Question 1

In 10°C ocean water, you would expect the tip of a killer whale's flipper to be about

Accepted Answer

A)  37°C. 
B)  8°C. 
C)  12°C. 
D)  45°C. 
A)  37°C. 
B)  8°C. 
C)  12°C. 
D)  45°C.

Question 2

Which of the following is not one of the mechanisms by which animals exchange heat with their environment?

Accepted Answer

A)  Convection 
B)  Evaporation 
C)  Metabolic heat production 
D)  Thermal radiation 
A)  Convection 
B)  Evaporation 
C)  Metabolic heat production 
D)  Thermal radiation

Question 3

At any given temperature, LDH-substrate affinity _______ across species of poikilotherms; at the temperatures at which these species typically live in nature, LDH-substrate affinity _______ across species.

Accepted Answer

A)  varies; varies 
B)  is similar; varies 
C)  varies; is similar 
D)  is similar; is similar 
A)  varies; varies 
B)  is similar; varies 
C)  varies; is similar 
D)  is similar; is similar

Question 4

Dry heat transfer refers to heat exchange

Accepted Answer

A)  by convection only. 
B)  by conduction and convection only. 
C)  by conduction, convection, and thermal radiation. 
D)  in any environment with low humidity. 
A)  by convection only. 
B)  by conduction and convection only. 
C)  by conduction, convection, and thermal radiation. 
D)  in any environment with low humidity.

Question 5

Refer to the figure shown. One species of homeotherm under two different environmental conditions was exposed to temperature changes.
  Which term best describes what was studied in this experiment?

Accepted Answer

A)  Acclimatization 
B)  Metabolic rate 
C)  Heterothermy 
D)  Thermal tolerance 
A)  Acclimatization 
B)  Metabolic rate 
C)  Heterothermy 
D)  Thermal tolerance

Question 6

A 20-kg metal block and a 100-kg metal block are both brought to room temperature, which is 25°C. Choose the correct statement.

Accepted Answer

A)  Both blocks would melt the same amount of ice because their temperatures are the same. 
B)  The 100-kg block will melt more ice because its heat content is higher. 
C)  The 20-kg block will melt more ice because its heat content is higher. 
D)  Both blocks would melt the same amount of ice because their heat contents are the same. 
A)  Both blocks would melt the same amount of ice because their temperatures are the same. 
B)  The 100-kg block will melt more ice because its heat content is higher. 
C)  The 20-kg block will melt more ice because its heat content is higher. 
D)  Both blocks would melt the same amount of ice because their heat contents are the same.

Question 7

What happens to a homeotherm's resting metabolic rate when the temperature is outside its thermoneutral zone?

Accepted Answer

A)  Resting metabolic rate goes up. 
B)  Resting metabolic rate goes down. 
C)  Answer depends on whether it is too hot or too cold. 
D)  Resting metabolic rate does not change. 
A)  Resting metabolic rate goes up. 
B)  Resting metabolic rate goes down. 
C)  Answer depends on whether it is too hot or too cold. 
D)  Resting metabolic rate does not change.

Question 8

Refer to the figure shown. Fish were housed under three different temperature conditions. Their response to acute and chronic temperature changes is plotted on the figure.
  What is the property most likely to be plotted on the y axis?

Accepted Answer

A)  Rate of oxygen consumption 
B)  Mass-specific metabolic rate 
C)  Metabolic rate on a log scale 
D)  Ventilation rate 
A)  Rate of oxygen consumption 
B)  Mass-specific metabolic rate 
C)  Metabolic rate on a log scale 
D)  Ventilation rate

Question 9

The maximum sprinting speeds of lizards

Accepted Answer

A)  are always highest near a body temperature of 40°C. 
B)  are often well-correlated with the average body temperature of the species in nature. 
C)  often peak at lower temperatures. 
D)  are uncorrelated with body temperature. 
A)  are always highest near a body temperature of 40°C. 
B)  are often well-correlated with the average body temperature of the species in nature. 
C)  often peak at lower temperatures. 
D)  are uncorrelated with body temperature.

