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.

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