Deck 57: Metabolism

Question 1

The majority of energy expended by the body is heat.

Answer 1

True

Question 2

Which of the following is not true of heat production and body temperature regulation in a person?

A) The higher the surface area to volume ratio in a person, the less heat escapes into the environment.
B) The greater the number of cells that a person has, the more heat is produced by the person.
C) Most heat loss occurs through the skin surface.
D) People and other warm-blooded animals must have proper methods of heat production and heat loss to keep their body temperature at its homeostatic level.
E) All of these are true of heat production and body temperature regulation in warm-blooded animals.

Answer 2

A

Question 3

In the catabolic pathways of dietary nutrients, which step(s) produce(s) no ATP?

A) Krebs cycle
B) Oxidative phosphorylation
C) Glycolysis and the Krebs cycle
D) Glycolysis
E) ATP is produced in all of the steps in the catabolic pathways of dietary nutrients.

Answer 3

E

Question 4

Indirect calorimetry measures

A) oxygen consumption.
B) the amount of food consumed.
C) the amount of carbon dioxide produced.
D) the amount of heat produced.
E) the amount of ATP produced.

Question 5

In general, a small, thin person has a higher metabolic rate than a large, heavy person.

Question 6

Which of the following is not a product of aerobic food catabolism?

A) Carbon dioxide
B) ATP
C) Water
D) Heat
E) All of these are products of aerobic food catabolism.

Question 7

Which of the following is not true of the conditions used to measure basal metabolic rate?

A) The person is awake and relaxed.
B) The person has not exercised for at least an hour.
C) The person is in a brightly lit room with a cool temperature.
D) The person has not eaten for 12-14 hours.
E) All of these are true of the conditions used to measure basal metabolic rate.

Question 8

Anabolic reactions release energy, while catabolic reactions use energy.

Question 9

In which step(s) of the catabolism of nutrients is/are oxygen directly consumed?

A) Krebs cycle
B) Oxidative phosphorylation
C) Krebs cycle and oxidative phosphorylation
D) Glycolysis
E) Glycolysis and the Krebs cycle

Question 10

Oxygen consumption is normally directly proportional to metabolic rate.

Question 11

A direct calorimeter measures heat produced in units of

A) kcal/L of oxygen.
B) kcal/g of body weight.
C) kcal/min.
D) kcal/L of carbon dioxide.
E) kcal/body weight/hour.

Question 12

Metabolism is the sum of all of the chemical reactions within cells that release energy.

Question 13

In general, a person of higher weight consumes more energy (kcal/min) than a person of lower weight, when performing the same type of exercise at the same rate.

Question 14

Urea is derived from the breakdown of

A) glycerol.
B) amino acids.
C) pyruvate.
D) fatty acids.
E) glucose.