BIO 112 Ch. 9 Flashcard

Front

What are the three layers of the meninges?

Back

The three layers of the meninges are the dura mater (outer layer), arachnoid mater (middle layer), and pia mater (inner layer).

Front

What is the primary function of myelination in the nervous system?

Back

The primary function of myelination is to insulate nerve fibers and increase the speed of electrical impulses.

Front

How many pairs of spinal nerves are present in the human body?

Back

There are 31 pairs of spinal nerves in the human body.

Front

How many pairs of cranial nerves are there in humans?

Back

There are 12 pairs of cranial nerves in humans.

Front

Where are multipolar neurons primarily located?

Back

Multipolar neurons are primarily located in the brain and spinal cord.

Front

What is the role of the dura mater?

Back

The dura mater serves as the outer protective layer of the meninges surrounding the brain and spinal cord.

Front

What is the significance of the arachnoid mater?

Back

The arachnoid mater is the middle layer of the meninges, providing a cushioning effect and containing cerebrospinal fluid.

Front

What type of neurons are typically found in sensory pathways?

Back

Unipolar neurons are typically found in sensory pathways, transmitting sensory information to the central nervous system.

Front

What is the function of oligodendrocytes?

Back

Oligodendrocytes are responsible for forming myelin sheaths around axons in the central nervous system.

Front

What is the difference between afferent and efferent neurons?

Back

Afferent neurons carry sensory information to the central nervous system, while efferent neurons transmit motor commands from the central nervous system to muscles.