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Human Biology: Ch:6
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Cards (13)
Which of the following cavities contains a component of the central nervous system?
Cranial
Which structure predominates in the white matter of the brain?
myelinated axons
Which part of the neuron transmits an electrical signal to a target cell?
Axon
Which term describes a bundle of axons in the peripheral nervous system?
nerve
Which functional division of the nervous system would be responsible for the psychological changes seen during exercise?
autonomic
What type of glial cell provides myelin for the axons in a tract?
oligodendorcyte
Which part of a neuron contains the nucleus?
Soma
Which of the following substances is least able to cross the blood-brain barrier?
White blood cells
If a thermoreceptor is sensitive to temperature sensations, what would a chemoreceptor be sensitive to?
Molecules
Which of these locations is where the greatest level of integration is taking place in the example of testing the temperature of the shower?
Cerebral cortex
How long does all the signaling through the sensory
pathway
, within the central nervous system, and through the motor command pathway take?
Fraction of
a
second
What ion enters a neuron, causing depolarization of the cell membrane?
Sodium
Which of the following is probably going to propagate an action potential fastest?
A thick, myelinated axon