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BIO 256 Exam 2 Questions and Answers 100% Solved
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BIO 256 Exam 2 Questions and Answers 100% Solved
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BIO 256 Exam 2 Questions and Answers 100% SolvedWhich can directly cause the round window to bulge when there is increased pressure
Correct Ans-scala tympani
Inside the crust ampullaris, rotational head movement Correct Ans-both increases and
decreases neural firing, depending on the direction of movement
Loud high pitched sounds ben organ of Corti hair cells Correct Ans-in the portion of the
organ of Corti near the oval window
Nerve fibers from the medial aspect of each eye Correct Ans-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 Ans-
dilated
, BIO 256 Exam 2 Questions and Answers 100% Solved
The neuroglia forming the myelin sheath around neuron fibers in the central nervous system
are Correct Ans-oligodendrocytes
Depolarization means Correct Ans-the inside of the cell gets more positive
The part of the neuron that normally receives stimuli is called Correct Ans-a dendrite
Membrane hyperpolarization means Correct Ans-the inside of the cell becomes more
negative than the resting potential
The resting membrane potential is preserved by Correct Ans-the balance of the sodium
and potassium leakage channels with the sodium potassium pump
, BIO 256 Exam 2 Questions and Answers 100% Solved
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
Ans-decreased glucose transport into the cell
When an excitatory stimulus affects a resting neuron, ligand-gated channels open, allowing
the membrane to Correct Ans-depolarize
In general, neurons with myelinated, large diameter fibers transmit information more quickly
than unmyelinated, small diameter fibers Correct Ans-Yes, large diameter myelinated
neurons are faster
Activation of the reticular activating system results in Correct Ans-wakefulness
Sympathetic responses generally are widespread bread Correct Ans-norepinephrine acts
indirectly through a second messenger (slower)
, BIO 256 Exam 2 Questions and Answers 100% Solved
Bitter tastes are converted to nere impulses by Correct Ans-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 Ans-false
The resting membrane potential is characterized by Correct Ans-high potassium and
protein inside the cell, and high sodium and calcium outside the cell
Inside an activated cell Correct Ans-Na and Ca are higher in concentration than in the
resting state
During the relative refractory period, a neuron may respond to a Correct Ans-larger
stimulus than the original
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