Question 1

Epithelial cells of the small intestine contains 500 microvilli.What is the purpose of these microvilli?

Accepted Answer

A)  to increase surface area for food absorption
B)  to beat and move food through the intestines
C)  to contract and move food through the intestines
D)  to release mucus that protects the intestines from infection
E)  to release digestive enzymesF) A) and C)
G) B) and E)

Question 2

Which of the following is caused by a vitamin C deficiency?

Accepted Answer

A)  rickets
B)  blindness
C)  scurvy
D)  pellagra
E)  anemiaF) None of the above
G) A) and B)

Question 3

Organisms must maintain homeostasis of their body temperatures,because when they become too hot

Accepted Answer

A)  cholesterol,glycolipids,glycoproteins,and other lipids of the cell membrane become stiff and prevent fluidity of membranes.
B)  proteins denature and no longer play their roles in cells.
C)  organisms shiver uncontrollably causing weaker bones to fracture.
D)  organisms sweat profusely and lose to much water to naturally regain in a short period of time.
E)  All answers are correct.F) A) and B)
G) A) and C)

Question 4

Fresh water is much more dilute than the cells of a fish,so the animal constantly takes in water at its gills.How would a freshwater fish osmoregulate?

Accepted Answer

A)  It would produce dilute urine and use active transport at the gills to take up salt from the water.
B)  It would drink seawater and use active transport at the gills to get rid of excess salts.
C)  It would drink seawater and use active transport at the gills to take up salt from the water.
D)  It would produce dilute urine and use active transport at the gills to get rid of excess salt from the water.E) C) and D)
F) All of the above

Question 5

Beano is a product containing an enzyme that breaks down complex carbohydrates in beans and other vegetables,thereby reducing gas production when these foods are eaten.Why would humans need to take Beano to avoid gas?

Accepted Answer

A)  If they don't break down the complex carbohydrates,bacteria in their colon will.
B)  If they don't break down the complex carbohydrates,bacteria in their small intestine will.
C)  Complex carbohydrates react with acid in the stomach to produce gas.
D)  Complex carbohydrates react with saliva in the mouth to produce gas.
E)  Complex carbohydrates cannot be broken down and cause constipation.F) C) and D)
G) A) and B)

Question 6

Mammals excrete nitrogen wastes in which of the following?

Accepted Answer

A)  ammonia
B)  urea
C)  nucleotides
D)  uric acid
E)  allatoninF) A) and E)
G) None of the above

Question 7

Animals lose water through evaporation,in feces and in urine.

Accepted Answer

A) True 
 B)False

Question 8

The homeostasis of water in organisms is affected by

Accepted Answer

A)  blood composition.
B)  nutrition.
C)  sweating when internal temperatures are too hot.
D)  All answers are correct.
E)  salt concentrations.F) A) and E)
G) C) and D)

Question 9

Rings of muscle in the digestive tract that can open and close,regulating the movement of food into or out of parts of the digestive system,are

Accepted Answer

A)  rumens.
B)  sphincters.
C)  chymes.
D)  villi.
E)  uvulas.F) A) and D)
G) B) and C)

Question 10

Which of the following organisms is incorrectly matched with its mode of obtaining nutrients?

Accepted Answer

A)  Lions are heterotrophs.
B)  Penguins are heterotrophs.
C)  Spiders are heterotrophs.
D)  Redwood trees are autotrophs.
E)  Termites are autotrophs.F) A) and E)
G) A) and B)

Question 11

Anorexia nervosa is an eating disorder in which a person is starving because they refuse to eat enough to maintain a normal body weight.

Accepted Answer

A) True 
 B)False

Question 12

The primary functional unit of a kidney is the nephron.

Accepted Answer

A) True 
 B)False

Question 13

An organism that manages its temperature by its own metabolism is termed a(n)

Accepted Answer

A)  homotherm.
B)  ectotherm.
C)  endotherm.
D)  positherm.
E)  thermophilE.F) None of the above
G) A) and C)

Question 14

The functional unit of a kidney is a

Accepted Answer

A)  neuron.
B)  ureter.
C)  nephron.
D)  collecting duct.
E)  sphincter.F) B) and C)
G) A) and E)

Question 15

An organism that alters its behavior to manage the gain of heat from or loss of heat to the environment is termed a(n)

Accepted Answer

A)  homotherm.
B)  endotherm.
C)  positherm.
D)  ectotherm.
E)  thermophilE.F) D) and E)
G) B) and E)

Question 16

The trace mineral iron is necessary in humans for the transport of oxygen by hemoglobin molecules.

