Question

the question has two parts. by sending signals that stimulate the release of hormones, the human brain controls the cycle of digestion, including the processes of nutrient absorption. the brain initiates the release of these hormones at certain times of the day, based on the bodys 24 - hour circadian clock. these hormones then stimulate nutrient absorption. part a based on this information, which two body systems are most directly regulating the digestive system? (a) endocrine and nervous (b) respiratory and nervous (c) muscular and excretory (d) supplementary and excretory part b which statement best supports the answer to part a? (a) signals are sent to glands that release chemicals into the blood, leading to the increased absorption of nutrients. (b) signals are sent to reduce the intake of oxygen so that nutrients can be more readily absorbed. (c) signals increase muscle contractions, reducing water in the body to improve the absorption of nutrients. (d) signals open pores in the skin so that excess water can be released, making room for the increased absorption of nutrients.

Explanation:

For Part A, the text mentions the brain sending signals (nervous system) and hormones (endocrine system) regulating digestion. For Part B, the statement about signals sent to glands that release chemicals (hormones) into the blood to increase nutrient absorption supports the endocrine - nervous system answer from Part A.

Answer:

Part A: A. Endocrine and nervous
Part B: A. Signals are sent to glands that release chemicals into the blood, leading to the increased absorption of nutrients.