Many human body systems must interact to maintain homeostasis. Which of the following is an example of the nervous and respiratory systems interacting? (A) toxic molecules cross blood vessel membranes

(B) released enzymes reduce the exchange of gases

(C) coordinated muscle movements control breathing

(D) increased carbon dioxide levels improve digestion

C.

Explanation:

carbohydrates are the body's preferred source of energy.

the abdomen (less formally called the belly, stomach, tummy or midriff) constitutes the part of the body between the thorax (chest) and pelvis, in humans and in other vertebrates. the region occupied by the abdomen is termed the abdominal cavity. the stomach secretes acid and enzymes that digest food. ridges of muscle tissue called rugae line the stomach. the stomach muscles contract periodically, churning food to enhance digestion. the pyloric sphincter is a muscular valve that opens to allow food to pass from the stomach to the small intestine.