Accepted Answer

A) True 
 B)False

Question 17

The function of bile is to

Accepted Answer

A)  digest proteins.
B)  digest carbohydrates.
C)  emulsify fats.
D)  digest nucleotides.
E)  emulsify proteins.F) B) and D)
G) B) and C)

Question 18

In the section "Investigating Life: Sniffing Out the Origin of Feathers",which of the following is true of endotherms in comparison to ectotherms?

Accepted Answer

A)  They have a higher metabolic rate and oxygen consumption.
B)  They have a lower metabolic rate and oxygen consumption.
C)  They have a higher metabolic rate and lower rate of oxygen consumption.
D)  They have a lower metabolic rate and higher rate of oxygen consumption.
E)  They have equal metabolic rate and oxygen consumption.F) A) and E)
G) All of the above

Question 19

Which of the following are endothermic?

Accepted Answer

A)  mammals only
B)  birds only
C)  reptiles only
D)  both birds and mammals
E)  both reptiles and birdsF) C) and D)
G) A) and E)

Question 20

A reptile

Accepted Answer

A)  is endothermic and has a body temperature that fluctuates as the animal derives its heat from the environment.
B)  is ectothermic and has a body temperature maintained by its own metabolism.
C)  is ectothermic and has a body temperature that fluctuates as the animal derives its heat from the environment.
D)  is endothermic and has a body temperature maintained by its own metabolism.E) All of the above
F) B) and C)

Exam 28: Regulating Temperature, nutrients, and Body Fluids

An organism that alters its behavior to manage the gain of heat from or loss of heat to the environment is termed a(n)

Correct AnswerverifiedShow Answer

A reptile

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The trace mineral iron is necessary in humans for the transport of oxygen by hemoglobin molecules.

Correct AnswerverifiedShow Answer

Fresh water is much more dilute than the cells of a fish,so the animal constantly takes in water at its gills.How would a freshwater fish osmoregulate?

Correct AnswerverifiedShow Answer

The homeostasis of water in organisms is affected by

Correct AnswerverifiedShow Answer

Beano is a product containing an enzyme that breaks down complex carbohydrates in beans and other vegetables,thereby reducing gas production when these foods are eaten.Why would humans need to take Beano to avoid gas?

Correct AnswerverifiedShow Answer

An organism that manages its temperature by its own metabolism is termed a(n)

Correct AnswerverifiedShow Answer

Which of the following is caused by a vitamin C deficiency?

Correct AnswerverifiedShow Answer

The functional unit of a kidney is a

Correct AnswerverifiedShow Answer

The function of bile is to

Correct AnswerverifiedShow Answer

Which of the following organisms is incorrectly matched with its mode of obtaining nutrients?

Correct AnswerverifiedShow Answer

Mammals excrete nitrogen wastes in which of the following?

Correct AnswerverifiedShow Answer

Rings of muscle in the digestive tract that can open and close,regulating the movement of food into or out of parts of the digestive system,are

Correct AnswerverifiedShow Answer

Organisms must maintain homeostasis of their body temperatures,because when they become too hot

Correct AnswerverifiedShow Answer

Anorexia nervosa is an eating disorder in which a person is starving because they refuse to eat enough to maintain a normal body weight.

Correct AnswerverifiedShow Answer

Which of the following are endothermic?

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Epithelial cells of the small intestine contains 500 microvilli.What is the purpose of these microvilli?

Correct AnswerverifiedShow Answer

Animals lose water through evaporation,in feces and in urine.

Correct AnswerverifiedShow Answer

In the section "Investigating Life: Sniffing Out the Origin of Feathers",which of the following is true of endotherms in comparison to ectotherms?

Correct AnswerverifiedShow Answer

The primary functional unit of a kidney is the nephron.

Correct AnswerverifiedShow Answer

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