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BIO 256 Exam 2 latest 2024/2025 || with questions and verified answers graded A+
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BIO 256 Exam 2 latest 2024/2025 || with questions and verified answers graded A+
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BIO 256 Exam 2 latest 2024/2025 || with questionsand verified answers graded A+
The part of the neuron that normally receives stimuli is called - CORRECT
ANSWER ; a dendrite
Membrane hyperpolarization means - CORRECT ANSWER ; the inside of the
cell becomes more negative than the resting potential
The resting membrane potential is preserved by - CORRECT ANSWER ; the
balance of the sodium and potassium leakage channels with the sodium potassium
pump
If you were to administer a drug that blocked the activity of the sodium/potassium
pump, what effect would you expect that to have on the cells ability to absorb
glucose - CORRECT ANSWER ; decreased glucose transport into the cell
When an excitatory stimulus affects a resting neuron, ligand-gated channels open,
allowing the membrane to - CORRECT ANSWER ; depolarize
In general, neurons with myelinated, large diameter fibers transmit information
more quickly than unmyelinated, small diameter fibers - CORRECT ANSWER ;
Yes, large diameter myelinated neurons are faster
Activation of the reticular activating system results in - CORRECT ANSWER ;
wakefulness
,Sympathetic responses generally are widespread bread - CORRECT ANSWER ;
norepinephrine acts indirectly through a second messenger (slower)
Bitter tastes are converted to nere impulses by - CORRECT ANSWER ; closing
the potassium channel directly
Over 100 "small" genes have been identified for detecting different odorants. Each
"odor" you smell stimulates only one of the binding chemicals coded by these
genes - CORRECT ANSWER ; false
Which can directly cause the round window to bulge when there is increased
pressure - CORRECT ANSWER ; scala tympani
Inside the crust ampullaris, rotational head movement - CORRECT ANSWER ;
both increases and decreases neural firing, depending on the direction of
movement
Loud high pitched sounds ben organ of Corti hair cells - CORRECT ANSWER ;
in the portion of the organ of Corti near the oval window
Nerve fibers from the medial aspect of each eye - CORRECT ANSWER ; cross
over to the opposite side at the optic chiasma
I can tell when you are really enjoying a lecture because your pupils are -
CORRECT ANSWER ; dilated
The neuroglia forming the myelin sheath around neuron fibers in the central
nervous system are - CORRECT ANSWER ; oligodendrocytes
, Depolarization means - CORRECT ANSWER ; the inside of the cell gets more
positive
The resting membrane potential is characterized by - CORRECT ANSWER ;
high potassium and protein inside the cell, and high sodium and calcium outside
the cell
Inside an activated cell - CORRECT ANSWER ; Na and Ca are higher in
concentration than in the resting state
During the relative refractory period, a neuron may respond to a - CORRECT
ANSWER ; larger stimulus than the original
In general, neurons with myelinated, large diameter fibers transmit information
more quickly than unmyelinated, small diameter fibers - CORRECT ANSWER ;
Yes, large diameter myelinated neurons are faster
The substance released at axonal endings to propagate a excretory postsynaptic
impulse is called a - CORRECT ANSWER ; neurotransmitter
The period after an initial stimulus when a neuron is not sensitive to another
stimulus is the - CORRECT ANSWER ; refractory period
If one coming impulse causes several outgoing nerve impulses, we know that there
is a - CORRECT ANSWER ; diverging circuit
Activation of the reticular activating system results in - CORRECT ANSWER ;
wakefulness
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