Question 1

Refer to the figure.   If you scrape your knuckle, you will damage tissue shown in A, called _______.

Accepted Answer

stratified

Question 2

Which statement about muscle tissue is false?

Accepted Answer

A)  It consists of cells that can contract. 
B)  It is an 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 types. 
A)  It consists of cells that can contract. 
B)  It is an 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 types.

Question 3

Refer to the graph.   Draw a line on the graph showing the lizard's predicted body temperature based on your knowledge of how ectotherms regulate their temperature with behavior.Explain why the line looks the way it does.

Accepted Answer

See the answer figur

Question 4

Refer to the graph showing body temperature and heart rate in the Galápagos marine iguana as it moves from feeding in the ocean to basking on hot rocks on shore.   If you saw a Galápagos marine iguana sunning itself for over an hour on warm rocks, you would expect its body temperature to be around _______ and its heart rate to be around _______.

Accepted Answer

40°C; 70 b

Question 5

Homeostasis refers to the tendency

Accepted Answer

A)  to keep body systems matched to the external environment. 
B)  to keep body systems the same relative to one another. 
C)  for body systems to vary in activity to keep the internal environment constant. 
D)  for body systems to be under the control of the brain. 
E)  for all body systems to be at the same specific temperature. 
A)  to keep body systems matched to the external environment. 
B)  to keep body systems the same relative to one another. 
C)  for body systems to vary in activity to keep the internal environment constant. 
D)  for body systems to be under the control of the brain. 
E)  for all body systems to be at the same specific temperature.

Question 6

A high school cross-country runner ignores her coach's rule about drinking water and taking breaks regularly.She overheats and collapses.The paramedics that come to her aid will most likely

Accepted Answer

A)  wrap her in warm blankets. 
B)  have a hard time treating her because she will be shivering violently to regulate her temperature. 
C)  give her an aspirin to lower her body temperature. 
D)  use external cooling methods such as spraying her with cold water to lower her temperature below 40°C to avoid organ failure. 
E)  have her get up and move around to improve her circulation. 
A)  wrap her in warm blankets. 
B)  have a hard time treating her because she will be shivering violently to regulate her temperature. 
C)  give her an aspirin to lower her body temperature. 
D)  use external cooling methods such as spraying her with cold water to lower her temperature below 40°C to avoid organ failure. 
E)  have her get up and move around to improve her circulation.

Question 7

Refer to the graph showing body temperature and heart rate in the Galápagos marine iguana as it moves from feeding in the ocean to basking on hot rocks on shore.   What is the heart rate of the iguana when its body temperature is 30°C in the ocean and when it is 30°C after coming out on land? How could this change in heart rate be related to the rate of warming of the iguana's body when moving from the water to land?

Accepted Answer

When the iguana's body temperature is 30

Question 8

You are working in a lab and discover a hibernating animal with a mutation that does not allow it to develop brown fat.If this animal were in the wild, what would be the most severe problem it might face?

Accepted Answer

A)  The animal would be unable to mate, because of insufficient lipids to make sex hormones. 
B)  The animal would be very fat because of an increase in white fat tissues. 
C)  The animal would have a very high body temperature due to increased mitochondria. 
D)  The animal would take much longer to return to a high body temperature during arousals from hibernation. 
E)  The animal would die from overheating due to increased production of thermogenin. 
A)  The animal would be unable to mate, because of insufficient lipids to make sex hormones. 
B)  The animal would be very fat because of an increase in white fat tissues. 
C)  The animal would have a very high body temperature due to increased mitochondria. 
D)  The animal would take much longer to return to a high body temperature during arousals from hibernation. 
E)  The animal would die from overheating due to increased production of thermogenin.

Question 9

Red-tailed hawks drop their body temperature at night by 2°C-4°C.This is an example of ________, which is different from the _______ experienced by humans when under anesthesia.

