4 Questions
What type of receptor is present at organs innervated by parasympathetic nerves?
Muscarinic receptor
Which type of receptor does acetylcholine act on at the neuroeffector junction?
Nicotinic acetylcholine receptor
What is the neurotransmitter released by all postganglionic parasympathetic nerves?
Acetylcholine
What is the effect of acetylcholine acting on nicotinic acetylcholine receptors at the neuroeffector junction?
Allows sodium through, causing post-ganglionic cell membrane depolarization
Study Notes
Parasympathetic Nerves and Receptors
- Muscarinic receptors are present at organs innervated by parasympathetic nerves.
- Acetylcholine acts on muscarinic receptors at the neuroeffector junction.
- Acetylcholine is the neurotransmitter released by all postganglionic parasympathetic nerves.
- Acetylcholine acting on nicotinic acetylcholine receptors at the neuroeffector junction has an excitatory effect.
Test your knowledge of parasympathetic nerves and neurotransmitters with this quiz. Explore the role of acetylcholine in both preganglionic and postganglionic parasympathetic nerves, and its interaction with nicotinic acetylcholine receptors.
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