Chapter 11

What type of cell makes up the myelin sheath of a motor neuron?

Schwann cells

The contraction of smooth and cardiac muscle is controlled by what division of the PNS?

autonomic division

An action potential moves along an?

axon

A nerve impulse moves away from a neuron's cell body along?

axons

A neuron's nucleus is located in it's?

cell body

The brain and spinal cord make up the?

central nervous system

A nerve impulse moves toward a neuron's cell body along?

dendrites

The central nervous system is enclosed by membranes or meninges called the?

dura mater, pia mater, and arachnoid

Which of the following parts of the brain is associated with emotions and behavior?

limbic system

What cells transmit impulses away from the central nervous system to the muscles and other organs?

motor neurons

Which one of the following divisions of the nervous system predominates during the relaxed state?

parasympathetic division

In a synapse, neurotransmitters are stored in vesicles located in the?

presynaptic neuron

Neurons of the PNS that transmit information to the CNS are?

sensory neurons

Which of the following events is the first to occur during an action potential?

sodium channels open

Cells in nerve tissue that support and protect neurons are called ________ cells.

neuroglial

Which one of the following provides the central nervous system with information about the outside environment?

sensory division

What part of a neuron relays signals from one neuron to another neuron or to an effector?

synaptic terminal

During an action potential?

the inside of the neuron becomes positively charged relative to the outside

Which of the following is characteristic of psychoactive drugs?

they alter levels of neurotransmitters