The Distance Between an Axon Terminal and the Receiving Cell

question 15

Multiple Choice

The distance between an axon terminal and the receiving cell must be very small because

• A) the plasma membranes of the two cells must be almost touching for action potentials to pass from one to the other.
• B) neurons use the diffusion of neurotransmitters to transmit stimuli between cells,and diffusion is only rapid over short distances.
• C) the short distance creates a large surface area so that the receiving cell can receive a large number of neurotransmitters at once,ensuring rapid signal transmission.
• D) the short distance allows sodium to be exchanged between the two cells,ensuring that the receiving cell has enough sodium to create an action potential.

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