PNS Flashcards
What does N1 (or Nm) innervate?
Neuromuscular Junction
What does N2 (or Nn) innervate?
- Autonomic ganglia
- CNS
- Adrenal Medulla
What does M1 innervate?
- Striatum
- Cortex
- Hippocampus
What does M2 innervate?
- Forebrain
- Thalamus
- Heart
- Pupil
- Spinal Cord
- Exocrine
What does M3 innervate?
- Brain
- Hypothalamus
- Pupils
- Exocrine
- Peripheral Arteries
What does M4 innervate?
- Striatum
- Cortex
- Hippocampus
- Spinal Cord
What does M5 innervate?
- Dopaminergic neurons
- Basal ganglia
- Brain vasculature
What is an antagonist for nicotinic receptors?
N1: Curare
N2: Hexamethonium
What is an antagonist for muscarinic receptors?
- Atropine
- Scopolamine
What is an antagonist for alpha adrenergic catecholamine receptors?
Phentolamine (α1 and α2)
What is an antagonist for beta adrenergic catecholamine receptors?
Propanolol (β1 and β2)
What is an antagonist for Somatic Motor Nicotinic receptors?
Curare
What is an agonist for alpha adrenergic catecholamine receptors?
Phenylephrine (α1)
What is an agonist for beta adrenergic catecholamine receptors?
Isoproterenol (β1 and β2)
For the SNS, how is the pupil dilated?
α1 receives adrenergic stimulation to contract the radial muscle for pupil dilation.
For the PNS, how is the pupil constricted?
M3 receives cholinergic stimulation to contract the sphincter muscle for pupil constriction.
What is another word for pupil dialation?
Mydriasis
What is another word for pupil constriction?
Miosis
In the SNS, how is the eye adjusted for far vision?
β2 relaxes the ciliary muscle
In the PNS, how is the eye contacted for near vision?
M3 contracts the ciliary muscle
