GABA is an inhibitory neurotransmitter. Which part of the cell does it interact with?a)Somab)Myelin sheathc)Axond)DendritesCorrect answer is option 'D'. Can you explain this answer?

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MCAT Exam > MCAT Questions > GABA is an inhibitory neurotransmitter. Which...

GABA is an inhibitory neurotransmitter. Which part of the cell does it interact with?

a)
Soma
b)
Myelin sheath
c)
Axon
d)
Dendrites

Correct answer is option 'D'. Can you explain this answer?

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GABA is an inhibitory neurotransmitter. Which part of the cell does it...

Neurotransmitters are chemical messengers that transmit signals between neurons. When GABA is released by a presynaptic neuron, it binds to receptors on the postsynaptic neuron's dendrites. Dendrites are the branch-like structures that extend from the cell body (soma) of a neuron. They receive signals from other neurons and transmit those signals towards the soma.

By binding to GABA receptors on the dendrites, GABA inhibits the activity of the postsynaptic neuron, reducing its excitability. This inhibition helps regulate and balance neuronal activity in the brain and spinal cord.

Option A (Soma) is incorrect because GABA does not directly interact with the soma of the neuron.

Option B (Myelin sheath) is also incorrect because the myelin sheath is a fatty covering that surrounds the axon of a neuron, facilitating the efficient transmission of electrical signals. GABA does not interact with the myelin sheath.

Option C (Axon) is incorrect because GABA primarily acts on the postsynaptic neuron, specifically on the dendrites, rather than the axon.

Therefore, the correct answer is Option D: Dendrites.

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