L24

Question 1

Why is the series components of the splanchic circulation important?

Answer 1

The series components of the splanchic circulation is composed of the portal vein.

Due to this, ALL venous blood from the gut must be delivered to the liver before entering the general systemic circulation.

This helps ensures that no toxins spread through the body, via the blood

Question 2

Which receptor subtype is located on the smooth muscles of resistance vessels of the splanchinic circulation

Answer 2

Nn receptors

Question 3

What are gastrin, secretin, CCK, and motilin and where are they released from?

Answer 3

Hormones
- Released from mucosal endocrine cells into the blood

Question 4

True or False: Somatostatin and Histamine are neurocrines

Answer 4

False - they are paracrines release by mucosal endocrine cells

Question 5

Which of the following:
a) stimulates secretion of HCl, IF, and Histamine
b) increases intestinal motility
c) participates in gastro-colonic reflex

A. CCK
B. Gastrin
C. Histamine
D. Secretin

Answer 5

B. Gastrin

Question 6

Somatostatin inhibits secretion of which four molecules?

Answer 6

Gastrin
Histamine
HCl
IF

Question 7

____stimulates secretion of HCl and IF, but inhibits SS secretion

Answer 7

Histamine

Question 8

___ is associated with the phasic contractions of the migrating motility complex

Answer 8

Motilin

Question 9

Which molecule strongly stimulates pancreatic and hepatic HCO3 secretion and weakly stimulates pancreatic enzyme secretion?

Also: inhibits HCl

Answer 9

Secretin