Estrogen and testosterone are hormones that initiate body development during puberty. The body fat accumulated is usually stored as energy for long periods of time. Based on this information, estrogen and testosterone can be identified as: Lipids
Carbohydrates
Proteins
Nucleic acids

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.