Demyelinating Diseases Such as Multiple Sclerosis Disrupt Normal Neural Communication

question 34

Multiple Choice

Demyelinating diseases such as multiple sclerosis disrupt normal neural communication by

• A)destroying receptors on postsynaptic cells so that neurotransmitters cannot bind normally.
• B)creating lesions in the blood-brain barrier that allow toxic substances to enter the brain from the bloodstream.
• C)causing deterioration of the fatty substance that normally coats and insulates axons.
• D)diminishing the activity of the sodium-potassium pumps that usually maintain the resting potential of neurons.

Define and differentiate between frictional, structural, and cyclical unemployment.

Assess the role of sectoral shifts in creating temporary unemployment.

Discuss the advantages and disadvantages of unemployment insurance.

Explain the natural rate of unemployment.