Gastrointestinal Physiology Flashcards Preview

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Flashcards in Gastrointestinal Physiology Deck (200)
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1

Endocrine secretions of the intestine

GIP

CCK

Secretin

Gastrin

Glucagon-Like Peptide (GLP)

2

Then enteric nervous system, endocrine cells, paracrine cells and local tissue factors are examples of ___________ control of the GI tract.

Then enteric nervous system, endocrine cells, paracrine cells and local tissue factors are examples of Intrinisic control of the GI tract.

3

Factors that increase blood flow to the GI tract

NO

PSNS Stimulation

4

_________ acts on muscarinic receptors, inhibits Somatostatin and promotes histamine and gastrin.

AcH acts on muscarinic receptors, inhibits Somatostatin and promotes histamine and gastrin.

5

___________ of the GI tract spontaneously depolarizes and repolarizes

Visceral Smooth Muscle of the GI tract spontaneously depolarizes and repolarizes

6

GI: __________: increases the reabsorption of Na+ and increases the secretion of K+, is NOT vasoactive.

Aldosterone: increases the reabsorption of Na+ and increases the secretion of K+, is NOT vasoactive.

7

__________ 

Increases peptic cell secretion

Contraction of LES and pyloric spincter

Increase gastric motility and blood flow

Gastrin

8

_____________ are necessary for digestion.

Hydrolytic Enzymes are necessary for digestion.

9

_________ drugs block histamine receptors

-tidine drugs block histamine receptors

10

In dogs and cats, the pancreas produces ________, which is unlike many other species.

In dogs and cats, the pancreas produces GIF, which is unlike many other species.

11

__________ use water to break bonds

Hydrolytic Enzymes use water to break bonds

12

Peristalsis

Movement in the aborad direction

13

Perfusion of the GI tract is controlled by :

Autonomic Nervous System

Endocrine Secretion

Paracrine Secretion

Local Tissue Factors

14

HCO3 production is (increased/decreased) by prostaglandins

HCO3 production is (increased/decreased) by prostaglandins

15

Preganglionic neurons of the _________ nervous system origniate from the vagus or pelvic nerves to have effect on the GI tract.

Preganglionic neurons of the parasympathetic nervous system origniate from the vagus or pelvic nerves to have effect on the GI tract.

16

__________: increased secretion of HCO3 into the lumen and H into the plasma.

Acid Tide: increased secretion of HCO3 into the lumen and H into the plasma.

17

_____________ of the heart allow the action potential to travel the fastest due to the least resistance.

Perkinje Fibers of the heart allow the action potential to travel the fastest due to the least resistance.

18

Local tissue factors have a ___________ effect on the blood vessels of the Gi tract

Local tissue factors have a vasodilatory effect on the blood vessels of the Gi tract

19

__________ nervous system neurons originates from the craniosacral plexus.

Parasympathetic nervous system neurons originates from the craniosacral plexus.

20

________ is only secreated by the salivary glands and follicular cells of the thyroid glands.

Iodide is only secreated by the salivary glands and follicular cells of the thyroid glands.

21

__________ secretions of the intestine increase secretion by stimulating crypt cells and are vasodilatory

Paracrine secretions of the intestine increase secretion by stimulating crypt cells and are vasodilatory

_____________________

Histamine and Prostaglandin

22

Types of Intestinal secretions

Exocrine

Paracrine

Endocrine

23

Antiperistalsis is a prominant feature in what species

Equine

______________________

Feature at the pelvic flexure to allow for increased fermentation time

24

___________: paracrine secretion that increases GI motility.

Serotonin: paracrine secretion that increases GI motility.

25

Ruminants use salivary glands as 

Ruminants use salivary glands as a source of ruminal and reticular fluid

_______________________

Essential to buffer acid produced by fermentation

26

GI cells throughout their lifetime move from ________ to ___________

GI cells throughout their lifetime move from crypt to villi

27

The __________ of the GI tract is largely reabsorptive, especially to Cl and Na.

The Large Intestine of the GI tract is largely reabsorptive, especially to Cl and Na.

28

Describe how protein is broken down for absorption

Protein broken down to oligopeptides by protease

Oligopeptides broken down to amino acids by brush border oligopeptidases

29

___________- blood leaving the stomach is markedly alkaline.

Alkaline Tide- blood leaving the stomach is markedly alkaline.

30

________ and _________ are transported from the pancreas for digestion together.

Amylase and Protease are transported from the pancreas for digestion together.