Digestive System

Question 1

Muscular tube extends…

Answer 1

From oral cavity to anus

Question 2

Another name for digestive tract?

Answer 2

GI Tract Alimentary canal

Question 3

4 layers of digestive tract:

Answer 3

1) Mucosa
2) Submucosa
3) Muscularis externa
4) Serosa : Visceral Peritoneum

Question 4

Mucosa

Answer 4

Inner lining of digestive tract
Contains epithelium + lamina propria
Aids in secretion and absorption

Question 5

Lamina Propria

Answer 5

Loose areolar connective tissue in mucosa along with Muscularis mucosae
Arranged in two concentric layers

Question 6

Submucosa

Answer 6

Dense, irregular connective tissue with large blood vessels

Question 7

Muscularis externae

Answer 7

Has smooth muscle cells, arranged in an inner circular layer with a longitudinal outer layer

Question 8

Peristalsis

Answer 8

Waves of muscular contractions (using both inner circular and longitudinal muscles) that move bolus along tract

Question 9

4 types of teeth

Answer 9

Incisors
Cuspid
Bicuspids
Molars

Question 10

Two types of dentition teeth

Answer 10

Primary dentition teeth: 20 temporary teeth

Secondary dentition teeth: 32 permanent teeth

Question 11

3 functions of saliva

Answer 11

Lubricate mouth
Dissolve chemicals that stimulate taste buds
Initiates digestion with salivary amylase

Question 12

What is part of the nervous system and makes mouth water at the thought food?

Answer 12

Parasympathetic.

It accelerates secretion.

Question 13

3 phases of swallowing:

Answer 13

Buccal phase
Pharyngeal phase
Esophageal phase

Question 14

What kind of tissue is located in the esophagus?

Answer 14

Stratified squamous epithelium in the mucosa

Because it deals with roughage

Question 15

Regions of the stomach

Answer 15

Cardia
Fundus
Body
Pylorus

Question 16

Major functions of the stomach

Answer 16

Storage
Mechanical breakdown
Disruption of chemical bonds
Production of intrinsic factor

Question 17

What is intrinsic factor?

Answer 17

Glycoproteins required for absorption of vitamin B12

Question 18

What kind of tissue is in the stomach?

Answer 18

Simple columnar epithelium

Good for secretion

Question 19

What are parietal cells?

Answer 19

Secrete intrinsic factor and hydrochloric acid

Question 20

What is pepsin?

Answer 20

Active enzyme that breaks down protein

Question 21

What is pepsinogen?

Answer 21

An inactive proenzyme.

Needs acidic, or low pH by HCl to convert to pepsin.

Question 22

3 phases of gastric activity:

Answer 22

Cephalic
Gastric
Intestinal

Question 23

3 segments of small intestine:

Answer 23

Duodenum
Jejunum
Ileum

Question 24

Which 2 are retroperitoneal?

Answer 24

Pancreas and duodenum

Question 25

6 Functions of Digestive Tract

Answer 25

Ingestion
Mechanical processing
Digestion / Chemical Breakdown of food
Secretion
Absorption
Excretion

Question 26

What is intrinsic factor?

Answer 26

A glycoproteins required for absorption of vitamin B12