On Level Unit 2 Test

Front

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

Back

myelin sheath.

Front

A synapse is a(n)

Back

junction between a sending neuron and a receiving neuron.

Front

Nerves are neural cables containing many

Back

axons.

Front

The chemical messengers of the endocrine system are called

Back

hormones.

Front

Mandy came home late. As she reached to turn on the kitchen light, her hand brushed against something unexpected. Her adrenal glands, as a part of the “fight-or-flight” response, released epinephrine and norepinephrine, which increased her heart rate and blood pressure. Even after she realized it was just the curtain, her excited feelings lingered. This example illustrates

Back

that endocrine messages tend to outlast the effects of neural messages.

Front

Which of the following structures in the brainstem helps coordinate movements and lies above the medulla?
reticular formation,
hippocampus,
pons,
thalamus

Back

pons

Front

Which brain structure receives information from all the senses except smell?

Back

thalamus

Front

Which neural center in the brain plays a central role in emotions such as aggression and fear?

Back

amygdala

Front

You typically fail to consciously perceive that your own nose is in your line of vision. This best illustrates

Back

selective attention.

Front

Standing atop a mountain on an utterly dark, clear night, most of us would see a candle flame atop another mountain 30 miles away. This best illustrates

Back

the absolute threshold.