45. Nervous System

Which of the following is specifically a part or a function of the central nervous system?

A neuron that transmits an impulse to the central nervous system after the neuron is stimulated by the environment is called a(n) __________.

Which of the following is a mechanism by which neurotransmitters can be rapidly cleared from the synaptic cleft?

Saltatory conduction means that the membrane potential changes __________.

What is an increase in the magnitude of the membrane potential called?

A drug that causes potassium to leak out of a neuron, increasing the positive charge on the outside, would __________.

Which of the following statements about the transmission across a typical chemical synapse is true?

The sodium-potassium pump __________.

In descriptions of synapse organization, which type of cell is the transmitting neuron, and which type of neuron, muscle, or gland cell receives the signal?

Threshold is of great significance in the physiology of neurons. What happens if threshold is not reached?

Which of the following is a natural pain reliever?

Which of the following neurotransmitters is most closely associated with schizophrenia, addiction, and Parkinson's disease?

The part of a neuron that carries nerve impulses toward the cell body is called a(n) __________.