Question

In a nerve cell (neuron), the conversion of electrical signal to chemical signal occurs in/at:

• A. dendritic end
• B. cell body
• C. axon
• D. axonal end

Answer 1

The Correct Option is D

Nerve Impulse Transmission:

Electrical to Chemical Signal Conversion:
At the axon terminal, an electrical nerve impulse transforms into a chemical signal. Upon reaching the terminal, the electrical impulse initiates the release of neurotransmitters. These chemicals bridge the synaptic gap between neurons, relaying the signal. This mechanism is vital for inter-neuron nerve impulse transmission.

Dendrites:
Branch-like structures at the neuron's origin, dendrites receive signals from other neurons or sensory inputs. They function as the neuron's receptors, collecting electrical impulses from adjacent neurons or stimuli.

Cell Body (Soma):
The soma, or cell body, integrates signals from dendrites. It houses the nucleus and is responsible for processing and initiating the nerve impulse that travels down the axon. It also maintains the neuron's metabolic functions.

Axon:
The axon is a long projection that conducts electrical signals from the cell body to the synaptic terminal. It is crucial for transmitting nerve impulses over distances to communicate with other neurons or muscles. At its terminal, the electrical signal converts to a chemical signal for synaptic transmission.

Conclusion:
Dendrites, the cell body, axon, and synaptic terminal collaborate for signal transmission and processing within the nervous system. Electrical signals within a neuron are converted to chemical signals at the synapse, enabling neural communication and supporting functions like cognition, movement, and sensation.