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WorksheetsUnit 2.1.4 Action Potential Part 2 Review Quiz
Total questions: 25
Worksheet time: 25mins
Axon Terminal
B
Dendrite
Axon
Axon Terminal
Cell Body
Action Potential/Electrical Impulse
The action potential arrives at the ____ and depolarizes the ____ membrane.
Axon terminal, pre-synaptic
Axon terminal, post synaptic
pre-synaptic, axon terminal
post synaptic, axon terminal
What happens in an axon terminal when an action potential arrives at the presynaptic membrane?
sodium ions diffuse in
sodium ions diffuse out
calcium ions diffuse in
calcium ions diffuse out
What is Y?
Axon terminal
Neurotransmitters
Dendrite
Synapse
What is the role of the Na+-K+ pump?
To actively transport Na+ and K+ against their electrochemical gradients
To allow Na+ and K+ to move down their electrochemical gradients
To maintain the membrane's impermeability to ions
To depolarize the neuron
What happens when the membrane potential becomes more positive than the resting potential?
The membrane becomes impermeable
The membrane potential remains unchanged
The membrane is depolarized
The membrane is hyperpolarized
What is the primary ion responsible for depolarization in neurons?
Ca2+
Cl-
K+
Na+
What happens when K+ channels open in a neuron?
Na+ moves out of the cell
K+ moves into the cell
K+ moves out of the cell
Na+ moves into the cell
Which ion is more concentrated inside the cell compared to outside in most neurons?
Sodium (Na+)
Potassium (K+)
Chloride (Cl-)
Organic anions
What is the term used to describe a membrane potential that is more negative than the resting potential?
Depolarization
Hyperpolarization
Polarization
Repolarization
