"pressure, the difference between the intrapulmonary and intrapleural pressures, prevents the lungs from collapsing."

Which of the following is a macronutrient? carbohydrates lipids amino acids all of the above

What sentence best supports the statement that hormones are involved in the regulation of homeostasis? a. the hormone erythropoeitin increases the production of red blood cells when oxygen levels are low. b. the hormone oxytocin promotes labor contractions of the uterus during childbirth. c. the hormone melatonin induces sleep and its production is slowed by exposure to light. d. the hormone cortisol suppresses the immune system and is produced when the body is under stress.

When plants use sunlight to make food, the energy of sunlight is