Question

question 11 of 20 : select the best answer for the question 11. when sleeping overnight, a person doesnt eat for many hours and blood sugar decreases. how does negative feedback work to affect this physiological value in a healthy person? a. glucagon is released to cause cells to release glucose into the bloodstream b. glucagon is released to cause cells to absorb glucose from the bloodstream c. insulin is released to cause cells to absorb glucose from the bloodstream d. insulin is released to cause cells to release glucose into the bloodstream mark for review (will be highlighted on the review page) << previous question next question >>

Explanation:

To solve this, we analyze the roles of glucagon and insulin in blood sugar regulation:

• Insulin lowers blood sugar by promoting cells to absorb glucose.
• Glucagon raises blood sugar by prompting cells (like liver cells) to release stored glucose into the bloodstream.

When blood sugar decreases (as during overnight fasting), the negative feedback system triggers glucagon release. Option A says glucagon is released to cause cells to release glucose into the bloodstream, which matches its role. Option B is wrong because glucagon doesn't cause cells to absorb glucose. Options C and D are wrong because insulin is for lowering blood sugar, not raising it when blood sugar is low.

Answer:

A. Glucagon is released to cause cells to release glucose into the bloodstream