AP BIOLOGY

Detailed explanation-1: -All of your body’s systems work together maintain homeostasis inside of your body. Homeostasis is achieved by making sure the temperature, pH (acidity), and oxygen levels (and many other factors) are set just right for your cells to survive. Homeostasis levels are different for each species.

Detailed explanation-2: -Homeostasis is highly developed in warm-blooded animals living on land, which must maintain body temperature, fluid balance, blood pH, and oxygen tension within rather narrow limits, while at the same time obtaining nutrition to provide the energy to maintain homeostasis.

Detailed explanation-3: -Animal organs and organ systems constantly adjust to internal and external changes in order to maintain this steady state. Examples of internal conditions maintained homeostatically are the level of blood glucose, body temperature, blood calcium level.

Detailed explanation-4: -Human chorionic gonadotropin hormone (hCG).

Detailed explanation-5: -So, the correct answer is ‘Adrenaline’.