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BIOS 256 EXAM 2 (Latest 2024 / 2025) Questions and Answers (Verified Answers)
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BIOS 256 EXAM 2 (Latest 2024 / 2025) Questions and Answers (Verified Answers)
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BIOS 256 EXAM 2 (Latest ) Questions and Answers(Verified Answers)
Inside an activated cell,
Na+ and Ca++ are higher in concentration that in the resting state.
The neuroglia forming the myelin sheath around neuron fibers in the
central nervous system are
oligodendrocytes
The resting membrane potential is characterized by
high potassium and protein inside the cell, and high sodium and calcium outside the cell.
During the relative refractory period, a neuron may respond to a
Larger stimulus than the original
In general, neurons with myelinated, large diameter fibers transmit information more quickly than
unmyelinated, small diameter fibers.
Yes, large diameter myelinated neurons are faster.
The rate-limiting, slowest, step of neural transmission is
synaptic transmission
When a postsynaptic neuron receives repeated stimuli in a short time, this is causes
temporal summation.
Which neurotransmitter is NOT a catecholamine?
serotonin
A neural circuit with input traveling along several pathways for integration by several CNS systems and
providing several response is a
parallel processing circuit.
REM sleep is associated with
temporary skeletal muscle paralysis, except for the extrinsic eye muscles
Which of the following structures is probably NOT directly involved in memory?
medulla oblongata
, Activation of the reticular activating system results in
wakefulness
Which controls the autonomic nervous system?
hypothalamus
Which inhibits inspiration?
pons pneumotaxic center
In contrast to the somatic nervous system, the autonomic nervous system
has two efferent neurons
The site of origin of the preganglionic fibers of the parasympathetic nervous system is the
brainstem and the sacral region of the spinal cord.
Alpha1 receptors respond to ____ and ____ smooth muscles of various blood vessels including those
of the kidneys
norepinephrine, constrict
Feeling a gentle caress on your arm would likely involve all of the following EXCEPT
Pacinian corpuscles.
Which type of receptor's frequency of sensory neuron action potentials increases with the generator
potential and stimulus amplitude?
tonic
Which skin receptors detect deep pressure?
Pacinian corpuscles
Which is true about the spinothalamic tract?
The three neuron chain does not decussate in the medulla.
Which taste sensation detects alkaloids such as quinine and nicotine?
bitter
Salty tastes are converted to nerve impulses by
Na+ influx into detecting cells
Over 1000 scent genes have been identified for detecting different odorants. Each odor you smell
stimulates only one of the binding chemicals coded by these genes.
false
Information from balance receptors goes directly to the
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