In Guillain-Barre Syndrome, the Immune System Attacks and Degrades the Myelin

question 90

Multiple Choice

In Guillain-Barre syndrome, the immune system attacks and degrades the myelin sheath of PNS axons. Predict the effect this will have on nerve impulse and motor function.

• A)Lost insulation from myelin will cause neurons of the PNS to be hyper-excitable and muscular spasms will result.
• B)Motor signals will not be sent from the brain down the efferent pathway because the brain cannot generate them.
• C)The brain will slowly degrade and various brain functions will be lost, including motor functions.
• D)Lost insulation from myelin will cause neurons of the PNS to lose saltatory conduction, resulting in poor muscle function.

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Definitions:

Congenital Hypothyroidism

A condition present at birth where the thyroid gland produces insufficient amounts of thyroid hormone, crucial for growth and metabolism.

Prenatal

Relating to the period of time before birth, encompassing the development and care of the fetus during pregnancy.

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Seizures that involve repetitive, jerking muscle movements, typically affecting both sides of the body.