NURSING Nervous System Biology
Study Guide TEST 4 LATEST
VERSIONS REAL EXAM 160
QUESTIONS AND CORRECT
ANSWERS |AGRADE
__________ occurs when the membrane becomes less negatively polarized.
__________ occurs when the membrane becomes mmore negatively polarized. -
✔✔ANSWER✔✔-depolarization, hyperpolarization
A _____ gated channel is one controlled by the binding of small molecules such as
hormones and neurotransmitters - ✔✔ANSWER✔✔-ligand
,A ____________ __________ can be formed by successive wrappings of Schwann
cell membranes around an axon - ✔✔ANSWER✔✔-myelin sheath
a graded potential is produced in the postsynaptic membrane when which of the
following bind to the postsynaptic receptors? - ✔✔ANSWER✔✔-
neurotransmitters
a large enough EPSP can cause the opening of Na+ and K+ voltage gated channels
which can result in which of the following? - ✔✔ANSWER✔✔-an action
potential
a parasympathetic ganglion chain similar to the sympathethic ganglionchain can't
exist b/c preganglionic parasympathethic neurons originate at the ___________
and the ________ regions of the spinal cord - ✔✔ANSWER✔✔-brain, sacral
a primary site where the sensory info is integrated in the brain is the _______. -
✔✔ANSWER✔✔-thalamus
a single postsynaptic neuron can simultaneously receive input from how many
presynaptic neurons? - ✔✔ANSWER✔✔-many
A voltage-gated Na+ ion channel in its resting state has its __________ gate open,
and the __________ gate closed - ✔✔ANSWER✔✔-inactivation, activation
abnormal clumped forms of the protein beta _______ exist external to nerve cells
and are hypothesized to cause Alzheimer's disease - ✔✔ANSWER✔✔-
amyloid
, action potentials are produced only at the node of Ranvier when the axons are
which of the following? - ✔✔ANSWER✔✔-myelinated
agricultural insecticides such as parathlon are inhibitors of the enzyme ________
and can cause muscle paralysis and death - ✔✔ANSWER✔✔-AChE
all characteristics of basal ganglia - ✔✔ANSWER✔✔--they are a collection of
neuronal cell bodies and dendrites
-they are located deep within the cerebrum
-they make up islands of gray matter in the brain
all of the following are biogenic amines except which of the following? -
✔✔ANSWER✔✔-glutamine
all of the following are true for a voltage gated Na+ channel returning to its
resting state except which one? - ✔✔ANSWER✔✔-opening of activation
gate
amines derived from tyrosine include which of the following? -
✔✔ANSWER✔✔-dopamine, epinephrine, norepinephrine
Amino acids that act as chemical messengers in the nervous system include which
of the following? - ✔✔ANSWER✔✔-glycine, GABA
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