BHSC 1200 MIDTERM 2 NERVOUS SYSTEM
Depolarization - Answers :voltage change that occurs when the difference in charge
across a membrane decreases-> sodium channels open
Repolarization - Answers :Sodium channels close, potassium channels open
spatial summation - Answers :post synaptic potentials in response to stimuli that occur
at different places across the membrane at the same time
temporal summation - Answers :post synaptic potentials in response to stimuli that
occur at the same place of the membrane at different times
refractory period - Answers :the period of time following an action potential where a
second action potential can't be generated in response to stimuli
relative refractory period - Answers :the period of time following an action potential
where a second action potential can be generated but the stimulus has to be bigger
than normal
absolute refractory period - Answers :the period of time following an action potential
where a second action potential can't be generated at all, regardless of how big the
stimulus
neurotransmitter - Answers :molecules released by secretory vesicles
action potential - Answers :Sequence of rapidly occurring events that decrease and
reverse membrane potential, then restore it back to normal.
Is graded potential or action potential used for long distance communication? - Answers
:action potential
is graded potential or action potential used for short distance communication? -
Answers :graded potential
what is a nerve? - Answers :bundle of 100-1000s of axons in PNS
Ganglia - Answers :cluster of neuronal cell bodies in PNS
cluster of neuronal cell bodies in CNS - Answers :nucleus
Tract - Answers :bundle of axons in CNS
bundle of axons in PNS - Answers :ganglion
, Neuroglia - Answers :cells smaller then neutrons that help with neuron regeneration,
and support them
Satellite cells - Answers :neurogial cells of PNS which encircle PNS axons and provide
structural support and regulate passage of materials between neuronal cell bodies and
ISF
Schwann cells - Answers :neuralgia cells of PNS which form and maintain myelin
sheath around axons
Neuralgia cells of CNS which form myelin sheath - Answers :oligodendrocytes
Microglial cells - Answers :act as phagocytes; remove cellular debris,
ependymal cells - Answers :Help with production, possible monitor and assist in
circulation of CSF; line ventricles of brain
neuralgia cells of CNS that provide support and form BBB (blood-brain barrier) -
Answers :astrocytes
central nervous system - Answers :brain and spinal cord
peripheral nervous system - Answers :everything outside brain and spinal cord
dendrite - Answers :receiving portion of neurons that are short tapered and highly
branched and contain neurotransmitters
axon terminal - Answers :axon and its collaterals end by dividing into many processes
initial segment - Answers :part of axon closest to axon hillock
Sensory neurons are
a) unipolar
b) bipolar
c) multipolar - Answers :a
Motor neurons and interneurons re
a) unipolar
b) bipolar
c) multipolar - Answers :c
The sensory neuron is found in the:
a) posterior (dorsal) root
b) anterior (ventral) root - Answers :a
which one of these is not a method of neurotransmitter removal?
Depolarization - Answers :voltage change that occurs when the difference in charge
across a membrane decreases-> sodium channels open
Repolarization - Answers :Sodium channels close, potassium channels open
spatial summation - Answers :post synaptic potentials in response to stimuli that occur
at different places across the membrane at the same time
temporal summation - Answers :post synaptic potentials in response to stimuli that
occur at the same place of the membrane at different times
refractory period - Answers :the period of time following an action potential where a
second action potential can't be generated in response to stimuli
relative refractory period - Answers :the period of time following an action potential
where a second action potential can be generated but the stimulus has to be bigger
than normal
absolute refractory period - Answers :the period of time following an action potential
where a second action potential can't be generated at all, regardless of how big the
stimulus
neurotransmitter - Answers :molecules released by secretory vesicles
action potential - Answers :Sequence of rapidly occurring events that decrease and
reverse membrane potential, then restore it back to normal.
Is graded potential or action potential used for long distance communication? - Answers
:action potential
is graded potential or action potential used for short distance communication? -
Answers :graded potential
what is a nerve? - Answers :bundle of 100-1000s of axons in PNS
Ganglia - Answers :cluster of neuronal cell bodies in PNS
cluster of neuronal cell bodies in CNS - Answers :nucleus
Tract - Answers :bundle of axons in CNS
bundle of axons in PNS - Answers :ganglion
, Neuroglia - Answers :cells smaller then neutrons that help with neuron regeneration,
and support them
Satellite cells - Answers :neurogial cells of PNS which encircle PNS axons and provide
structural support and regulate passage of materials between neuronal cell bodies and
ISF
Schwann cells - Answers :neuralgia cells of PNS which form and maintain myelin
sheath around axons
Neuralgia cells of CNS which form myelin sheath - Answers :oligodendrocytes
Microglial cells - Answers :act as phagocytes; remove cellular debris,
ependymal cells - Answers :Help with production, possible monitor and assist in
circulation of CSF; line ventricles of brain
neuralgia cells of CNS that provide support and form BBB (blood-brain barrier) -
Answers :astrocytes
central nervous system - Answers :brain and spinal cord
peripheral nervous system - Answers :everything outside brain and spinal cord
dendrite - Answers :receiving portion of neurons that are short tapered and highly
branched and contain neurotransmitters
axon terminal - Answers :axon and its collaterals end by dividing into many processes
initial segment - Answers :part of axon closest to axon hillock
Sensory neurons are
a) unipolar
b) bipolar
c) multipolar - Answers :a
Motor neurons and interneurons re
a) unipolar
b) bipolar
c) multipolar - Answers :c
The sensory neuron is found in the:
a) posterior (dorsal) root
b) anterior (ventral) root - Answers :a
which one of these is not a method of neurotransmitter removal?
