Acetylcholine diffuses across a synaptic cleft and binds to ligand-gated Blank______ channels.Multiple choice question.ironcalciumpotassiumsodium

Break Down the Problem

1. Identify the substance in question: acetylcholine.
2. Determine the type of channels it binds to: ligand-gated channels.
3. Review the options provided: iron, calcium, potassium, sodium.

Relevant Concepts

1. Acetylcholine is a neurotransmitter involved in transmitting signals in the nervous system.
2. Ligand-gated channels are ion channels that open in response to the binding of a chemical messenger (ligand) such as acetylcholine.
3. Understanding the function of each ion when associated with neuron signaling helps identify the correct choice.

Analysis and Detail

1. Acetylcholine is known to primarily act on sodium channels to facilitate an influx of sodium ions, which can lead to depolarization of the neuron.
2. Calcium channels can also be involved in neurotransmitter release but aren't the primary channels for acetylcholine>
3. Potassium channels generally work to repolarize the cell membrane, not directly activated by acetylcholine.
4. Iron channels are not typically associated with synaptic transmission in this context.

Verify and Summarize

• The function of acetylcholine in the nervous system focuses on its interaction with sodium channels.
• Given that acetylcholine binds to ligand-gated channels primarily responsible for depolarization, the most appropriate answer is sodium.

Final Answer

Acetylcholine diffuses across a synaptic cleft and binds to ligand-gated sodium channels.