Accepted Answer

A)  torpor; induced unconsciousness 
B)  regulated hypothermia; unregulated hypothermia 
C)  lowered hypothalamic set point; increased hypothalamic set point 
D)  a circadian rhythm; diurnal rhythm 
E)  ectothermy; induced ectothermy 
A)  torpor; induced unconsciousness 
B)  regulated hypothermia; unregulated hypothermia 
C)  lowered hypothalamic set point; increased hypothalamic set point 
D)  a circadian rhythm; diurnal rhythm 
E)  ectothermy; induced ectothermy

Question 10

Researchers have found that king penguin chicks can drop the temperature of their internal organs by more than 15°C but then maintain the lower temperature metabolically.These birds can therefore be characterized as

Accepted Answer

A)  varitherms. 
B)  endotherms. 
C)  pyrotherms. 
D)  heterotherms. 
E)  ectotherms. 
A)  varitherms. 
B)  endotherms. 
C)  pyrotherms. 
D)  heterotherms. 
E)  ectotherms.

Question 11

In humans, prolactin is involved in the production of milk from the breast.When a mother is breastfeeding, the suckling of the baby on the nipple sends a nerve response to the mother's brain, which stimulates the pituitary gland to secrete more prolactin.This, in turn, causes more milk to be produced.This is an example of

Accepted Answer

A)  feedforward information. 
B)  positive feedback. 
C)  negative feedback. 
D)  endothermy. 
E)  heterothermy. 
A)  feedforward information. 
B)  positive feedback. 
C)  negative feedback. 
D)  endothermy. 
E)  heterothermy.

Question 12

At the end of the summer you notice that a cool breeze signaling the approach of autumn is actually at a temperature that felt warm when you encountered it the previous winter.Which hypothesis best explains this observation?

Accepted Answer

A)  Day length influences one's sensation of temperature. 
B)  Winter breezes are weaker than those in autumn. 
C)  Nerve cells of the skin die off during winter. 
D)  We acclimatize to temperature. 
E)  Our muscles are creating more heat in winter. 
A)  Day length influences one's sensation of temperature. 
B)  Winter breezes are weaker than those in autumn. 
C)  Nerve cells of the skin die off during winter. 
D)  We acclimatize to temperature. 
E)  Our muscles are creating more heat in winter.

Question 13

Refer to the figure.   Two tissues you would find in your lungs are shown in _______.

Accepted Answer

The answer of Refer to the figure.   Two...

Question 14

Which characteristic would you expect to find in endotherms living in colder climates compared with their close relatives living in warmer climates?

Accepted Answer

A)  Larger surface area-to-volume ratios 
B)  Rounder body shapes 
C)  Longer appendages 
D)  Less body fat 
E)  Ability to increase blood flow to the skin 
A)  Larger surface area-to-volume ratios 
B)  Rounder body shapes 
C)  Longer appendages 
D)  Less body fat 
E)  Ability to increase blood flow to the skin

Question 15

Which statement is correct?

Accepted Answer

A)  An organ is composed of an epithelium and one or more other kinds of tissues. 
B)  An organ performs a specific function and is composed of a single type of tissue. 
C)  Some tissues are acellular. 
D)  Collagen is a type of tissue. 
E)  Blood is not a tissue, because it is fluid. 
A)  An organ is composed of an epithelium and one or more other kinds of tissues. 
B)  An organ performs a specific function and is composed of a single type of tissue. 
C)  Some tissues are acellular. 
D)  Collagen is a type of tissue. 
E)  Blood is not a tissue, because it is fluid.

Question 16

The elephant is better adapted to the temperatures of tropical habitats than those of polar climates because of its

Accepted Answer

A)  sparse hair. 
B)  large size. 
C)  stocky appendages. 
D)  long tusks. 
E)  thick skin. 
A)  sparse hair. 
B)  large size. 
C)  stocky appendages. 
D)  long tusks. 
E)  thick skin.

Question 17

Which statement about positive feedback is true?

Accepted Answer

A)  It is more commonly observed than negative feedback. 
B)  It tends to reach a limit and terminate slowly. 
C)  It diminishes a response. 
D)  A thermostat regulating a furnace is 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 slowly. 
C)  It diminishes a response. 
D)  A thermostat regulating a furnace is an example of positive feedback. 
E)  Sexual behavior is an example of positive feedback.

Question 18

Which statement is true?

Accepted Answer

A)  Thermogenin uncouples proton movement from production of ATP. 
B)  In humans, brown fat is found in babies but not adults. 
C)  During nonshivering heat production, metabolic fuels are consumed and heat is released by production of ATP. 
D)  Thermogenin is a protein found in the brown fat cells of birds and mammals. 
E)  Brown fat occurs only in mammals that hibernate. 
A)  Thermogenin uncouples proton movement from production of ATP. 
B)  In humans, brown fat is found in babies but not adults. 
C)  During nonshivering heat production, metabolic fuels are consumed and heat is released by production of ATP. 
D)  Thermogenin is a protein found in the brown fat cells of birds and mammals. 
E)  Brown fat occurs only in mammals that hibernate.

