PRACTICE QUESTIONS

1. All the following are metabolites that can be oxidized for fuel in the animal body. Which one is not important in the transport of energy between organs and organ systems?

a.

b. Ketone bodies

c. Oxaloacetic acid

d. Nonesterified fatty acids

e. Amino acids

2. Which of the following reactions is not characteristic of the absorptive phase of digestion?

a. Hepatic synthesis of glycogen

b. Hepatic uptake of glucose

c. Destruction of dietary amino acid

d. Utilization of muscle-derived amino acid for gluco­neogenesis

e. Hepatic synthesis of triglyceride from glucose

3. Which of the following reactions in the liver could be expected to occur during both the digestive phase and a prolonged fast?

a. Glycogen synthesis

b. Fatty-acid synthesis

c. Ketone body synthesis

d. Ketone body oxidation

e. Triglyceride synthesis from fatty acids

4. Which of the following statements is true of both ketone bodies and Iionesterified fatty acids?

a. They are water soluble.

b. They provide energy for muscle metabolism.

c. They circulate in blood bound to albumin.

d. They can provide energy to the brain.

e. They are formed exclusively in the liver.

5. Which of the following amino acids is not extensively Catabolized by the liver?

a. Valine

b. Alanine

c. Glutamine

d. Asparagine

e. Glycine