which of the following describes a negative feedback loop?\nwhen the heart rate is too high, the body sends…
which of the following describes a negative feedback loop?\nwhen the heart rate is too high, the body sends hormones that continually increase the heart rate higher.\nwhen a pregnant woman is in labor, the body sends hormones that increase the intensity of contractions, which then increases the secretion of the same hormones.\nwhen blood sugar is too low, the body sends hormones that raise blood sugar until it reaches a typical level and hormone secretion slows.\nwhen a person is jogging, the body sends hormones that continually decrease the rate of oxygen supply to the legs.
Answer
Brief Explanations:
A negative - feedback loop is a process where the body's response counteracts the initial change to maintain homeostasis. In the case of blood sugar regulation, when blood sugar is low, the body releases hormones to raise it back to a normal level and then slows hormone secretion once the target level is reached. The first option is a positive - feedback loop as it further increases a high heart rate. The second option (labor) is also a positive - feedback loop as the response amplifies the initial change. The fourth option is incorrect as during jogging, the body should increase oxygen supply to the legs, not decrease it.
Answer:
When blood sugar is too low, the body sends hormones that raise blood sugar until it reaches a typical level and hormone secretion slows.