Digestive System #3

Question 1

Small Intestines

Answer 1

Majority of digestion and absorption occurs
- massive surface area
1. Plicae: pleated wall
2. Villi: finger like extensions
3. Microvilli: small finger like

Question 2

Breakdown of food examples
- cheese
- starch
- protein

Answer 2

• Cheese: contains lots of triglyceride (comes in contact with bile and lipas) = glycerol + fatty acids
• Starch: comes in contact with amylase = glucose
• Protein: comes in contact with trypsin = amino acids

Question 3

Large Intestines
- characteristics

Answer 3

• LACKS villi + microvilli + plicae
• has a pouch like structure “stores material”

Question 4

Large Intestines
- functions

Answer 4

1. Absorb water
2. helps eliminate waste + form feeces

Question 5

Types of Digestive Movements

Answer 5

1. Peristalsis
2. Mass movements
3. Haustral churning

• slow transit = constipation
• rapid transit = diarrhea

Question 6

Major Issue with the Colon

Answer 6

1. Colo-Rectal Cancer “colon cancer”: located either in the sigmoid colon or rectum
   - Symptoms:
   - frequent constipation
   - pencil stool
   - bloody stool

Question 7

Common Issues with the entire Digestive System

Answer 7

1. Smooth Muscle:
   aging; atrophy of smooth muscle
   - causes Constipation
   - gastro esophageal reflux = chronic heartburn
   - Diverticulitis: out pockets on haustra