Question

1. which ions play a huge role in keeping resting potential? a. cl and na+ b. na+ and k+ c. na+ and mg+ 13. the action potential is always either on or off. a. true b. false 14. what structure releases neurotransmitters? a. glial cells b. dendrites c. synaptic vesicles 15. what is the name of the gap or junction between two neurons where neurons communicate? a. synapse b. axon terminal c. axon

Explanation:

1. Resting potential is mainly maintained by \(Na^+\) (sodium ions) and \(K^+\) (potassium ions) through the sodium - potassium pump.
2. The action potential follows the all - or - none law, meaning it is either on (fires) or off (does not fire).
3. Synaptic vesicles are structures within the presynaptic neuron that release neurotransmitters into the synaptic cleft.
4. The synapse is the gap or junction between two neurons where communication occurs. Glial cells support neurons, dendrites receive signals, and the axon terminal is part of the neuron but the synapse is the communication gap. The axon is the long fiber of a neuron for transmitting signals.

Answer:

1. B. \(Na^+\) and \(K^+\)
2. A. true
3. C. synaptic vesicles
4. A. synapse