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WorksheetsNervous System and Nervous Tissue
Total questions: 40
Worksheet time: 20mins
The nervous system has two principal divisions, the central nervous system and the ____.
peripheral nervous system
somatic nervous system
parietal nervous system
lateral nervous system
Nerve cells that conduct impulses from the central nervous system to muscles and glands are ____ neurons.
efferent
afferent
inter
sensory
Sacs that store chemicals in the axon terminals are synaptic ____.
vesicles
receptors
ion channels
enzymes
A covering around axons, which is produced by neuroglia, is called the ____ sheath.
myelin
nervous
glial
astrocyte
The neurons in the walls of the organs of the digestive system form _______.
enteric plexuses
ganglia
nuclei
tracts
The gaps in the myelin sheath along axons are called _____.
nodes of Ranvier
saltatory nodes
myelin gaps
synapses
The sodium-potassium pump is a(n) _______ transport mechanism.
active
passive
diffusion
osmosis
-70 mV is the continuous voltage in neurons during _______ membrane potential.
resting
threshold
depolarization
repolarization
The critical level of depolarization that has to be reached for an action potential to occur is the _______.
resting potential
threshold potential
depolarization
repolarization
hyperpolarization
When the polarity of a membrane becomes more negative than the resting membrane potential, the membrane is considered to be ____.
depolarized
repolarized
hyperpolarized
at threshold potential
The type of impulse conduction in myelinated fibers is called ____.
saltatory
continuous
synaptic
myelinated
The neuron before a synapse is a(n) ____ neuron.
presynaptic
postsynaptic
motor
inhibitory
The chemicals stored in synaptic vesicles are referred to as ____.
neurotransmitters
hormones
enzymes
ions
A nerve cell is turned on completely or not at all. This is known as
the all-or-none principle
saltatory conduction
continuous conduction
temporal summation
Channels that open in response to a change in the membrane potential are _______ ion channels.
voltage-gated
leakage
sodium-potassium pump
ligand-gated
A neuron with a voltage of -55 mV is at the ____________ potential.
resting
threshold
depolarized
repolarized
Neurons that conduct nerve impulses from the receptors to the central nervous system are
efferent
afferent
inter
sensory
Which of the following is an example of an effector?
glands
bones
skin
cartilage
The portion of the nervous system that is considered involuntary is the
autonomic nervous system
somatic nervous system
central nervous system
peripheral nervous system
Compared to unmyleninated axons, myelinated axons conduct impulses
faster
slower
more often
less often
The neuroglial cell involved in the blood brain barrier is the
astrocyte
oligodendrocyte
Schwann cell
satellite cell
Depolarization of a membrane is begins with the
opening of sodium channels
opening of potassium channels
opening of calcium channels
closing of sodium channels
The junction between two nerve cells is called a
synapse
neuromuscular junction
node of Ranvier
myelin sheath
Which ion triggers the release of the neurotransmitter into the synaptic cleft?
sodium
potassium
calcium
chloride
What is the effect of inhibitory neurotransmitters on the postsynaptic membrane?
depolarization
hyperpolarization
reaching threshold potential
no effect
Which of the following provides myelin for axons in the CNS?
oligodendrocytes
Schwann cells
astrocytes
ependymal cells
When a neuron is depolarized:
both Na+ and K+ are inside the membrane.
the Na+ is inside and the K+ is outside the membrane.
the Na+ is outside and the K+ is inside the membrane.
the Na+ and K+ are outside the membrane.
The __ nervous system only contains all the sensory neurons and the voluntary motor neurons.
somatic
autonomic
enteric
central
The time during which the neuron cannot generate another action potential.
refractory period
latent period
threshold period
resting period
Also called a nerve impulse.
action potential
synapse
myelin sheath
hyperpolarization
An increase in the negativity of the membrane potential.
hyperpolarization
depolarization
repolarization
threshold potential
Collection of myelinated nerve fibers in the CNS.
nerve
tract
nucleus
ganglion
A collection of nerve cell bodies in the PNS that relays nerve signals.
ganglion
nucleus
tract
cortex
A process that carries impulses to the cell body of a neuron.
dendrite
axon
soma
synapse
A process that carries nerve impulses away from the cell body.
dendrite
axon
soma
synapse
Which of the following provides myelin for axons in the PNS?
oligodendrocytes
Schwann cells
astrocytes
satellite cells
Nerve cells that integrate information in the CNS are ____ neurons.
efferent
afferent
inter
sensory
Which of the following produces cerebrospinal fluid (CSF)?
oligodendrocytes
Schwann cells
astrocytes
ependymal cells
Repolarization begins with the opening of _____ channels.
sodium
potassium
chloride
calcium
Which ion produces hyperpolarization when it enters a neuron?
sodium
potassium
calcium
chloride