Question 19

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 begins at its upper critical temperature and decreases by 3°C-5°.

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

Question 20

The metabolic rate of a resting endotherm at a temperature within the thermoneutral zone is called the _______ metabolic rate.

Accepted Answer

The answer of The metabolic rate of a resting endotherm...

Exam 39: Physiology, Homeostasis, and Temperature Regulation

Refer to the figure. If you scrape your knuckle, you will damage tissue shown in A, called _______.

Which statement about muscle tissue is false?

Refer to the graph. Draw a line on the graph showing the lizard's predicted body temperature based on your knowledge of how ectotherms regulate their temperature with behavior.Explain why the line looks the way it does.

Homeostasis refers to the tendency

A high school cross-country runner ignores her coach's rule about drinking water and taking breaks regularly.She overheats and collapses.The paramedics that come to her aid will most likely

You are working in a lab and discover a hibernating animal with a mutation that does not allow it to develop brown fat.If this animal were in the wild, what would be the most severe problem it might face?

Red-tailed hawks drop their body temperature at night by 2°C-4°C.This is an example of ________, which is different from the _______ experienced by humans when under anesthesia.

Researchers have found that king penguin chicks can drop the temperature of their internal organs by more than 15°C but then maintain the lower temperature metabolically.These birds can therefore be characterized as

At the end of the summer you notice that a cool breeze signaling the approach of autumn is actually at a temperature that felt warm when you encountered it the previous winter.Which hypothesis best explains this observation?

Refer to the figure. Two tissues you would find in your lungs are shown in _______.

Which characteristic would you expect to find in endotherms living in colder climates compared with their close relatives living in warmer climates?

Which statement is correct?

The elephant is better adapted to the temperatures of tropical habitats than those of polar climates because of its

Which statement about positive feedback is true?

Which statement is true?

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 begins at its upper critical temperature and decreases by 3°C-5°.

The metabolic rate of a resting endotherm at a temperature within the thermoneutral zone is called the _______ metabolic rate.

Studying Life

Small Molecules and the Chemistry of Life

Proteins, Carbohydrates, and Lipids

Nucleic Acids and the Origin of Life

Cells: the Working Units of Life

Cell Membranes

Cell Communication and Multicellularity

Energy, Enzymes, and Metabolism

Pathways That Harvest Chemical Energy

Photosynthesis: Energy From Sunlight

The Cell Cycle and Cell Division

Inheritance, Genes, and Chromosomes

Dna and Its Role in Heredity

From Dna to Protein: Gene Expression

Gene Mutation and Molecular Medicine

Regulation of Gene Expression

Genomes

Recombinant Dna and Biotechnology

Mechanisms of Evolution

Reconstructing and Using Phylogenies

Speciation

Evolution of Genes and Genomes

The History of Life on Earth

Bacteria, Archaea, and Viruses

The Origin and Diversification of Eukaryotes

Plants Without Seeds: From Water to Land

The Evolution of Seed Plants

The Evolution and Diversity of Fungi

Animal Origins and the Evolution of Body Plans

Protostome Animals

Deuterostome Animals

The Plant Body

Transport in Plants

Plant Nutrition

Regulation of Plant Growth

Reproduction in Flowering Plants

Plant Responses to Environmental Challenges

Animal Hormones

Immunology: Animal Defense Systems

Animal Reproduction

Animal Development

Neurons, Glia, and Nervous Systems

Sensory Systems

The Mammalian Nervous System: Structure and Higher Functions

Musculoskeletal Systems

Gas Exchange

Circulatory Systems

Nutrition, Digestion, and Absorption

Salt and Water Balance and Nitrogen Excretion

Animal Behavior

The Physical Environment and Biogeography of Life

Populations

Species Interactions

Communities

Ecosystems

A Changing Biosphere

Filters

Red-tailed hawks drop their body temperature at night by 2°C-4°C.This is an example of __, which is different from the _ experienced by humans when under anesthesia.