Question

Which of the following describes a negative feedback loop?

When the heart rate is too high, the body releases hormones that continually increase the heart rate higher.
When a pregnant woman is in labor, the body releases hormones that increase the intensity of contractions, which then increases the secretion of the same hormones.
When blood sugar concentration is above normal, the endocrine system releases hormones that lower the blood sugar concentration until it reaches a normal level, and the release of the hormones slows.
When a person is jogging, the body releases hormones that continually decrease the rate of oxygen supply to the legs.

Answer 1

Answer: Blood sugar

Explanation: This is a popular example of a negative feedback loop since the body is returning to normal levels from increased levels.

Answer 2

Answer is C (blood sugar)

Step-by-step explanation:

Negative feedback loops help the disturbed variable go back to its usual value (this helps maintain homeostasis). The rest seem like positive feedback loops. Hope this helps!