Neuroscience Quiz

Which part of a neuron integrates incoming signals?

• Axon

• Dendrites

• Soma (cell body)

• Synapse

What is the primary function of myelination?

• Increase neurotransmitter release.

• Speed up action potential conduction.

• Regulate extracellular ion balance.

• Produce cerebrospinal fluid.

What is the role of astrocytes in the brain?

• Produce cerebrospinal fluid.

• Phagocytose debris and pathogens.

• Maintain the blood-brain barrier.

• Generate action potentials.

During which phase of an action potential do voltage-gated Na⁺ channels open?

• Resting phase

• Depolarization

• Repolarization

• Hyperpolarization

During the __________ phase of an action potential, K⁺ exits the cell, restoring the negative membrane potential.

A __________ is a cluster of neuron cell bodies in the CNS.

A __________ is the small gap where neurotransmitters are released between neurons.

The nodes of Ranvier are critical for saltatory conduction.

• True

• False

Microglia are responsible for producing myelin in the CNS.

• True

• False

What is the primary function of oligodendrocytes?

• Produce cerebrospinal fluid.

• Phagocytose pathogens.

• Create myelin in the CNS.

• Regulate ion balance.