Digestion

Question 1

Digestive system includes:

Answer 1

-GI tract (Mouth, Pharynx, stomach, small and large intestines)

-Lumen ( Space inside tube where food is)

-Accessory organs (Salivary glands, liver, pancreas)

Question 2

Digestive System- 5 functions

Answer 2

1. Mechanical processing and movement:
2. Secretion
3. Digestion

4.Absorption

5.Elimination

Question 3

Two types of Motility

Answer 3

Peristalsis: Propels food forward

Segmentation: Mixes food, saliva, stomach acid

Question 4

Types of teeth

Answer 4

incisors
canines
premolars
molars

Question 5

How many teeth are in children and adults

Answer 5

Children: 20 teeth

Adults: 32 permanent teeth

Question 6

Position and tastes food

Answer 6

Tongue

Question 7

What are 2 swallowing phases

Answer 7

voluntary phase: tongue pushes bolus of food into pharynx (throat)

involuntary phase: swallowing reflex

Question 8

common passageway for air and food.

Answer 8

Pharynx

Question 9

closes airway temporarily so food will not enter the trachea.

Answer 9

Epiglottis

Question 10

Food passes through __ and___ into the stomach.

Answer 10

esophagus; lower esophageal sphincter

Question 11

Specific stomach cells that secrete gastric juice

Answer 11

Hydrochloric acid (HCl):
breaks down large bits of food

Mucus:
protects stomach lining from acid

Pepsinogen:
converted to pepsin by acid in order to digest proteins

Question 12

Digest proteins

Answer 12

Proteases

Question 13

Digests starch

Answer 13

Amylase

Question 14

Digests lipids

Answer 14

Lipases

Question 15

concentrates and stores bile

Answer 15

Gallbladder

Question 16

-produces bile to aid digestion and absorption of lipids

-primary organ for metabolism

Answer 16

Liver