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WorksheetsSynaptic transmission
Total questions: 47
Worksheet time: 3hrs 34mins
Name
Class
Date
1.
During an action potential, the inside of the cell becomes negatively charges for a second
a)
True
b)
False
2.
Each neuron is separated from the next by a gap called the syntax
a)
True
b)
False
3.
Although there are 3 different types, all neurons share the same basic structure
a)
True
b)
False
4.
Neurons vary in size from a millimeter to a meter long
a)
True
b)
False
5.
During synaptic transmission, neurotransmitters are released from syntactic ventricles
a)
True
b)
False
6.
Sensory neurons
a)
Carry messages from the CNS to effectors
b)
Carry messages from sensory to motor neurons
c)
Are efferent
d)
Carry messages to the brain and spinal cord
7.
Relay neurons are found in
a)
The brain and the spine
b)
Just the spine
c)
Just the brain
d)
The eyes, ears, tongue and skin
8.
Excitation
a)
Has no effect on the neighboring neuron
b)
Makes it less likely the neighboring neuron will fire
c)
Bypasses the neighboring neuron
d)
Makes it more likely the neighboring neuron will fire
9.
The Myelin Sheath
a)
Includes the nucleus
b)
Speeds up the transmission of nerve impulses down the neuron
c)
Carries nerve impulses away from the cell body
d)
Sends impulses to next neuron across the synapse
10.
The nucleus is
a)
in the cell body
b)
in the dendrites
c)
in the axon
d)
in the nodes of ranvier
11.
The operation of the sodium-potassium "pump" moves:
a)
sodium & potassium ions into the cell
b)
sodium & potassium ions out of the cell
c)
sodium ions into the cell & potassium ions out of the cell
d)
sodium ions into the cell & potassium ions out of the cell
12.
Name the ion that is pumped into the axon to maintain resting potential.
a)
Calcium
b)
Hydrogen
c)
Potassium
d)
Sodium
13.
What describes the phase of quick entry of sodium ions into an axon during an action potential?
a)
passive transport
b)
depolarization
c)
ion transport
d)
repolarization
14.
What generates a nerve impulse on the post-synaptic membrane?
a)
Calcium binding with a receptor site
b)
Potassium leaking into the post-synaptic membrane
c)
Neurotransmitter binding with receptor sites
d)
Neurotransmitter being removed from the synapse
15.
Neural transmission across a synaptic cleft is accomplished by:
a)
the movement of sodium & potassium from the presynaptic neuron to the postsynaptic neuron.
b)
impulses traveling as electrical currents across the gap.
c)
impulses causing the release of a neurotransmitter signal and its diffusion across the gap.
d)
impulses ricocheting back and forth across the gap.
16.
-70 mV is the measure of a
a)
Threshold Potential
b)
Action Potential
c)
Resting Potential
d)
End Point Potential
17.
A membrane potential becoming less negative is called
a)
hyperpolarization
b)
depolarization
c)
repolarization
d)
polarization
18.
When a neuron is depolarized, what are the first channels to open?
a)
Sodium
b)
Potassium
c)
Calcium
d)
ACTH
19.
What number on the graph represents the Hyperpolarization phase?
a)
1
b)
2
c)
3
d)
4
20.
Name the ion that is pumped into the axon to maintain resting potential.
a)
Calcium
b)
Hydrogen
c)
Potassium
d)
Sodium
21.
W
a)
Axon terminal
b)
Neurotransmitters
c)
Postsynaptic membrane
d)
Synapse
22.
Neurotransmitters are released from the
a)
Dendrites
b)
Post-synaptic terminal
c)
Presynaptic terminal
d)
Axon
23.
X
a)
Axon Terminal Button
b)
Neurotransmitters
c)
Dendrite
d)
Synapse
24.
Y
a)
Axon Terminal
b)
Neurotransmitters
c)
Dendrite
d)
Synapse
25.
Z
a)
Dendrite
b)
Axon Terminal
c)
Neurotransmitters
d)
Synapse
26.
Skeletal Muscle contraction is initiated when the ________ sends a message to the muscle cell.
a)
Muscle cell
b)
Neuron
c)
Gland
d)
None of the above
27.
The neurotransmitter that signals muscle contraction is called...
a)
Acetylcholine
b)
Myosin
c)
Actin
d)
Calcium
28.
The neurotransmitter that signals muscle contraction is called...
a)
Acetylcholine
b)
Myosin
c)
Actin
d)
Calcium
29.
Region where a motor neuron comes in close contact with a muscle cell.
a)
neurotransmitter
b)
muscular dystrophy
c)
muscle tension
d)
neuromuscular junction
30.
Identify one factor that can cause the first sodium channel to open in a muscle cell.
a)
Calcium ions being released from the sarcoplasmic reticulum.
b)
Acetylcholine from a motor neuron attaching to a receptor on muscle fiber.
c)
Calcium ions binding to troponin
d)
ATP causing the myosin heads to pop up.
31.
What is the charge inside the axon when the neuron is "at rest"?
a)
-70 mV
b)
-55 mV
c)
40 mV
d)
55 mV
32.
Why does hyperpolarization occur during an Action Potential?
a)
Na+ channels open first
b)
K+ channels open second
c)
K+ channels are slow to close
d)
The Na+ / K+ pump is always working
33.
This muscle type is involuntary and lines hollow organs, airways and blood vessels:
a)
Smooth
b)
Cardiac
c)
Skeletal
34.
Synaptic vesicles:
a)
Contain Calcium ions
b)
Contain Neurotransmitters
c)
Contain Receptors
d)
All of the above
35.
Which is the correct sequence in the transmission of a neural impulse?
a)
axon, dendrite, cell body, synapse
b)
dendrite, axon, cell body, synapse
c)
synapse, axon, dendrite, cell body
d)
dendrite, cell body, axon, synapse
36.
Multiple sclerosis is an autoimmune disease in which the body's own immune system destroys the _____________ of the nerve axons.
a)
Myelin
b)
Dendrites
c)
Axon Terminal
d)
Nodes of Ranvier
37.
An axon conducts nerve impulses _________ the cell body.
a)
away from
b)
toward
c)
both toward and away
d)
around, bypassing
38.
The brain's supporting cells are called:
a)
glial cells
b)
mitochondria
c)
neurons
d)
nuclei
39.
Neurons that travel toward the central nervous system are called
a)
afferent neurons
b)
efferent neurons
c)
exit neurons
d)
CNS neurons
40.
Impulses that travel down a myelinated neuron move faster than if it was unmyelinated.
a)
True
b)
False
c)
I'm not sure
41.
The gap that a message has to cross to get from one neuron to the other is called the _____
a)
synapse
b)
dendrite
c)
axon
d)
synaptic cleft
42.
What part of the neuron is myelinated?
a)
Cell Body
b)
Axon
c)
Synapse
d)
Dendrite
43.
W
a)
Axon Terminal Button
b)
Neurotransmitters
c)
Dendrite
d)
Synapse
44.
_____ neurons carry messages to the central nervous system
a)
Motor
b)
Inter
c)
Sensory
d)
Fun
45.
The spaces between the covered parts of an axon are called:
a)
synaptic clefts
b)
nodes of Ranvier
c)
Ventricles
d)
Vesicles
46.
Z
a)
Dendrite
b)
Axon Terminal
c)
Neurotransmitters
d)
Synapse
47.
X
a)
Axon Terminal Button
b)
Neurotransmitters
c)
Dendrite
d)
Synapse
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