Question 1

Which animal is behaving as an endotherm to warm its body?

Accepted Answer

A)  A moth that quivers its wings before flight 
B)  A black beetle that absorbs solar radiation 
C)  A snake that lies on a warm blacktop road 
D)  A fish that moves to a warm, shallow part of a pond 
E)  An insect that positions its body for maximum exposure to sunlight 
A)  A moth that quivers its wings before flight 
B)  A black beetle that absorbs solar radiation 
C)  A snake that lies on a warm blacktop road 
D)  A fish that moves to a warm, shallow part of a pond 
E)  An insect that positions its body for maximum exposure to sunlight

Question 2

A squirrel that metabolically maintains its internal temperature during the summer but hibernates during the winter is a(n)

Accepted Answer

A)  ectotherm. 
B)  heterotherm. 
C)  pyrotherm. 
D)  varitherm. 
E)  endotherm. 
A)  ectotherm. 
B)  heterotherm. 
C)  pyrotherm. 
D)  varitherm. 
E)  endotherm.

Question 3

Which characteristic pertains to brown fat?

Accepted Answer

A)  Its cells have numerous mitochondria. 
B)  It is poorly vascularized. 
C)  It is only found in newborn mammals, including human infants. 
D)  It is found primarily in the abdomen region. 
E)  In each of its cells there is a single large lipid droplet. 
A)  Its cells have numerous mitochondria. 
B)  It is poorly vascularized. 
C)  It is only found in newborn mammals, including human infants. 
D)  It is found primarily in the abdomen region. 
E)  In each of its cells there is a single large lipid droplet.

Question 4

Which statement is true?

Accepted Answer

A)  Sweating is the primary method of getting rid of heat for endotherms living in hot, dry habitats. 
B)  The heat-absorbing capacity of air is much greater than that of water. 
C)  A panting dog generates heat in the process of getting rid of heat. 
D)  When sweat drips from your face, the skin of your face cools. 
E)  Metabolic rate decreases when the upper critical temperature is exceeded. 
A)  Sweating is the primary method of getting rid of heat for endotherms living in hot, dry habitats. 
B)  The heat-absorbing capacity of air is much greater than that of water. 
C)  A panting dog generates heat in the process of getting rid of heat. 
D)  When sweat drips from your face, the skin of your face cools. 
E)  Metabolic rate decreases when the upper critical temperature is exceeded.

Question 5

Suppose an airline pilot sets an aircraft's engines to produce a velocity of 450 mph and measures that speed using an instrument on the outside of the plane.When another pilot reports turbulence ahead, the pilot changes the velocity set point to 350 mph.The instrument on the outside of the plane is providing

Accepted Answer

A)  an error signal. 
B)  a set point. 
C)  an effector. 
D)  feedback. 
E)  homeostasis. 
A)  an error signal. 
B)  a set point. 
C)  an effector. 
D)  feedback. 
E)  homeostasis.

Question 6

Mammals and birds have scroll-like bones, called turbinates, in their nasal cavities.These are covered by epithelial tissue.As inhaled air is warmed and moistened in the nasal cavity, the surface of the turbinates _______ because of _______.

Accepted Answer

A)  cools; metabolism 
B)  cools; evaporation 
C)  cools; conduction 
D)  warms; radiation 
E)  warms; conduction 
A)  cools; metabolism 
B)  cools; evaporation 
C)  cools; conduction 
D)  warms; radiation 
E)  warms; conduction

Question 7

The maintenance of a relatively constant internal environment is called

Accepted Answer

A)  a controlled system. 
B)  a regulatory system. 
C)  positive feedback. 
D)  negative feedback. 
E)  homeostasis. 
A)  a controlled system. 
B)  a regulatory system. 
C)  positive feedback. 
D)  negative feedback. 
E)  homeostasis.

Question 8

The thermal limits for most functions in animal cells range from approximately

Accepted Answer

A)  0°C to 40°C. 
B)  0°C to 100°C. 
C)  10°C to 70°C. 
D)  30°C to 40°C. 
E)  30°C to 70°C. 
A)  0°C to 40°C. 
B)  0°C to 100°C. 
C)  10°C to 70°C. 
D)  30°C to 40°C. 
E)  30°C to 70°C.

