Digestive system processes Flashcards
1
Q
What are the different digestive processes that occur?
A
- Propulsion.
- Chemical digestion.
- Mechanical digestion.
- Absorption.
2
Q
What is the definition of digestion?
A
The chemical or mechanical process of breaking down foods into substances that can be absorbed.
3
Q
What is absorption?
A
The process by which products of digestion pass through the GI tract into blood and lymph.
4
Q
What is mechanical digestion?
A
- Includes chewing in the mouth.
- Churning in the stomach.
- Segmentation in the small intestine.
5
Q
What is peristalsis?
A
- A mechanical mechanism.
- Moves food through the digestive tract.
- With alternating waves of muscle contraction + relaxation.
6
Q
What is chemical digestion?
A
Digestive juices carry out chemical digestion.
7
Q
What do the salivary glands in the mouth secrete to perform chemical digestion?
A
Salivary amylase breaks down carbohydrates.
8
Q
What does the stomach secrete to perform chemical digestion?
A
Pepsin and hydrochloric acid break down proteins.
9
Q
What does the intestine secrete to perform chemical digestion?
A
- Bile.
- Pancreatic juice.
- Intestinal wall enzymes.
