WorksheetsNerve Impulse Transmission
Total questions: 25
Worksheet time: 25mins
Nerve impulse transmission refers to the ability of the neuron to...
reproduce
receive an chemical signal
produce sodium or potassium
send an electrochemical signal
Which of the following can be observed during the 2nd period of the graph?
K+ gates open
Na+ gates open
Na+/K+ pump opens
Na+ and K+ gates open
Which of the following does not affect the transmission speed of a neuron cell?
the diameter of the nerve fiber
the presence of myelin in the nerve cell
temperature
the strength of the stimulus
What is the gap between the axon terminal of one neuron and the dendrite of the next neuron called?
Synapse
Node of Ranvier
Joint
Neuromuscular Junction
What is the general name for the chemicals in the nervous system that allow messages to be passed across the synapse?
Amino Acid
Enzyme
Hormone
Neurotransmitter
Once action potential occurs at one spot on the neuron's membrane it...
causes the immediate release of neurotransmitters
stops action potential at the adjacent spots
causes depolarization in adjacent membrane
causes repolarization in the adjacent membrane
When the action potential impulse is traveling down the axon and it "jumps over" the myleninated sections of the axon to make the impulse move faster, this is known as -
impulse momentum
electric current
saltatory conduction
nodes of Ranvier
What is saltatory conduction?
when the threshold potential is reached
when the action potential jumps from node to node
when the neurone becomes hyperpolarised
Identify Z
Dendrite
Axon Terminal
Neurotransmitters
Synapse
X
Axon Terminal Button
Neurotransmitters
Synapse
Synaptic cleft
What generates a nerve impulse on the post-synaptic membrane (dendrite)?
Calcium binding with a receptor site
Potassium leaking into the post-synaptic membrane
Neurotransmitter binding with receptor sites on protein channel
Neurotransmitter being removed from the synapse
Through which type of nerve fibers do impulses travel fastest?
Unmyelinated
Myelinated
Somatic
Autonomic
The sodium potassium pump...
is energy (ATP) free as sodium and potassium move in and out by diffusion as needed
moves 3 sodium ions into the neuron and 3 potassium out only if ATP is present
moves 3 sodium in to the neuron and 2 potassium without energy from ATP
moves 3 sodium out of the neuron and 2 potassium into the neuron only if there is energy from ATP
What is the most important factor required to maintain membrane potential
A reactive sodium pore
The sodium potassium pump
The release of neurotransmitters at the synaptic terminal
the the movement of water from high to low concentrations over the neuron's membrane
Threshold stimulus means that
the size of the action potential does not change
only one impulse is conducted at a time
a certain level of stimulus is required to generate an action potential
the membrane becomes repolarised quickly after an action potential passes
A change in the external environment that initiates an impulse is known as a
synapse
response
stimulus
receptor
The voltage difference between the inside (-) and the outside (+) of the neuron in the resting state is called........
neutral state
active transport
action potential
resting membrane potential
The resting membrane potential is:
+40mV
-70mV
-20mV
0 mV
Neurotransmitters are released from the
Dendrites
Post-synaptic neuron
Presynaptic neuron
Axon
calcium is responsible for
signaling the release of the neurotransmitter
signaling Na to be released into the membrane
signaling the release of K out of the membrane
serving as the neurotransmitter
Calcium channels on the axon terminal are _______ gated.
Voltage
Chemically
Mechancially
What is the primary ion responsible for depolarization during a nerve impulse?
Sodium (Na+)
Potassium (K+)
Calcium (Ca2+)
Chloride (Cl-)
Which part of the neuron is primarily responsible for receiving signals from other neurons?
Axon
Dendrite
Cell body
Myelin sheath
During an action potential, what is the role of the sodium-potassium pump?
To depolarize the neuron
To repolarize the neuron
To maintain the resting membrane potential
To release neurotransmitters
What happens at the synapse when a nerve impulse reaches the axon terminal?
Neurotransmitters are released into the synaptic cleft
The axon terminal depolarizes the next neuron directly
Ions flow directly into the next neuron
The synaptic cleft closes
