WorksheetsNervous System Physiology
Total questions: 35
Worksheet time: 53mins
At rest, the neuron is inactive or
Polarized
Depolarized
Repolarized
Refectory period
A polarized neuron is
Firing an impulse
More positive inside
More negative inside
Less negative outside
A depolarized neuron can cause
Action potential
Repolarization
Refractory period
Polarization
This must occur before another impulse is sent. Na+ no longer can enter the neuron and K+ diffuses out to restore the electrical gradient
Action potential
Repolarization
Refractory period
Polarization
This is when a neuron cannot fire as it restores its electrical gradient
Action potential
Repolarization
Refractory period
Polarization
What is the type of conduction that occurs when the impulse jumps along the nodes of Ranvier in myelinated neurons?
Saltatory
Excretory
Excitatory
Sweetatory
At resting potential, the ion distribution inside and outside of a neuron is such that __________ ions are most abundant on the outside of the cell, while __________ ions are most abundant on the inside of the cell.
Potassium; sodium
Sodium; potassium
Calcium; potassium
Calcium; sodium
During rapid depolarization of an action potential the current flow (charge of the membrane potential) is dominated by
The inward movement of K+
The outward movement of K+
The inward movement of Na+
The outward movement of Na+
A man develops an immune system disorder that attacks his schwann cells and destroys the myelin sheaths of his nerve cells. What will immediately happen to his nervous tissue as a direct result?
Acetylcholine will stop being released at the nerve cell synapses.
Axons will deliver nerve cell impulses at a much slower rate.
Dendrites will no longer be able to depolarize.
Nerve cell membranes will lose their ability to repolarize.
What is the correct organizational sequence of the nervous system when a stimulus is introduced?
interneuron, afferent, and efferent
efferent, interneuron, and afferent
afferent, efferent, and interneuron
afferent, interneuron, and efferent
A particular medication works by blocking the receptor sites on the post-synaptic neuron. Which structure in synapse is being inhibited from binding to a receptor?
the vesicle
the pre-synaptic neuron
the neurotransmitter
the calcium channel
What is function of the axon terminals?
create myelin
conduct electrical implulses
releases the neurotransmitters of the post synaptic cell.
releases the neurotransmitters of the presynaptic cell.
_______________ transmit impulses from the spinal cord to skeletal and smooth muscles (such as those in your stomach), and so directly control all of our muscle movements.
Autonomic Neurons
Inter Neurons
Motor Neurons
Sensory Neurons
During repolarization, what ions are pumped out of the cell?
sodium
potassium
both sodium and potassium
calcium
Neurotransmitters are released from the
Dendrites
Post-synaptic neuron
Presynaptic neuron
Axon terminal
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
Calcium ions are 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
The critical point at which a stimulus causes an action potential
Synapse
Action potential
Membrane potential
Threshold
