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Where on the neuron (dendrites, cell body, axon) would you be likely to find each of the three types of ion channels that are found on a neuron

a) Dendrites - Voltage-gated; Cell body - Ligand-gated; Axon - Leak channels
b) Dendrites - Leak channels; Cell body - Voltage-gated; Axon - Ligand-gated
c) Dendrites - Ligand-gated; Cell body - Voltage-gated; Axon - Leak channels
d) Dendrites - Voltage-gated; Cell body - Leak channels; Axon - Ligand-gated

User Avariant
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Final answer:

The correct distribution of ion channels across a neuron is dendrites with ligand-gated channels, the cell body with voltage-gated channels, and the axon with leak channels.

Step-by-step explanation:

The question is asking where on the neuron you would be likely to find each of the three types of ion channels: voltage-gated, ligand-gated, and leak channels. Neurons have specialized areas where these ion channels are typically found. The dendrites predominantly contain ligand-gated ion channels, which open in response to neurotransmitters binding to their receptors. On the other hand, the axon, especially at the axon hillock and along the nodes of Ranvier, is rich in voltage-gated ion channels, which are crucial for the generation and propagation of action potentials. Furthermore, leak channels are found throughout the neuron's membrane and are typically always open, allowing ions to passively flow to maintain the resting membrane potential.

Based on this information, the correct answer to the student's question is (c) Dendrites - Ligand-gated; Cell body - Voltage-gated; Axon - Leak channels.

User Raja Hammad Farooq
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