Question

the terminal button is where a neuron
grows new axons.
sends messages to other neurons.
synthesizes neurotransmitters.
receives input from other neurons or senses.

Explanation:

To solve this, we analyze each option:

• "grows new axons": Terminal buttons don't grow axons. Axons are long projections, and terminal buttons are at axon endings. Eliminate this.
• "sends messages to other neurons": Terminal buttons (synaptic knobs) release neurotransmitters to send signals to other neurons (across synapses). This matches their function.
• "synthesizes neurotransmitters": Neurotransmitters are synthesized in the cell body (soma) or along axons, not mainly at terminal buttons. Eliminate this.
• "receives input from other neurons or senses": Dendrites or sensory receptors receive input, not terminal buttons. Eliminate this.

Answer:

B. sends messages to other neurons.