khalifa

What is a synapse?

• A type of neuron

• A junction for information transfer between neurons or to effector cells

• A type of neurotransmitter

• A glial cell type

Which component of a synapse contains synaptic vesicles?

• Postsynaptic spine

• Synaptic gap

• Presynaptic terminal

• Axon hillock

What is the function of neurotransmitter receptors located on the postsynaptic membrane?

• To release neurotransmitters

• To bind neurotransmitters and initiate a response

• To transport ions

• To synthesize neurotransmitters

What type of synapse is most common in the human nervous system?

• Electrical synapse

• Chemical synapse

• Neurotransmitter synapse

• Mechanical synapse

What occurs when an action potential reaches the presynaptic terminal?

• Depolarization of the postsynaptic neuron

• Opening of voltage-gated Ca2+ channels

• Release of neurotransmitters

• All of the above

What is the primary effect of excitatory neurotransmitters like glutamate?

• Hyperpolarization

• Depolarization

• Inhibition of action potential

• Decrease in Ca2+ influx

What is the synaptic cleft?

• The area where neurotransmitters are synthesized

• The space between presynaptic and postsynaptic membranes

• The location of synaptic vesicles

• The site of action potential generation

Which ions are primarily involved in excitatory postsynaptic potentials (EPSPs)?

• K+

• Na+

• Cl−

• Ca2+

Which ions are primarily involved in inhibitory postsynaptic potentials (IPSPs)?

• Na+

• K+

• Cl−

• Mg2+

How do electrical synapses differ from chemical synapses?

• They use neurotransmitters

• They allow faster signal transmission

• They are more common

• They are always inhibitory