Myelin Sheath Overview

These flashcards cover the structure, function, production, and symptoms related to the myelin sheath.

A myelin sheath is __.

An insulating layer that forms around nerves, allowing electrical impulses to transmit quickly and efficiently.

The myelin sheath is produced by __ in the peripheral nervous system.

Schwann cells.

In the central nervous system, myelin is produced by __.

Oligodendrocytes.

Loss of myelin sheaths can result in __.

Symptoms such as vision loss, eye p
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5ain, numbness, weakness, or paralysis.

Myelin is primarily made up of and .

Protein and fatty substances.

One possible symptom of myelin sheath loss is __.

Loss of bladder and bowel control.

A myelin sheath is __.

An insulating layer that forms around nerves, allowing electrical impulses to transmit quickly and efficiently.

The myelin sheath is produced by __ in the peripheral nervous system.

Schwann cells.

In the central nervous system, myelin is produced by __.

Oligodendrocytes.

Loss of myelin sheaths can result in __.

Symptoms such as vision loss, eye pain, numbness, weakness, or paralysis.

Myelin is primarily made up of ** and .

Protein and fatty substances.

One possible symptom of myelin sheath loss is __.

Loss of bladder and bowel control.

One oligodendrocyte in the CNS can myelinate __ axons, while a Schwann cell in the PNS myelinates only one axon.

Multiple.

The process of forming a myelin sheath is called __.

Myelination.

In the CNS, the unmyelinated gaps between myelinated segments are known as __.

Nodes of Ranvier.

Myelination in the CNS typically begins during __ development and continues into __.

Fetal; early adulthood.

A myelin sheath is 

An insulating layer that forms around nerves, allowing electrical impulses to transmit quickly and efficiently.

The myelin sheath is produced by ****__ in the peripheral nervous system.

Schwann cells.

In the central nervous system, myelin is produced by ****__.

Oligodendrocytes.

Loss of myelin sheaths can result in ****__.

Symptoms such as vision loss, eye pain, numbness, weakness, or paralysis.

Myelin is primarily made up of ****__ and ****__.

Protein and fatty substances.

One possible symptom of myelin sheath loss is ****__.

Loss of bladder and bowel control.

One oligodendrocyte in the CNS can myelinate ****__ axons, while a Schwann cell in the PNS myelinates only one axon.\n\n\n\n

Multiple.\n\n\n\n

The process of forming a myelin sheath is called ****__.\n\n\n\n

Myelination.\n\n\n\n

In the CNS, the unmyelinated gaps between myelinated segments are known as ****__.\n\n\n\n

Nodes of Ranvier.\n\n\n\n

Myelination in the CNS typically begins during ****__ development and continues into ****__.\n\n\n\n

Fetal; early adulthood.\n\n\n\n

The ****__ joint, connecting the humerus and scapula, is a ball and socket joint known for its wide range of motion.\n\n\n\n

Shoulder.\n\n\n\n

The elbow joint is a ****__ joint, primarily allowing for flexion and extension of the forearm.\n\n\n\n

Hinge.\n\n\n\n

The radiocarpal joint allows for movements such as flexion, extension, abduction, adduction, and circumduction, classifying it as a ****__ joint.\n\n\n\n

Condyloid.\n\n\n\n

The hip joint, a ****__ joint, connects the femur to the acetabulum of the pelvis, providing stability and weight-bearing capability.\n\n\n\n

Ball and socket.\n\n\n\n

The body's largest synovial joint, the knee, is a complex modified ****__ joint that allows for flexion, extension, and some rotation.\n\n\n\n

Hinge.\n\n\n\n

The talocrural joint, otherwise known as the ****__ joint, is a hinge joint formed by the tibia, fibula, and talus, allowing for dorsiflexion and plantarflexion.\n\n\n\n

Ankle.\n\n\n\n