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Flashcards in Digestive system Deck (88)
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1

What are the 3 functions of the digestive system

Nutrient break down
Absorption
Elimination of waste

2

What is the largest salivary gland and produces ~30% of total saliva output

parotid gland

3

Is the parotid gland affected by mumps?

yes; very much so

4

What CN passes through the parotid gland

VII

5

As we age what typically infiltrates our parotid glands

adipose

6

What 3 things does our parotid gland produce?

Salivary amylase (carb break down) & Salivary lipase (fat breakdown)
Lysozyme (antibacterial)
Secretory IgA

7

What smaller salivary gland produces 60% of total salivary output

submandibular gland

8

True or false; the parotid gland produces mucus and serous products

false; it only produces serous

9

True or false; the submandibular gland only produces mucus

false; it produces both mucus and serous products (~80-90% serous)

10

What is the smallest salivary gland that only produces 5% of salivary output

sublingual gland

11

True or false; the sublingual gland is a mixed gland producing both mucus and serous products

true

12

What does the sublingual gland produce more of, serous or mucus products

mucus (80%)

13

What is the function of the esophagus

transfer bolus to stomach from oropharynx

14

What are the 4 luminal wall structures that make up the esophagus

Mucosa
Submucosa
Muscularis externa
Andevtitia/Serosa

15

True or false; the mucosa of the esophagus contains Langerhan cells which are antigen presenting cells with some phagocytosis

true (part of problem with food allergies)

16

What part of the mucosa of the esophagus produces mucus to help movement of food

lamina propria

17

True or false; the muscularis mucosa within the mucosa of the esophagus is a discontinuous layer of longitudinal muscle which is thinner by the pharynx and thicker by stomach

true

18

What is the submucosa of the esophagus made of? What is its primary function

dense fibroelastic ct.

Primary to produce mucus and some serous products (lysozyme and pepsinogen)

19

True or false; the normal pattern of the muscularis externa of the esophagus is a inner circular and outer longitudinal

true

20

Is there a difference between the amount of smooth vs. skeletal muscle in the muscularis externa of the esophagus as you travel to the stomach?

yes; Upper 1/3 all skeletal - Middle 1/3 mixed - Lower 1/3 all smooth

21

True or false; once you pass through the diaphragm the adventitia becomes the serosa

true

22

What are the 2 physiological sphincters associated with the esophagus

Pharyngoesophageal sphincter (between oropharynx and esophagus)
Gastroesophageal sphincter (lower esophageal sphincter)

23

True or false; 2 characteristics of the physiological sphincters of the esophagus are:
No thickening of circular muscle
And pressure gradient aids movement of bolus

true

24

What are the 2 functions of the stomach

breakdown of food
storage

25

What are the 4 luminal wall structures of the stomach

Mucosa
Submucosa
Muscularis Externa
Serosa

26

The surface epithelium in the mucosa of the stomach is made up of simple columnar cells. What function do these cells have

produce thick mucus and release bicarbonate

27

True or false; the mucosa of the stomach is made up of surface epithelium, lamina propria, and muscularis mucosa just like the esophagus

true; though the muscularis mucosa of the stomach has muscle fibers arranged in 3 layers instead of just one discontinuous longitudinal layer like the esophagus

28

How is the smooth muscle of the muscularis mucosa in the mucosa of the stomach arranged

Inner circular
outer longitudinal
outermost circular

29

The submucosa of the stomach is highly vascular and has what function

shut down stomach activity fast

30

True or false; the submucosal (Meissner's) plexus lies next to inner circular layer of muscle

true; this plexus influences the mucosa (secretion, blood flow, movements)