Synapse Quiz

The chemical messengers (red dots in the image) are sent from the presynaptic neuron to the postsynaptic neuron. What are these messengers called?

• Synapses

• Neurotransmitters

• Inhibitors

• Transgressors

Synapses act as gatekeepers in the nervous system. What does this mean?

• Every stimuli that generates an action potential is sent to the brain. The gatekeeping of the synapses occurs only when the body is unconscious and resting.

• The synapses guard against unwanted pain signals. The synapses prevent very strong stimuli from being passed along to the next neuron.

• The synapses sort through the action potentials, organizing the signals by their types and their location of origin.

• Not every action potential is transmitted to the next neuron. Stimuli must be strong enough or come from enough areas to be passed on.

What type of ion channels open at the axon terminal of the presynaptic neuron?

• Potassium (K)

• Sodium (Na)

• Calcium (Ca)

• Magnesium (Mg)

What holds the neurotransmitter before it binds to the cell membrane on the axon terminal?

• Vacuoles

• Vesicles

• Vehicles

• Ventricles

At what type of synapse are sodium ion channels opened in the postsynaptic neuron?

• Excitatory

• Inhibitory

• Saltatory

• Prohibitory

The concentration of calcium ions is lower on the outside of the cell than the inside of the cell.

• True
• False

Tags

NGSS.HS-LS1-3

Each of the many neurotransmitters will only bind with its specific neurotransmitter receptor.

• True
• False

Excitatory synapses are more common in the body than inhibitory synapses.

• True
• False

Temporal summation occurs from one axon to a dendrite over time.

• True
• False

Sodium ion channels open in the presynaptic neuron which prompts neurotransmitter vesicles to bind with the axon terminal.

• True
• False