Grand Tour of Alimentary Canal

Question 1

What are the four functions of the digestive system

Answer 1

Digestion
Secretion
Absorption
Motility

Question 2

What are the four layers of membranes

Answer 2

Mucosa, Submucosa , Muscularis Externa, Serosa ( Below DIaphragm), Adventitia (Above diaphragm)

Question 3

What are the three layers of mucosa

Answer 3

epithelium, lamina propria,muscularis mucosae

Question 4

what are the myenteric and submucosal plexuses called

Answer 4

Intramural Plexus

Question 5

What structures have stratified squamous epithelium

Answer 5

Mouth, Oesophagus and anal canal

Question 6

What structures have simple columnar epithelium

Answer 6

Stomach, small and large intestine

Question 7

What does the epithelium synthesis and secrete

Answer 7

Digestive enzymes,mucus,hormones

Question 8

What does the Lamina Propria contain

Answer 8

glands,blood and lymph vessels

Question 9

Muscularis mucosae function?

Answer 9

Thin smooth muscle layers

Question 10

Submucosa contains nerves and an extensive neural network called:

Answer 10

Submucosal plexus

Question 11

Where are submucosal glands found

Answer 11

oesophagus and duodenum

Question 12

What is the muscularis externa made of

Answer 12

Inner layer ( circular muscle 
Outer layer (Longitudinal muscle)
-Produces motility, peristalsis,segmentation

Question 13

What is found bw circular and longitudinal muscle

Answer 13

Myenteric plexus

Question 14

What do submucosal + Myenteric plexuses form?

Answer 14

Enteric nervous system (ENS)

Question 15

What autonomic control does the GI system have

Answer 15

Long (parasympathetic) and short (ENS) reflexes

Question 16

What parasympathetic control does the GI syste have

Answer 16

Vagus nerve ( Cranial nerve X) 
Except salivation which is controlled by Facial (VII) and glossopharyngeal (IX) nerves

Question 17

Sympathetic system controlled by?

Answer 17

Splanchic nerve.

-Controls salivation but of a different consistency

Question 18

Coeliac trunk supplies:

Answer 18

Stomach,Small intestine, pancreas, Liver

Question 19

Superior mesenteric artery supplies:

Answer 19

Small Intestine, Caecum, Ascending colon, Transverse colon

Question 20

Inferior mesenteric artery supplies:

Answer 20

Descending colon, Sigmoid colon, Rectum

Question 21

Hepatic portal vein forms by:

Answer 21

Junction of splenic vein and superior mesenteric vein