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# Neuron at Rest The image depicts a neuron at rest, highlighting various ion channels and segments of the neuron. ## Components The neuron is shown with its different parts labeled: * **Dendrites:** Branch-like extensions that receive signals from other neurons. * **Cell body:** The central...

# Neuron at Rest The image depicts a neuron at rest, highlighting various ion channels and segments of the neuron. ## Components The neuron is shown with its different parts labeled: * **Dendrites:** Branch-like extensions that receive signals from other neurons. * **Cell body:** The central part of the neuron that contains the nucleus and other organelles. * **Axon hillock:** The cone-shaped region where the axon begins, crucial for action potential initiation. * **Axon:** The long, slender projection that transmits signals to other neurons or target cells. * **Synaptic knob:** The terminal end of the axon that releases neurotransmitters to communicate with the next neuron. * **Receptive segment:** The region of the neuron where signals are first received from other neurons. * **Initial segment:** The segment immediately after the cell body, where action potentials are generated. * **Conductive segment:** The axon, where action potentials travel. * **Transmissive segment:** The terminal region of the axon, where neurotransmitters are released. ## Ion Channels Various ion channels are shown to illustrate their roles in maintaining the resting potential of the neuron, including: * **Chemically gated cation channel:** Allows certain positively charged ions to pass through in response to specific chemical signals. * **Chemically gated K+ channel:** Enables potassium ions (*K*+) to pass through in response to chemical signals. * **Chemically gated Cl- channel:** Enables chloride ions (*Cl*-) to pass through in response to chemical signals. * **Voltage-gated K+ channel:** Allows potassium ions to pass through in response to changes in membrane potential. * **Voltage-gated Na+ channel:** Enables sodium ions (*Na*+) to pass through in response to changes in membrane potential. * **Voltage-gated Ca2+ channel:** Allows calcium ions (*Ca*2+) to pass through in response to changes in membrane potential. ## Membrane Potential The resting membrane potential of the neuron is shown as -70 mV. This is indicated at various points along the neuron. The image effectively visualizes the structural components and ion channels involved in neuronal function at rest. Smaller positively and negatively charged particles are shown across the membrane to explain the potential. Different colors are used to show differences between the types of ion channels.