Question

which of the following is the tree-like structure that receive signals in an infants brain?

a.) synapses

b.) neurotransmitters

c.) axons

d.) dendrites

Explanation:

Identify the key anatomical features

The question asks for a "tree-like structure" that "receives signals" in the brain. Let's analyze the function and structure of each option:

• Synapses: These are the microscopic junctions or gaps between neurons where chemical signals are transmitted, not tree-like receiving structures themselves.
• Neurotransmitters: These are chemical messengers released by neurons to transmit signals across synapses, not physical cellular structures.
• Axons: These are long, slender projections of a neuron that typically conduct electrical impulses away from the neuron's cell body (sending signals).
• Dendrites: These are the branch-like, tree-like extensions of a neuron that project from the cell body. Their primary function is to receive incoming signals (synaptic inputs) from other neurons.

Match with the question description

The term "dendrite" comes from the Greek word dendron, which literally means "tree." Their highly branched structure resembles a tree canopy, designed to maximize the surface area for receiving chemical messages from neighboring axons. Therefore, dendrites are the tree-like structures that receive signals.

Answer:

• a.) Synapses
• b.) Neurotransmitters
• c.) Axons
• d.) Dendrites (Correct answer)