Lecture 30: Autonomic Systems Flashcards
1
Q
Autonomic:
A
- Two neurons between the CNS and effector
2
Q
Somatic vs autonomic efferent pathways:
A
S:
- innervates skeletal muscle
- always excitatory
A:
- innervates smooth, cardiac, glands, GI neurons
- can be excitatory or inhibitory
3
Q
Sympathetic preganglionic neurons emerge from…
A
- thoracolumbar region
4
Q
Presympathetic preganglionic neurons emerge from…
A
- cranial region
5
Q
Ionotropic:
A
- Receptors contain an ion channel
6
Q
Metabotropic:
A
- receptors linked to intercellular (metabolic) messengers
7
Q
Rest and digest and….?
A
- Molest
8
Q
Why is there no preganglionic cell for the adrenal medulla?
A
- Activation of the adrenal gland, adrenaline straight into the blood, no ganglion
9
Q
What effect does sympathetic tone have on blood vessels?
A
- Can widen or narrow lumen
10
Q
Involuntary actions include…
A
- Regulation of physiological states
- Reflexes
11
Q
Voluntary controls include…
A
- Self-regulation of emotional response
- Eg fear, anxiety
12
Q
What system is responsible for the constriction of pupils?
A
- parasympathetic
13
Q
Somatic:
A
- One motor neuron between the CNS and the effector
