Autonomic Nervous system

Question 1

what is the ANS divided into?

Answer 1

enteric system, sympathetic (fight or flight) and parasympathetic (digest and rest)

Question 2

what does ANS innervate mostly?

Answer 2

visceral (internal) organs. both innervate the same thing but act as antagonists

Question 3

Sympathetic activation results in….

Answer 3

increase in - BP HR Cardiac contraction rate, bronchiodilation,ventilation, blood glucose, glycogenolysis in liver, break down of triglycerides so more for ATP production

redirects blood to skeletal muscles and the cardiac muscles by vasoconstriction of visceral vessels and dilating those to skeletal and cardiac muscle

pupils dilate

Question 4

Parasympathetic activation results in…

Answer 4

decrease in - HR, BP
Increase in - secretion of saliva for digestion and mobility in GI tract

pupils constrict, defecate

Question 5

Sympathetic organisation….

Answer 5

preganglionic is short and myelinated cholinergic
N2 receptor activated by ACh
Postganglioic is longer
releases norepinepherine
activated target cell
alpha and beta adrenergic receptors on target

Question 6

Adrenal Medulla organisation…

Answer 6

preganglionic is short and myelinated cholinergic
N2 receptor activated by ACh
Causes activation of a chromaffin cell in medulla
releases adrenaline that travels in the blood to target cells in multiple tissues
Target expresses alpha and beta adrenergic receptors

Question 7

Sweat glads organisation…

Answer 7

preganglionic is short and myelinated cholinergic
N2 receptor activated by ACh
Postganglionic is long and cholinergic
releases acetylcholine
activates target cell muscarinic ACh receptors

Question 8

Parasympathetic organisation…

Answer 8

long cholinergic preganglionic fibre that activated N2 receptors
short cholinergic post
target tissue expresses muscarinic ACh receptors