Question

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 body's 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?

Endocrine and nervous

Muscular and excretory

Integumentary and excretory

Respiratory and nervous

Part B
Which statement BEST supports the answer to Part A?

Signals are sent to glands that release chemicals into the blood, leading to the increased absorption of nutrients.

Signals increase muscle contractions, reducing water in the body to improve the absorption of nutrients.

Signals are sent to reduce the intake of oxygen so that nutrients can be more readily absorbed.

Signals open pores in the skin so that excess water can be released, making room for the increased absorption of nutrients.

Answer 1

Part A
The two body systems that are MOST DIRECTLY regulating the digestive system are:
**Endocrine and nervous**

Part B
The statement that BEST supports the answer to Part A is:
**Signals are sent to glands that release chemicals into the blood, leading to the increased absorption of nutrients.**

This statement highlights the role of the endocrine system in hormone release and the nervous system's role in signal transmission, both of which are crucial for regulating the digestive process.