1. Describe how the PNS affects the digestive tract, and name the major nerve responsible. 2. Give two reasons why it is important to control the rate of flow of chyme through the digestive tract. c....

1. Describe how the PNS affects the digestive tract, and name the major nerve responsible.

2. Give two reasons why it is important to control the rate of flow of chyme through the digestive tract. c. State the source and purpose of gastrin.

3. State the final form in which carbohydrate and protein are absorbed into the blood.

4. Describe three general ways in which absorption of nutrients could be impaired.