Question

"The energy necessary to perform this function comes directly from the

(1)exchange of H2O and O2 during respiration
(2)blood flowing through the organs
(3)ATP molecules produced during cellular respiration
(4)water that is eliminated by the organs"

Answer 1

The energy needed for biological functions comes from ATP molecules produced during cellular respiration (Option 3), involving the digestive, cardiovascular, and respiratory systems.

Step-by-step explanation:

The energy necessary to perform functions in living organisms mainly comes from ATP (adenosine triphosphate) molecules produced during cellular respiration (Option 3). Cellular respiration is an intracellular process that converts glucose and oxygen into carbon dioxide, water, and most importantly, ATP. This process requires the involvement of the digestive, cardiovascular, and respiratory systems. Digestion breaks down food to obtain glucose, while the respiratory system facilitates the exchange of gases, providing oxygen to the body and expelling carbon dioxide. ATP then is used as the main energy source for various biological processes.