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A&P
Test 4
23
Biology
Undergraduate 1
04/28/2016

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Term
Which of the following is not a function of astrocytes
Definition
provide the defense
Term
which of the choices below describes the ANS
Definition
motor fibers that conduct nerve impules from the CNs to the skeletal muscles
Term
What does the central nervous system use to determine the strength of stimulus
Definition
frequency of action potentials
Term
The substance released at axon termianls to propagate nervous impulses is a
Definition
neurotransmitter
Term
A neuron that has its primary function the job of connecting other neurons is called an
Definition
associate neuron
Term
Which of the following is false or incorrect
Definition
A nerve impulse occurs if the excitatory and inhibitory effects are equal
Term
Select the correct statement regarding synapses
Definition
The synaptic cleft prevents an impulse from being transmitted directly from on neuron to another
Term
Which of the following correctly describes a graded potential
Definition
amplitude of various sizes
Term
Immediately after an action potential has peaked, which cellular gates open
Definition
potassium
Term
Which of the following will occur when an excitatory postsynsaptic potential is being generated on the dendritic membrane
Definition
a single type of channel will open, permitting simultaneous flow of sodium and potassium
Term
When a sensory neuron is excited by some form of energy, the resulting graded potential is called a
Definition
generator potential
Term
Which of the following is not true of graded potentials
Definition
They increase amplitudes as they move away from the  stimulus point
Term
Which of the following is true about the movement of ions across excitable living membranes
Definition
Sodium gates in the membrane can open in response to electrical potential changes
Term
A second nerve impulse cannot be generated until
Definition
The membrane potential has been restablished
Term
In what way does the interior surface of a cell membrane of a resting (nonconducting) neuron differ from the external enviroment? The interior is
Definition
negatively charged and contains less sodium
Term
If a motor neuron in the body were stimulated by an electrode placed about midpoint along the length of the axon
Definition
the impulse would spread bi-directionally
Term
Which of the following neurotransmitters inhibits pain and mimicked by morphine, heroin, methadone
Definition
endorphin
Term
Which of the following describes the excitatory postsynaptic potential
Definition
short distance depolarization
Term
which brian necleus is the body's "biological clock"
Definition
suprachiastmatic nucleus
Term
spinocerebellar tracts
Definition
carry proprioceptive inputs to the cerebellum
Term
Which of the following best describes the cerebrum
Definition
executive suite
Term
Which of the following generalization does not describe the cerebral cortex
Definition
the hemispheres are exactly equal in function
Term
If the caudal portion of the neural tube failed to develop properly the
Definition
spinal cord maybe affected
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