Module 9 Practice

Dendrites are branching extensions of

• neurotransmitters.
• endorphins.
• neurons.
• myelin.
• endocrine glands.

The part of a neuron that transmits neural messages to other neurons or to muscles or glands is called the

• dendrite.
• synapse.
• association area.
• axon.
• cell body.

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

• sympathetic nerve.
• myelin sheath.
• endocrine gland.
• pituitary gland.
• synaptic vesicle.

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

• synapse.
• agonist.
• action potential.
• myelin sheath.
• refractory period.

The minimum level of stimulation required to trigger a neural impulse is called the

• reflex.
• threshold.
• synapse.
• action potential.
• refractory period.

An all-or-none response pattern is characteristic of the

• initiation of neural impulses.
• release of endorphins into the central nervous system.
• release of hormones into the bloodstream.
• activation of either the sympathetic or the parasympathetic system.
• excitation of the antagonistic hormonal system.

The spatial junctions where impulses are chemically transmitted from one neuron to another are called

• neurotransmitters.
• neural networks.
• synapses.
• axons.
• thresholds.

Prozac, a drug commonly prescribed to treat depression, prevents the sending neuron from taking in excess serotonin. Which process does this drug prevent from taking place?

• depolarization
• reuptake
• the all-or-none response
• an action potential
• a refractory period

When the release of ACh is blocked, the result is

• depression.
• muscular paralysis.
• aggression.
• schizophrenia.
• euphoria.

José has just played a long, bruising football game but feels little fatigue or discomfort. His lack of pain is most likely caused by the release of

• glutamate.
• dopamine.
• acetylcholine.
• endorphins.
• insulin.