The nervous system: a) controls body activities
B) responds to the environment
C) works with all other body systems
D) all of the above
O E) only a and b are true

Which of the following describes a negative feedback loop? when the heart rate is too high, the body sends hormones that continually increase the heart rate higher. when 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. when blood sugar is too low, the body sends hormones that raise blood sugar until it reaches a typical level and hormone secretion slows. when a person is jogging, the body sends hormones that continually decrease the rate of oxygen supply to the legs.

The diagram shows the layers of earth. convection currents in which region influence the movement of tectonic plates

What noticeable trend from this graph might be used to make a conclusion?