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