Neuroglia and CNS Functions

The video tutorial provides an in-depth overview of the central nervous system (CNS), detailing its components such as the cerebellum, cerebrum, brainstem, and spinal cord. It explains the roles of neurons and neuroglia, including astrocytes, oligodendrocytes, and microglia. The differences between white and gray matter are discussed, along with the structure of the spinal cord and the function of cerebrospinal fluid (CSF). The tutorial also covers the characteristics of pyramidal and Purkinje cells, emphasizing their roles in the CNS.

Which part of the CNS is responsible for supporting and protecting neurons?

• Cerebrum

• Neuroglia

• Cerebellum

• Spinal cord

What is the primary difference between white matter and gray matter in the CNS?

• White matter is primarily axons with myelin sheaths, gray matter is mostly neuron cell bodies.

• Gray matter is lipid-rich, white matter is not.

• Gray matter is found only in the brain, white matter only in the spinal cord.

• White matter contains neuron cell bodies, gray matter does not.

What is the function of ependymal cells in the CNS?

• They transmit nerve impulses.

• They produce cerebrospinal fluid.

• They form the blood-brain barrier.

• They produce myelin sheaths.

Which cells are responsible for forming myelin sheaths in the peripheral nervous system?

• Schwann cells

• Astrocytes

• Oligodendrocytes

• Microglia

Which glial cell type is most abundant in the CNS?

• Schwann cells

• Oligodendrocytes

• Astrocytes

• Microglia

What is the primary role of microglia in the CNS?

• To act as immune cells and remove damaged tissue

• To form myelin sheaths

• To transmit nerve impulses

• To produce cerebrospinal fluid

What is the function of the foot processes of astrocytes?

• To surround capillaries and form the blood-brain barrier

• To form synapses

• To transmit electrical signals

• To produce myelin

What staining technique is used to visualize astrocytes in tissue samples?

• HNE staining

• Silver staining

• Gram staining

• Immunostaining

What is the characteristic shape of pyramidal cells in the cerebral cortex?

• Pyramid-shaped

• Star-shaped

• Round

• Oval

Which layer of the cerebellum contains Purkinje cells?

• Molecular layer

• Between the molecular and granular layers

• Granular layer

• White matter