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PSU Bio 141 Exam 2 Zeman Questions and
Correct Answers/ Latest Update / Already
Graded
Convergence
Ans: A mechanism for providing input to a single neuron from
multiple sources
Serial Processing
Ans: A mechanism in which neurons or pools work sequentially
Temporal Summation (Frequency)
Ans: Occurs on a membrane that receives two depolarizing
stimuli from the same source; impulse arrives close to the axon
hillock and a second stimulus quickly adds to it and creates
action potential propagation
Spatial Summation (Location)
Ans: Occurs when sources of stimulation arrive simultaneously,
but at different locations; local currents spread the depolarizing
effects and areas of overlap experience combined effects
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Cholinergic Receptors
Ans: attaches to Acetylcholine
Adrenergic receptors
Ans: attaches to Norepinephrine- Adrenaline
Acetylcholine
Ans: Most plentiful neurotransmitter in the body;made in brain
and released by nerve cells; active everywhere, especially the
neuromuscular junction; serves excitatory and inhibitory
functions; used in all preganglionic neurons and only in
postganglionic sympathetic neurons
Calcium in a neural secretion
Ans: entry triggered by depolarization at terminals; basically
once an action potential reaches the end of axon terminal this
will open up channels to let calcium in; once this calcium enters
the neuron it triggers the release of the neurotransmitters into
the synaptic cleft
AChE
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Ans: Acetylcholinesterase; it is an enzyme that will basically
eat up and destroy the leftover acetylcholine so that the muscle
doesn't continue to contract
Sodium and Potassium
Ans: Just know that sodium will always be entering and
depolarizing the cell to start an action potential and potassium
will always leave the cell once voltage gets super high to return
the cell back to normal
Interneurons
Ans: located in CNS; transmits impulses between other
neurons (apart of reflex arcs)
Afferent Neurons
Ans: Sensory neurons in PNS; signals sent to the brian
Efferent Neurons
Ans: Motor neurons in PNS; signals sent away from brian (to
target)
All rights reserved © 2025/ 2026 |
PSU Bio 141 Exam 2 Zeman Questions and
Correct Answers/ Latest Update / Already
Graded
Convergence
Ans: A mechanism for providing input to a single neuron from
multiple sources
Serial Processing
Ans: A mechanism in which neurons or pools work sequentially
Temporal Summation (Frequency)
Ans: Occurs on a membrane that receives two depolarizing
stimuli from the same source; impulse arrives close to the axon
hillock and a second stimulus quickly adds to it and creates
action potential propagation
Spatial Summation (Location)
Ans: Occurs when sources of stimulation arrive simultaneously,
but at different locations; local currents spread the depolarizing
effects and areas of overlap experience combined effects
All rights reserved © 2025/ 2026 |
, Page |2
Cholinergic Receptors
Ans: attaches to Acetylcholine
Adrenergic receptors
Ans: attaches to Norepinephrine- Adrenaline
Acetylcholine
Ans: Most plentiful neurotransmitter in the body;made in brain
and released by nerve cells; active everywhere, especially the
neuromuscular junction; serves excitatory and inhibitory
functions; used in all preganglionic neurons and only in
postganglionic sympathetic neurons
Calcium in a neural secretion
Ans: entry triggered by depolarization at terminals; basically
once an action potential reaches the end of axon terminal this
will open up channels to let calcium in; once this calcium enters
the neuron it triggers the release of the neurotransmitters into
the synaptic cleft
AChE
All rights reserved © 2025/ 2026 |
, Page |3
Ans: Acetylcholinesterase; it is an enzyme that will basically
eat up and destroy the leftover acetylcholine so that the muscle
doesn't continue to contract
Sodium and Potassium
Ans: Just know that sodium will always be entering and
depolarizing the cell to start an action potential and potassium
will always leave the cell once voltage gets super high to return
the cell back to normal
Interneurons
Ans: located in CNS; transmits impulses between other
neurons (apart of reflex arcs)
Afferent Neurons
Ans: Sensory neurons in PNS; signals sent to the brian
Efferent Neurons
Ans: Motor neurons in PNS; signals sent away from brian (to
target)
All rights reserved © 2025/ 2026 |