Question 9

Refer to the graph.   The Q10 of the reaction shown at A is _______, and the Q10 of the reaction shown at B is _______.

Accepted Answer

Question 10

The thermoneutral zone of an endotherm is a

Accepted Answer

A)  narrow range of body temperatures within which metabolic rate is low. 
B)  narrow range of environmental temperatures within which metabolic rate is low and independent of temperature. 
C)  habitat with constant environmental temperatures. 
D)  range of body temperatures within which life is possible for that particular species. 
E)  wide range of environmental temperatures within which metabolic rate is low and dependent on temperature. 
A)  narrow range of body temperatures within which metabolic rate is low. 
B)  narrow range of environmental temperatures within which metabolic rate is low and independent of temperature. 
C)  habitat with constant environmental temperatures. 
D)  range of body temperatures within which life is possible for that particular species. 
E)  wide range of environmental temperatures within which metabolic rate is low and dependent on temperature.

Question 11

_______ tissue forms the innermost lining of abdominal organs.

Accepted Answer

A)  Muscle 
B)  Adipose 
C)  Connective 
D)  Epithelial 
E)  Nervous 
A)  Muscle 
B)  Adipose 
C)  Connective 
D)  Epithelial 
E)  Nervous

Question 12

Sea urchins attach to rocks and use specialized mouth structures to feed.They have an evolutionary advantage over unicellular planktonic protozoa floating by in that they can more effectively _______ on other organisms and resist the forces of waves.

Accepted Answer

The answer of Sea urchins attach to rocks and use...

Question 13

The value of Q10, which describes the sensitivity of a reaction to temperature, is calculated as the

Accepted Answer

A)  rate of a process at a certain temperature, divided by its rate at 10°C. 
B)  rate of a process at a certain temperature, divided by its rate at a temperature 10°C lower. 
C)  rate of a process at a certain temperature, divided by its rate at a temperature 10°C higher. 
D)  temperature at which the rate of a certain process doubles. 
E)  temperature at which the rate of a certain process becomes insignificant. 
A)  rate of a process at a certain temperature, divided by its rate at 10°C. 
B)  rate of a process at a certain temperature, divided by its rate at a temperature 10°C lower. 
C)  rate of a process at a certain temperature, divided by its rate at a temperature 10°C higher. 
D)  temperature at which the rate of a certain process doubles. 
E)  temperature at which the rate of a certain process becomes insignificant.

Question 14

Compared with "cold" fish, "hot" fish, such as bluefin tuna, keep a higher temperature difference between their body and the surrounding water in part because they

Accepted Answer

A)  produce thermogenins. 
B)  have a countercurrent heat exchange system of veins and arteries. 
C)  shiver to create more heat. 
D)  have many brown fat tissues. 
E)  have a large dorsal aorta that keeps them warm. 
A)  produce thermogenins. 
B)  have a countercurrent heat exchange system of veins and arteries. 
C)  shiver to create more heat. 
D)  have many brown fat tissues. 
E)  have a large dorsal aorta that keeps them warm.

Question 15

Your tongue includes all four tissue types.Use your knowledge of tissue types and their functions to deduce how each tissue type might help form your tongue.

Accepted Answer

Epithelial cells cover the surface of th

Question 16

A chemical reaction has a Q10 of 3.Which rates characterize this reaction?

Accepted Answer

A)  A rate of 6 at 20°C and 2 at 30°C 
B)  A rate of 6 at 30°C and 2 at 20°C 
C)  A rate of 9 at 20°C and 3 at 40°C 
D)  A rate of 9 at 40°C and 3 at 20°C 
E)  A rate of 12 at 10°C and 4 at 20°C 
A)  A rate of 6 at 20°C and 2 at 30°C 
B)  A rate of 6 at 30°C and 2 at 20°C 
C)  A rate of 9 at 20°C and 3 at 40°C 
D)  A rate of 9 at 40°C and 3 at 20°C 
E)  A rate of 12 at 10°C and 4 at 20°C

Question 17

Which anatomical feature possessed by endotherms reduces heat loss?

