. 
C)  The body's thermostat is turned down to a low level. 
D)  Metabolic rate is reduced to only a fraction of the basal metabolic rate. 
E)  It is found in more species of birds than in species of mammals.

Question 11

The thermoregulatory functions of the hypothalamus have been studied by implanting probes to heat or cool the hypothalamus of small mammals. If the hypothalamus is cooled, the animal will

Accepted Answer

A)  decrease metabolic heat production. 
B)  stop shivering. 
C)  produce more brown fat than white fat. 
D)  increase metabolic heat production. 
E)  immediately begin panting and sweating. 
A)  decrease metabolic heat production. 
B)  stop shivering. 
C)  produce more brown fat than white fat. 
D)  increase metabolic heat production. 
E)  immediately begin panting and sweating.

Question 12

_______ are cells of the nervous system that do not conduct signals.

Accepted Answer

A)  Hormones 
B)  Neurons 
C)  Glial cells 
D)  Ductless glands 
E)  Skeletal muscle cells 
A)  Hormones 
B)  Neurons 
C)  Glial cells 
D)  Ductless glands 
E)  Skeletal muscle cells

Question 13

Readjustment of an ectotherm's metabolic rate to compensate for seasonal thermal change is caused by the production of different

Accepted Answer

A)  thermogenins. 
B)  pyrogens. 
C)  isozymes. 
D)  countercurrent exchangers. 
E)  None of the above 
A)  thermogenins. 
B)  pyrogens. 
C)  isozymes. 
D)  countercurrent exchangers. 
E)  None of the above

Question 14

Which of the following statements about brown fat is false?

Accepted Answer

A)  It contains abundant mitochondria. 
B)  It provides the most energy for shivering. 
C)  It allows metabolic fuels to be consumed without producing ATP. 
D)  It uses thermogenin to uncouple proton movement from ATP production. 
E)  It is more abundant in hibernating animals. 
A)  It contains abundant mitochondria. 
B)  It provides the most energy for shivering. 
C)  It allows metabolic fuels to be consumed without producing ATP. 
D)  It uses thermogenin to uncouple proton movement from ATP production. 
E)  It is more abundant in hibernating animals.

Question 15

The countercurrent heat exchanger of some large, rapidly swimming "hot" fish,

Accepted Answer

A)  traps heat in the muscles. 
B)  produces heat. 
C)  cools the blood returning to the heart. 
D)  lowers the internal body temperature to that of the surrounding water. 
E)  cools the skin. 
A)  traps heat in the muscles. 
B)  produces heat. 
C)  cools the blood returning to the heart. 
D)  lowers the internal body temperature to that of the surrounding water. 
E)  cools the skin.

Question 16

A state of below-normal body temperature is called _______. When this condition is regulated, lasts for days or weeks, and is characterized by very low body temperatures, it is called _______.

Accepted Answer

hypothermi

Question 17

The four types of tissues are epithelial, muscle, nervous, and _______.

Accepted Answer

The answer of The four types of tissues are epithelial,...

Question 18

Which of the following statements about muscle tissue is false?

Accepted Answer

A)  It consists of cells that can contract. 
B)  It is the most abundant tissue in the body. 
C)  It is a form of connective tissue. 
D)  It uses a lot of energy when animals are active. 
E)  It includes skeletal, smooth, and cardiac muscle. 
A)  It consists of cells that can contract. 
B)  It is the most abundant tissue in the body. 
C)  It is a form of connective tissue. 
D)  It uses a lot of energy when animals are active. 
E)  It includes skeletal, smooth, and cardiac muscle.

Question 19

In a mammal, metabolic rate is highest when the temperature is _______ the thermoneutral zone and the animal is _______.

Accepted Answer

A)  within; at rest 
B)  below; active 
C)  within; active 
D)  above; at rest 
E)  below; at rest 
A)  within; at rest 
B)  below; active 
C)  within; active 
D)  above; at rest 
E)  below; at rest

Question 20

Within a range of environmental temperatures called the thermoneutral zone, the metabolic rate of an endotherm is

Accepted Answer

A)  variable. 
B)  low, and independent of temperature. 
C)  high, and independent of temperature. 
D)  below the basal metabolic rate. 
E)  dependent upon the temperature. 
A)  variable. 
B)  low, and independent of temperature. 
C)  high, and independent of temperature. 
D)  below the basal metabolic rate. 
E)  dependent upon the temperature.

Exam 40: Physiology, Homeostasis, and Temperature Regulation

Countercurrent heat exchange

_______ feedback amplifies a response or increases deviation from a set point.

Although there are many kinds of specialized cell types, there are only _______ kinds of tissues.

During childbirth, the pressure exerted on the mother's cervix by the emerging infant leads to increased contraction of the uterus. This interaction can be explained by

Suppose that the rate of a particular biological function at 15°C is X. If the Q10 of that function at 25°C is _______, the rate is _______.

Most physiological processes

Some animals use brown fat as a source of heat generation. Which of the following statements about brown fat is false?

Use the following to answer questions : Predict the probable metabolic response of a mam­mal exposed to a 3°-5°C environmental temperature change from the list below. -The environmental temperature decreases far below 0°C.

Homeostasis refers to the tendency to keep body systems

Which of the following statements about hibernation is false?

The thermoregulatory functions of the hypothalamus have been studied by implanting probes to heat or cool the hypothalamus of small mammals. If the hypothalamus is cooled, the animal will

_______ are cells of the nervous system that do not conduct signals.

Readjustment of an ectotherm's metabolic rate to compensate for seasonal thermal change is caused by the production of different

Which of the following statements about brown fat is false?

The countercurrent heat exchanger of some large, rapidly swimming "hot" fish,

A state of below-normal body temperature is called _______. When this condition is regulated, lasts for days or weeks, and is characterized by very low body temperatures, it is called _______.

The four types of tissues are epithelial, muscle, nervous, and _______.

Which of the following statements about muscle tissue is false?

In a mammal, metabolic rate is highest when the temperature is _______ the thermoneutral zone and the animal is _______.

Within a range of environmental temperatures called the thermoneutral zone, the metabolic rate of an endotherm is

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Suppose that the rate of a particular biological function at 15°C is X. If the Q₁₀ of that function at 25°C is _, the rate is _.

Use the following to answer questions : Predict the probable metabolic response of a mammal exposed to a 3°-5°C environmental temperature change from the list below. -The environmental temperature decreases far below 0°C.

A state of below-normal body temperature is called _. When this condition is regulated, lasts for days or weeks, and is characterized by very low body temperatures, it is called _.

In a mammal, metabolic rate is highest when the temperature is _ the thermoneutral zone and the animal is _.