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WorksheetsNeurons, synapses and signaling
Total questions: 13
Worksheet time: 9mins
The interplay of multiple excitatory and inhibitory inputs most affects what part of a neuron?
axon hillock
dendrites
the nucleus
the neuron's cytoskeleton
the axon
How are neurons structurally adapted to chemically transmit impulses to neighboring neurons?
They have numerous nodes of Ranvier.
Axon terminals contain neurotransmitter within synaptic vesicles.
They have numerous dendrites.
They have Schwann cells that surround axons.
None of the listed responses is correct.
Schwann cells make up the (a) .
An action potential is _____.
a traveling wave of depolarization in the neuron membrane
a sudden increase in speed by the sodium-potassium pump
a brief neutralization of the charges on sodium and potassium ions
a sudden reversal of the sodium-potassium pump
None of the listed responses is correct.
A neuron that transmits an impulse to the central nervous system after the neuron is stimulated by the environment is called a(n) (a)
Which of the following is specifically a part or a function of the central nervous system?
sensory receptors
sensory input
dendrites
motor output
integration
Cells that provide metabolic and structural support to the neurons are called (a) .
In descriptions of synapse organization, the _____ cell is the transmitting neuron and the _____ is the neuron, muscle, or gland cell that receives the signal.
(a)
Which of the following is a mechanism by which neurotransmitters can be rapidly cleared from the synaptic cleft?
The neurotransmitters are actively transported back into the presynaptic cells to be repackaged into synaptic vesicles.
The neurotransmitters are actively transported into glia to be metabolized as fuel.
Neurotransmitters are removed by simple diffusion.
Neurotransmitters are removed by enzymes that catalyze hydrolysis of the neurotransmitter.
What ion enters the axon terminus during an action potential, and results in the release of neurotransmitter into the synapse?
potassium ions
chloride ions
sodium ions
calcium ions
In the nervous system, the strength of the stimulus is coded into:
The frequency of action potentials generated
The amplitude of action potentials generated
If the stimulation of a cell is strong, the strength of the action potential produced would be:
Weaker than that produced by weak stimulation
Twice that produced by weak stimulation
No different to that produced by weak stimulation
Stronger than that produced by weak stimulation
None of the above is correct
The hyperpolarization phase of the action potential is due to:
the opening of voltage-gated Cl− channels
the closure of resting Na+ channels
due to the closure of Cl− channels
the prolonged opening of voltage-gated K+ channels
None of the above
