$$\Delta [\text{glucose}]_{\text{blood}} = [\text{glucose}]_{\text{after meal}} - [\text{glucose}]_{\text{after insulin}}$$

Question 1

Which of the following best describes the initial synthesis of insulin in pancreatic β-cells?

Accepted Answer

It is synthesized in three parts and then assembled for storage.

Question 2

Insulin is classified as a peptide hormone. Which signaling pathway does it primarily utilize?

Accepted Answer

Receptor tyrosine kinase (RTK) pathway

Question 3

After a meal, insulin generates three primary biological effects. Which of the following is NOT one of these effects?

Accepted Answer

Stimulates the production of carbon leaf molecules

Question 4

Which equation best represents the effect of insulin on blood glucose concentration?

Accepted Answer

$$\Delta [	ext{glucose}]_{	ext{blood}} = [	ext{glucose}]_{	ext{after meal}} - [	ext{glucose}]_{	ext{after insulin}}$$

Question 5

Insulin stimulates the uptake of glucose into cells. Which transporter is primarily responsible for this effect?

Accepted Answer

GLUT4

Question 6

Which of the following is a direct effect of insulin on gene expression?

Accepted Answer

It increases cell growth by regulating gene expression.

Question 7

A patient with insulin deficiency would most likely exhibit which of the following symptoms?

Accepted Answer

Increased blood glucose levels

Question 8

Insulin acts as a growth factor to stimulate cell growth. Which pathway is most directly involved in this process?

Accepted Answer

MAPK/ERK pathway

Question 9

Which of the following is NOT an effect of insulin on lipid metabolism?

Accepted Answer

Increases the storage of energy by converting fatty acids to energy

Question 10

Insulin promotes the movement of glucose from the blood into cells. Which process is most directly responsible for this effect?

Accepted Answer

Facilitated diffusion via GLUT4 transporters

Question 11

Which of the following statements about insulin is TRUE?

Accepted Answer

Insulin decreases the concentration of blood glucose.

Question 12

Which of the following is a function of insulin as a growth factor?

Accepted Answer

Stimulates cell division and tissue repair

Question 13

Insulin can function as which of the following?

Accepted Answer

Growth factor

Question 14

Which of the following is the primary function of the peptide insulin?

Accepted Answer

To stimulate the transport of glucose out of the bloodstream and into the cell

Question 15

Which of the following is NOT a biological effect of insulin after eating a large meal?

Accepted Answer

Stimulates the production of carbon leaf molecules

Question 16

Insulin increases lipid synthesis. Which of the following is a direct effect of this process?

Accepted Answer

Activates regulatory proteins that inhibit breakdown of fatty acids

Question 17

Which of the following is a plausible consequence of insulin resistance in muscle cells?

Accepted Answer

Decreased uptake of glucose from the blood

Question 18

Which of the following best describes the role of insulin in the regulation of blood glucose after a meal?

Accepted Answer

Insulin decreases blood glucose by promoting cellular uptake.

Question 19

Which of the following is a multi-step effect of insulin on metabolism?

Accepted Answer

Insulin binds to its receptor, activates RTK signaling, and increases glucose uptake via GLUT4.

Question 20

Which of the following is NOT an effect of insulin?

Accepted Answer

Stimulates the release of potassium from the pancreas

Insulin: Structure, Function, and Biological Effects

Study Guide - Practice Questions