nervous system test

Which of the following is NOT a type of neroglia?

• Astrocyte

• Oligodendrocyte

• Neuron

• Microglial cell

In the central nervous system, myelin is formed by

• Schwann cells.

• oligodendrocytes

• astrocytes

• ependymal cells

The cellular processes of neurons that provide receptive surfaces for input from other neurons are

• neurofibrils

• Nissl fibers

• axons

• dendrites

Masses of myelinated nerve fibers appear

• white

• gray

• brown

• red

What is the primary function of the myelin sheath in a neuron?

• It increases the speed of impulse transmission.

• It provides nutrients to the neuron.

• It generates electrical impulses.

• It connects neurons together.

Which type of cell is responsible for the formation of the blood-brain barrier?

• Oligodendrocytes

• Microglial cells

• Astrocytes

• Neurons

What is the primary role of dendrites in a neuron?

• They generate electrical impulses.

• They transmit impulses away from the cell body.

• They receive signals from other neurons.

• They provide structural support to the neuron.

Ischemic cell damage is caused by lack of blood flow, which deprives cells of

• sodium ions

• potassium ions

• oxygen

• carbon dioxide

An infant's responses to stimuli are coarse and undifferentiated because its nerve fibers

• have not yet appeared

• are not yet capable of action potentials

• have not yet developed connections to the brain

• are not completely myelinated

What is the function of the axon in a neuron?

• It receives signals from other neurons.

• It generates electrical impulses.

• It transmits impulses away from the cell body.

• It provides structural support to the neuron.