Neurons & Neurotransmitters

Dendrites are branching extensions of

• chromosomes

• genes

• neurons

• glial cells

The function of the dendrites is to

• Release neurotransmitters into the spatial junctions between neurons

• Receive incoming signals from other neurons

• Coordinate the activation of the parasympathetic and sympathetic nervous systems

• Control pain through the release of opiate-like chemicals into the brain

The longest part of a neuron is most likely to be the

• dendrite

• axon

• cell body

• synapse

In transmitting sensory information to the brain an electrical signal within a single neuron travels from the

• Cell body to the axon to the dendrites

• Dendrites to the axon to the cell body

• Axon to the cell body to the dendrites

• Dendrites to the cell body to the axon

The speed at which a neural impulse travels is increased when the axon is encased by a(n)

• myelin sheath

• association area

• endocrine gland

• neural network

A brief electrical charge that travels down the axon of a neuron is called the

• synapse

• threshold

• action potential

• myelin sheath

A synapse is a(n)

• Chemical messenger that triggers muscle contractions

• Automatic response to sensory input

• Neural network

• Junction between a sending and a receiving neuron

An axon is

• A cell that serves as the basic building block of the nervous system.

• A layer of fatty tissue that encases the fibers of many neurons.

• An antagonist molecule that blocks neurotransmitter receptor sites.

• Is a tube-like structure that shoots an action potential through the neuron.