Accepted Answer

A)  Narrow body shape 
B)  Short appendages 
C)  Minimal thermal insulation 
D)  Increased surface area-to-volume ratio as size increases 
E)  Increased sweat glands 
A)  Narrow body shape 
B)  Short appendages 
C)  Minimal thermal insulation 
D)  Increased surface area-to-volume ratio as size increases 
E)  Increased sweat glands

Question 18

In regulatory systems, negative feedback

Accepted Answer

A)  is the least common type of feedback mechanism. 
B)  stimulates a return toward the set point. 
C)  amplifies a response. 
D)  disrupts homeostasis. 
E)  is an error signal. 
A)  is the least common type of feedback mechanism. 
B)  stimulates a return toward the set point. 
C)  amplifies a response. 
D)  disrupts homeostasis. 
E)  is an error signal.

Question 19

Refer to the figure.   Which of these images is of connective tissue and no other tissue type?

Accepted Answer

A)  A 
B)  B 
C)  C 
D)  D 
E)  E 
A)  A 
B)  B 
C)  C 
D)  D 
E)  E

Question 20

Compared with a planktonic protozoan, a sponge living in the ocean has the advantage of being able to

Accepted Answer

A)  extract energy and nutrients from the environment. 
B)  eliminate toxins and metabolic waste products. 
C)  sense the environment and respond to it in various ways, including movement. 
D)  reproduce. 
E)  capture prey while resisting wave forces. 
A)  extract energy and nutrients from the environment. 
B)  eliminate toxins and metabolic waste products. 
C)  sense the environment and respond to it in various ways, including movement. 
D)  reproduce. 
E)  capture prey while resisting wave forces.

Exam 39: Physiology, Homeostasis, and Temperature Regulation

Which animal is behaving as an endotherm to warm its body?

A squirrel that metabolically maintains its internal temperature during the summer but hibernates during the winter is a(n)

Which characteristic pertains to brown fat?

Which statement is true?

Mammals and birds have scroll-like bones, called turbinates, in their nasal cavities.These are covered by epithelial tissue.As inhaled air is warmed and moistened in the nasal cavity, the surface of the turbinates _______ because of _______.

The maintenance of a relatively constant internal environment is called

The thermal limits for most functions in animal cells range from approximately

Refer to the graph. The Q10 of the reaction shown at A is _______, and the Q10 of the reaction shown at B is _______.

The thermoneutral zone of an endotherm is a

_______ tissue forms the innermost lining of abdominal organs.

Sea urchins attach to rocks and use specialized mouth structures to feed.They have an evolutionary advantage over unicellular planktonic protozoa floating by in that they can more effectively _______ on other organisms and resist the forces of waves.

The value of Q10, which describes the sensitivity of a reaction to temperature, is calculated as the

Compared with "cold" fish, "hot" fish, such as bluefin tuna, keep a higher temperature difference between their body and the surrounding water in part because they

Your tongue includes all four tissue types.Use your knowledge of tissue types and their functions to deduce how each tissue type might help form your tongue.

A chemical reaction has a Q10 of 3.Which rates characterize this reaction?

Which anatomical feature possessed by endotherms reduces heat loss?

In regulatory systems, negative feedback

Refer to the figure. Which of these images is of connective tissue and no other tissue type?

Compared with a planktonic protozoan, a sponge living in the ocean has the advantage of being able to

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Mammals and birds have scroll-like bones, called turbinates, in their nasal cavities.These are covered by epithelial tissue.As inhaled air is warmed and moistened in the nasal cavity, the surface of the turbinates _ because of _.

Refer to the graph. The Q₁₀ of the reaction shown at A is _, and the Q₁₀ of the reaction shown at B is _.

The value of Q₁₀, which describes the sensitivity of a reaction to temperature, is calculated as the

A chemical reaction has a Q₁₀of 3.Which rates characterize this reaction?