6.3 Flashcards
1
Q
What is the autonomic nervous system?
A
General visceral efferent motor system which controls and regulates involuntary processes
2
Q
Effect of alpha receptors (sympathetic)
A
Smooth muscle contraction
3
Q
Effect of beta 1 receptors (sympathetic)
A
Cardiac muscle contraction
4
Q
Effect of beta 2 and 3 receptors (sympathetic)
A
Smooth muscle relaxation
5
Q
Sympathetic spinal cord regions
A
Thoracic and lumbar
6
Q
Parasympathetic CNS regions
A
Sacral spine + brain
7
Q
Three fates of pre-ganglionic sympathetic fibre leaving spinal cord
A
- Synapse and return to spinal cord as post
- Synapse somewhere up/down the sympathetic chain
- Preganglionic can directly innervate adrenal medulla, prompting release of adrenaline and noradrenaline from chromaffin cells
8
Q
What types of receptors are encountered in the parasympathetic nervous system?
A
- Muscarinic
- Nicotonic