Question 10

When thermal radiation strikes an object, it is

Accepted Answer

A)  absorbed. 
B)  reflected or absorbed. 
C)  absorbed or transmitted (pass through). 
D)  reflected, absorbed, or transmitted (pass through). 
A)  absorbed. 
B)  reflected or absorbed. 
C)  absorbed or transmitted (pass through). 
D)  reflected, absorbed, or transmitted (pass through).

Question 11

Enzyme-substrate affinity

Accepted Answer

A)  generally decreases with temperature. 
B)  generally increases with temperature. 
C)  does not vary with temperature. 
D)  increases with temperature in eurythermal species but decreases with temperature in stenothermal species. 
A)  generally decreases with temperature. 
B)  generally increases with temperature. 
C)  does not vary with temperature. 
D)  increases with temperature in eurythermal species but decreases with temperature in stenothermal species.

Question 12

You collect lizards from three populations, immediately measure each lizard's metabolic rate at 20°C and find that the rates differ among the lizards. Other than genetic differences among the populations, what factor could these differences be attributed to?

Accepted Answer

The populations may

Question 13

An ectotherm is also called a

Accepted Answer

A)  thermoregulator. 
B)  thermoconformer. 
C)  homeotherm. 
D)  poikilotherm. 
A)  thermoregulator. 
B)  thermoconformer. 
C)  homeotherm. 
D)  poikilotherm.

Question 14

On an overcast night, as opposed to a night with a clear sky, the thermal environment experienced by a desert rodent will be

Accepted Answer

A)  warmer because less radiant heat is lost to an overcast sky. 
B)  warmer because the rodent has lower emissivity when the sky is overcast. 
C)  cooler because the rodent has higher emissivity when the sky is overcast. 
D)  cooler because the atmosphere's convective coefficient is increased by an overcast sky. 
A)  warmer because less radiant heat is lost to an overcast sky. 
B)  warmer because the rodent has lower emissivity when the sky is overcast. 
C)  cooler because the rodent has higher emissivity when the sky is overcast. 
D)  cooler because the atmosphere's convective coefficient is increased by an overcast sky.

Question 15

Some animals can survive freezing and others cannot. Which of the following is associated with the ability of animals to survive freezing?

Accepted Answer

A)  Freezing of the intracellular and extracellular fluids 
B)  Freezing of the intracellular fluids only 
C)  Freezing of the extracellular fluids only 
D)  Their colligative properties 
A)  Freezing of the intracellular and extracellular fluids 
B)  Freezing of the intracellular fluids only 
C)  Freezing of the extracellular fluids only 
D)  Their colligative properties

Question 16

A rete mirabile is

Accepted Answer

A)  a specialized tissue for heat production. 
B)  a part of the body whose temperature differs from the core body temperature. 
C)  the splitting of arteries and veins into many intermingling finer vessels. 
D)  the controller "thermostat" for body temperature. 
A)  a specialized tissue for heat production. 
B)  a part of the body whose temperature differs from the core body temperature. 
C)  the splitting of arteries and veins into many intermingling finer vessels. 
D)  the controller "thermostat" for body temperature.

Question 17

On hot days some dragonflies tip their abdomen and point it directly at the sun. From the perspective of heat exchange, what effect might this have and why?

Accepted Answer

It may reduce heat gain from s

Question 18

Behavioral thermoregulation depends on _______ of the thermal environment and preferential selection of _______ sites within the environment.

Accepted Answer

A)  heterogeneity; particular 
B)  heterogeneity; sunny 
C)  homogeneity; sunny 
D)  homogeneity; particular 
A)  heterogeneity; particular 
B)  heterogeneity; sunny 
C)  homogeneity; sunny 
D)  homogeneity; particular

Question 19

Suppose that due to global climate change, the average minimum air temperature during January increased by 4°C. What would be the likely effect on the northern range limit for birds such as the eastern phoebe?

