Podcast
Questions and Answers
Which of the following is true about acetylcholine?
Which of the following is true about acetylcholine?
- It is synthesized from tyrosine
- It is primarily recycled by the norepinephrine transporter (NET)
- It is broken down by acetylcholinesterase to choline and acetic acid (correct)
- It acts on adrenergic receptors
Where are muscarinic receptors found?
Where are muscarinic receptors found?
- Only in the central nervous system
- In all organs innervated by the parasympathetic and sympathetic nervous system (correct)
- In the adrenal medulla
- In the neuromuscular junction
What is the primary fate of released noradrenaline?
What is the primary fate of released noradrenaline?
- It is broken down by acetylcholinesterase
- 75% is taken back up and recycled by the norepinephrine transporter (NET) (correct)
- It is transported back into the nerve for recycling
- It is primarily used for the synthesis of acetylcholine
What is the function of nicotinic receptors?
What is the function of nicotinic receptors?
What is the primary fate of released acetylcholine?
What is the primary fate of released acetylcholine?
Which enzyme is responsible for the synthesis of noradrenaline from tyrosine?
Which enzyme is responsible for the synthesis of noradrenaline from tyrosine?
Where are nicotinic receptors NOT found?
Where are nicotinic receptors NOT found?
How is the rest of the released noradrenaline, not taken back up for recycling, broken down?
How is the rest of the released noradrenaline, not taken back up for recycling, broken down?
Study Notes
Acetylcholine
- Acetylcholine is a neurotransmitter that plays a crucial role in various physiological processes.
Muscarinic Receptors
- Muscarinic receptors are found in the parasympathetic nervous system, smooth muscle, and exocrine glands.
Noradrenaline
- The primary fate of released noradrenaline is reuptake by the neuron, where it can be recycled or broken down.
Nicotinic Receptors
- The primary function of nicotinic receptors is to regulate rapid synaptic transmission.
Acetylcholine Fate
- The primary fate of released acetylcholine is breakdown by the enzyme acetylcholinesterase.
Noradrenaline Synthesis
- The enzyme responsible for the synthesis of noradrenaline from tyrosine is dopamine β-hydroxylase.
Nicotinic Receptors Absence
- Nicotinic receptors are not found in the parasympathetic nervous system.
Noradrenaline Breakdown
- The rest of the released noradrenaline not taken back up for recycling is broken down by the enzyme monoamine oxidase or catechol-O-methyltransferase.
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Description
Test your knowledge of acetylcholine with this quiz! Learn about its formation, release, and breakdown, as well as its role in acting on cholinergic receptors. See how much you know about the enzymes involved and the recycling process of choline.
