The club-shaped nerve fiber endings of the axon that secrete chemicals and form synaptic contacts with other nerve cells are called the

The club-shaped nerve fiber endings of the axon that secrete chemicals and form synaptic contacts with other nerve cells are called the

• A. Synaptic knob
• B. Aqueous humor
• C. Choroid coat
• D. Terminal branches

Answer: (D)

The idea being tested is how neurons end and communicate with each other. The distal parts of an axon branch out into ends that are specialized for making contact with other neurons and releasing chemical signals. These endings are the terminal branches, and each branch ends in a synaptic knob (terminal bouton) where neurotransmitters are released to form a synapse. So the term that fits the description of these club-shaped endings that secrete chemicals and establish synaptic contacts is terminal branches. The other options refer to parts not involved in axonal contact with other neurons or to structures outside of neurons (for example, parts of the eye).

The idea being tested is how neurons end and communicate with each other. The distal parts of an axon branch out into ends that are specialized for making contact with other neurons and releasing chemical signals. These endings are the terminal branches, and each branch ends in a synaptic knob (terminal bouton) where neurotransmitters are released to form a synapse. So the term that fits the description of these club-shaped endings that secrete chemicals and establish synaptic contacts is terminal branches. The other options refer to parts not involved in axonal contact with other neurons or to structures outside of neurons (for example, parts of the eye).