The Nervous System - Neuron

Front

What is the myelin sheath?

Back

The myelin sheath is a protective covering that surrounds the axons of some neurons, facilitating faster transmission of electrical signals.

Front

What is multiple sclerosis?

Back

Multiple sclerosis is a disease characterized by the degeneration of the myelin sheath, which slows or interrupts the transmission of neural messages.

Front

What creates an action potential in a neuron?

Back

An action potential is created by the movement of ions across the membrane of the axon.

Front

What are afferent/sensory neurons?

Back

Afferent or sensory neurons are neurons that carry signals toward the central nervous system.

Front

What is the Central Nervous System (CNS)?

Back

The Central Nervous System (CNS) is made up of the brain and spinal cord.

Front

What is the function of neuroglia?

Back

Neuroglia, or glial cells, support and protect neurons, providing structural support and insulation.

Front

What is the role of the node of Ranvier?

Back

The node of Ranvier is a gap in the myelin sheath that facilitates the rapid conduction of nerve impulses.

Front

What are efferent/motor neurons?

Back

Efferent or motor neurons are neurons that carry signals away from the central nervous system to muscles or glands.

Front

What is the function of the myelin sheath?

Back

The myelin sheath insulates axons and increases the speed of electrical signal transmission along the neuron.

Front

What is the difference between the CNS and PNS?

Back

The CNS consists of the brain and spinal cord, while the Peripheral Nervous System (PNS) includes all the nerves outside the CNS.