Quiz: The Synapse

1. Which of the following ions cause the presynaptic vesicles to fuse with the presynaptic membrane and release a neurotransmitter into the synaptic area?
a. calcium
b. sodium
c. potassium
2. When calcium ions enter and cause the release of a neurotransmitter, the neurotransmitter will bind to the receptors on the __________.
a. synapse
b. presynaptic membrane
c. postsynaptic membrane
3. In order for an impulse to be transmitted from one neuron to the next or from a neuron to its destination, a neurotransmitter must be released from __________.
a. within the soma
b. the terminal end of the axon
c. the terminal end of the dendrite
4. When an action potential reaches the end of the axon, calcium ion channels will open and allow calcium ions to enter the axon. What is the function of those calcium ions?
a. Calcium ions cause the synaptic vesicle to enter into the synaptic area and release its neurotransmitter, which will bind to the postsynaptic membrane.
b. Calcium ions cause the synaptic vesicle to move and fuse with the presynaptic membrane. The vesicle then releases its neurotransmitter into the synaptic area
c. Calcium ions will bind to the postsynaptic membrane. This will cause an action potential to occur in the next neuron.

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