Chapter 11

The brain and spinal cord make up the?

central nervous system

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

sensory division

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

cell body

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

dendrites

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

axons

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

Schwann cells

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

synaptic terminal

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

sodium channels open

During an action potential?

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

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

sensory neurons

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

motor neurons

An action potential moves along an?

axon

Which of the following is characteristic of psychoactive drugs?

they alter levels of neurotransmitters

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

limbic system

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

dura mater, pia mater, and arachnoid

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

autonomic division

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

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

neuroglial