Exam 5 Study Guide

Question 0

The GI tract involves

Answer 0

The GI tract involves the mouth, stomach, small intestine, large intestine, all the way to the anus. The GI tract digests almost all of the nutrients consumed. (92-97%), which include Carbs, fats, proteins, fluids, vitamins, minerals.
The liver contributes bile, Pancreas contributes Lipase and adds enzymes to continue break down, mesentery contributes o2 and nutrients and eliminates waste

Question 1

1. Know the secretory cells of the stomach (those we covered in class), what they produce, their job and the effects that you may see if you have damage to those cells.

Answer 1

Mucus cells - prostaglandins line the whole stomach.stimulates mucus and initiates bicarbonate. And secrete them to create a protective barrier against acidic conditions.

Parietal cells - Located in walls of gastric pits. They secrete HCL and intrinsic factor. HCL activates pepsinogen and it turns to pepsin.Alcoholism can damage parietal cells, and you can get pernicious anemia. (inability to absorb b12).

G cells - gastrin help smooth muscle contraction, stimulates pepsinogen. (does not produce it). Stimulates acid secretion and motility. (segmentation).

Chief Cells –secrete Pepsinogen. Initiates breakdown of food.

Question 2

The liver, pancreas and mesentery contributes

Answer 2

The liver contributes bile, Pancreas contributes Lipase and adds enzymes to continue break down, mesentery contributes o2 and nutrients and eliminates waste