Accepted Answer

A)  The limit would move farther north to the new ‒4°C isotherm. 
B)  The limit would move farther north to the new 0°C isotherm. 
C)  The limit would move farther north to the new 4°C isotherm. 
D)  The limit would move farther south. 
A)  The limit would move farther north to the new ‒4°C isotherm. 
B)  The limit would move farther north to the new 0°C isotherm. 
C)  The limit would move farther north to the new 4°C isotherm. 
D)  The limit would move farther south.

Question 20

Suppose you use inanimate lizard models to comprehensively and randomly sample the thermal environment of a lizard's habitat. You then compare that distribution of inanimate model temperatures with the distribution of actual body temperatures from lizards in that habitat. If the distributions differ, what does the discrepancy indicate?

Accepted Answer

It indicates that th

Exam 10: Thermal Relations

In 10°C ocean water, you would expect the tip of a killer whale's flipper to be about

Which of the following is not one of the mechanisms by which animals exchange heat with their environment?

At any given temperature, LDH-substrate affinity _______ across species of poikilotherms; at the temperatures at which these species typically live in nature, LDH-substrate affinity _______ across species.

Dry heat transfer refers to heat exchange

Refer to the figure shown. One species of homeotherm under two different environmental conditions was exposed to temperature changes. Which term best describes what was studied in this experiment?

A 20-kg metal block and a 100-kg metal block are both brought to room temperature, which is 25°C. Choose the correct statement.

What happens to a homeotherm's resting metabolic rate when the temperature is outside its thermoneutral zone?

Refer to the figure shown. Fish were housed under three different temperature conditions. Their response to acute and chronic temperature changes is plotted on the figure. What is the property most likely to be plotted on the y axis?

The maximum sprinting speeds of lizards

When thermal radiation strikes an object, it is

Enzyme-substrate affinity

You collect lizards from three populations, immediately measure each lizard's metabolic rate at 20°C and find that the rates differ among the lizards. Other than genetic differences among the populations, what factor could these differences be attributed to?

An ectotherm is also called a

On an overcast night, as opposed to a night with a clear sky, the thermal environment experienced by a desert rodent will be

Some animals can survive freezing and others cannot. Which of the following is associated with the ability of animals to survive freezing?

A rete mirabile is

On hot days some dragonflies tip their abdomen and point it directly at the sun. From the perspective of heat exchange, what effect might this have and why?

Behavioral thermoregulation depends on _______ of the thermal environment and preferential selection of _______ sites within the environment.

Suppose that due to global climate change, the average minimum air temperature during January increased by 4°C. What would be the likely effect on the northern range limit for birds such as the eastern phoebe?

Animals and Environments: Function on the Ecological Stage

Molecules and Cells in Animal Physiology

Genomics, Proteomics, and Related Approaches to Physiology

Physiological Development and Epigenetics

Transport of Solutes and Water

Nutrition, Feeding, and Digestion

Energy Metabolism

Aerobic and Anaerobic Forms of Metabolism

The Energetics of Aerobic Activity

Food, Energy, and Temperature at Work: The Lives of Mammals in Frigid Places

Neurons

Synapses

Sensory Processes

Nervous System Organization and Biological Clocks

Endocrine and Neuroendocrine Physiology

Reproduction

Integrating Systems at Work: Animal Navigation

Control of Movement

Muscle

Movement and Muscle at Work: Plasticity in Response to Use and Disuse

Introduction to Oxygen and Carbon Dioxide in Physiology

External Respiration: the Physiology of Breathing

Transport of Oxygen and Carbon Dioxide in Body Fluids With an Introduction to Acid- Base Physiology

Circulation

Oxygen, Carbon Dioxide, and Internal Transport at Work: Diving by Marine Mammals

Water and Salt Physiology: Introduction and Mechanisms

Kidneys and Excretion With Notes on Nitrogen Excretion

Water, Salts, and Excretion at Work: Mammals of Deserts and Dry Savannas

Water and Salt Physiology of Animals in Their Environments

Filters

At any given temperature, LDH-substrate affinity _ across species of poikilotherms; at the temperatures at which these species typically live in nature, LDH-substrate affinity _ across species.

Behavioral thermoregulation depends on _ of the thermal environment and preferential selection of _ sites within the environment.