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WorksheetsNeurons, Synapses, and Signaling
Total questions: 10
Worksheet time: 5mins
What part of the neuron receives incoming messages from other cells?
nucleus
cell body
dendrites
synaptic terminals
What structure(s) aid in speeding up synaptic transmission across the axon?
Nodes of Ranvier
dendrites
myelin sheath
both Nodes of Ranvier and the myelin sheath
The central nervous system
consists of the brain and spinal cord
consists of the nerves that communicate motor and sensory signals throughout the rest of the body
Structure D represents
a sensory neuron
a motor neuron
an internueron
a sensory receptor
Structure B represents
a sensory receptor
an interneuron
a motor neuron
a sensory neuron
During which stage of this action potential do sodium ions (Na+) flow through the sodium channels from the outside of the membrane to the inside of the membrane?
threshold
depolarization
repolarization
refractory period
During which stage of the action potential does the membrane return to its resting state?
undershoot to threshold
depolarization
rising phase of the action potential
falling phase of the action potential
An action potential
is another name for a nerve impulse
is an all or none response to the depolarization of the membrane of the nerve cell
cannot occur unless the nerve cell is at its resting potential
all of these answers are correct
What is released by the presynaptic membrane into the synaptic cleft?
neurotransmitters
excitatory neurotransmitters
inhibitory neurotransmitters
all of these are released by the presynaptic membrane
The sodium-potassium pump
uses diffusion to attain -70mV
uses ATP to create a membrane differential along the axon
is stimulated by neurotransmitters
is an example of passive transport across a membrane
