age 1 of 72
BIO 256 EXAM 2 2025/2026 ACCURATE QUESTIONS
WITH CORRECT DETAILED ANSWERS || 100%
GUARANTEED PASS <LATEST VERSION>
Which is the most accurate description of how action potentials
work? .......Answer.........ligand gated ion channels open -->
voltage gated sodium channels open --> voltage gated
potassium channels open -->voltage gated sodium channels
close --> voltage gated potassium channels close
The sodium-potassium ATPase pump .......Answer.........pumps three
sodium ions out of the cell and two potassium ions into the cell.
Choose the most accurate statement about sound.
.......Answer.........A ten-decibel increase represents a tenfold
increase in sound intensity.
,age 2 of 72
What is saltatory conduction in a neuron? Is it fast or slow?
.......Answer.........Saltatory conductions describes how an action
potential jumps from node to node in a myelinated fiber. It is
fast.
If one incoming impulse causes several outgoing nerve impulses,
we know that there is a .......Answer.........diverging circuit
Alpha1 receptors respond to ____ and ____ smooth muscles of
various blood vessels including those of the kidneys.
.......Answer.........Norepinephrine (NE), constrict
Which type of receptors fire quickly when first stimulated but
then slow their firing to adapt to the stimulus?
.......Answer.........Phasic
Which taste sensation detects alkaloids such as quinine and
nicotine? .......Answer.........bitter
,age 3 of 72
Salty tastes are converted to nerve impulses by
.......Answer.........na+ influx into detecting cells
Which can directly cause the round window to bulge when there
is increased pressure? .......Answer.........Scala tympani
The part of the neuron that normally receives stimuli is called
.......Answer.........dendrite
Depolarization means .......Answer.........the inside of the cell gets
more positive.
The resting membrane potential is largely preserved by
.......Answer.........the sodium potassium ATPase pump.
Inside an activated cell, .......Answer.........Na+ and Ca++ are
higher in concentration than in the resting state.
, age 4 of 72
With electrical synapses, a signal is sent from a presynaptic
neuron to a postsynaptic neuron via .......Answer.........gap
junctions
What is the function of acetylcholine in a neuromuscular junction?
.......Answer.........It enters to myofiber, causing the myosin-actin
interaction of a contraction.
Which regular, rhythmic low-amplitude brain waves indicate an
idling brain? .......Answer.........alpha waves
Which characterizes the fourth stage of sleep in the sleep cycle?
.......Answer.........EEG pattern is dominated by delta waves;
skeletal muscles are relaxed; arousal difficult
Fact memory .......Answer.........is the ability to learn specific
information.
BIO 256 EXAM 2 2025/2026 ACCURATE QUESTIONS
WITH CORRECT DETAILED ANSWERS || 100%
GUARANTEED PASS <LATEST VERSION>
Which is the most accurate description of how action potentials
work? .......Answer.........ligand gated ion channels open -->
voltage gated sodium channels open --> voltage gated
potassium channels open -->voltage gated sodium channels
close --> voltage gated potassium channels close
The sodium-potassium ATPase pump .......Answer.........pumps three
sodium ions out of the cell and two potassium ions into the cell.
Choose the most accurate statement about sound.
.......Answer.........A ten-decibel increase represents a tenfold
increase in sound intensity.
,age 2 of 72
What is saltatory conduction in a neuron? Is it fast or slow?
.......Answer.........Saltatory conductions describes how an action
potential jumps from node to node in a myelinated fiber. It is
fast.
If one incoming impulse causes several outgoing nerve impulses,
we know that there is a .......Answer.........diverging circuit
Alpha1 receptors respond to ____ and ____ smooth muscles of
various blood vessels including those of the kidneys.
.......Answer.........Norepinephrine (NE), constrict
Which type of receptors fire quickly when first stimulated but
then slow their firing to adapt to the stimulus?
.......Answer.........Phasic
Which taste sensation detects alkaloids such as quinine and
nicotine? .......Answer.........bitter
,age 3 of 72
Salty tastes are converted to nerve impulses by
.......Answer.........na+ influx into detecting cells
Which can directly cause the round window to bulge when there
is increased pressure? .......Answer.........Scala tympani
The part of the neuron that normally receives stimuli is called
.......Answer.........dendrite
Depolarization means .......Answer.........the inside of the cell gets
more positive.
The resting membrane potential is largely preserved by
.......Answer.........the sodium potassium ATPase pump.
Inside an activated cell, .......Answer.........Na+ and Ca++ are
higher in concentration than in the resting state.
, age 4 of 72
With electrical synapses, a signal is sent from a presynaptic
neuron to a postsynaptic neuron via .......Answer.........gap
junctions
What is the function of acetylcholine in a neuromuscular junction?
.......Answer.........It enters to myofiber, causing the myosin-actin
interaction of a contraction.
Which regular, rhythmic low-amplitude brain waves indicate an
idling brain? .......Answer.........alpha waves
Which characterizes the fourth stage of sleep in the sleep cycle?
.......Answer.........EEG pattern is dominated by delta waves;
skeletal muscles are relaxed; arousal difficult
Fact memory .......Answer.........is the ability to learn specific
information.
