Lesson 8: Summary of Macronutrient Metabolism Flashcards Preview

Biochemistry Final Exam > Lesson 8: Summary of Macronutrient Metabolism > Flashcards

Flashcards in Lesson 8: Summary of Macronutrient Metabolism Deck (15):
1

Amino acids can be synthesized from carbohydrates or fats. True or False?

True

2

Both the glycerol and fatty acid components of fat can be converted to carbohydrates. True or False?

False

3

Glucagon

Select one:
a. Stimulates glycolysis
b. Stimulates glycogen synthesis
c. Is secreted in response to raised blood glucose levels
d. Is released by pancreatic beta cells
e. Stimulates gluconeogenesis

b. Stimulates glycogen synthesis

4

Glucose can be used as a precursor for the synthesis of both the glycerol and fatty acid components of triglycerides. True or False?

True

5

Glucose levels in the body must be maintained at a constant level both during meals and in the fasted state. True or False?

True

6

In the fed state, carbohydrates are

Select one:
a. Converted into fatty acids for storage in adipose tissue
b. Stored as glycogen
c. Used to produce nucleotides through the pentose phosphate pathway
d. Broken down through glycolysis to provide energy
e. All of these answers are correct

e. All of these answers are correct

7

Insulin

Select one:
a. Increases glycolysis
b. Enhances triglyceride synthesis
c. Increases the conversion of glucose to glucose-6-phosphate
d. Enhances glycogen synthesis
e. All of these answers are correct

e. All of these answers are correct

8

Insulin causes an increase in the activity of GLUT4 transporters which increase the uptake of glucose into the

Select one:
a. Adipose tissue
b. Liver
c. Muscles
d. Muscle, adipose tissue and liver
e. Muscles and adipose tissue

d. Muscle, adipose tissue and liver

9

Ketone bodies are formed

Select one:
a. During starvation
b. During starvation, diabetes mellitus or when carbohydrate intake is inadequate (with an insufficient calorie intake)
c. During starvation or diabetes mellitus
d. During starvation, diabetes mellitus or when carbohydrate intake is inadequate (even if sufficient calories are consumed)

d. During starvation, diabetes mellitus or when carbohydrate intake is inadequate (even if sufficient calories are consumed)

10

Most dietary fat is transported through the blood by

Select one:
a. Micelles
b. Lipase
c. GLUT4 transporters
d. Chylomicrons
e. GLUT2 transporters

d. Chylomicrons

11

The early fasted state is considered to begin as soon as food is finished being consumed. True or False?

False

12

When excess calories are consumed, which of the following macronutrients are capable of being stored as fat?

Select one:
a. Carbohydrates, lipids and protein
b. Carbohydrates and protein
c. Lipids
d. Carbohydrates and lipids
e. Carbohydrates

a. Carbohydrates, lipids and protein

13

Which amino acids can be used to produce energy?

Select one:
a. Glucogenic amino acids
b. Only alanine
c. Ketogenic amino acids
d. All of the amino acids
e. Only lysine or leucine

d. All of the amino acids

14

Which of the following is the preferred fuel source of red blood cells?

Select one:
a. Any of these macronutrients are used interchangeably
b. Glucose
c. Fatty acids
d. Amino acids
e. Glucose or fatty acids

b. Glucose

15

Which of the following macronutrients are capable of providing the body with the energy that it needs on a short-term basis?

Select one:
a. Lipids
b. All of these answers are correct
c. Carbohydrates and lipids
d. Carbohydrates
e. Protein

b. All of these answers are correct