Multiple sclerosis is a disease that involves: a. the degeneration of patches of the myelin sheath that causes the transmission of neural messages to be slowed or interrupted. b. an abnormal increase in the thickness of the myelin sheath, blocking the release of neurotransmitters. c. the gradual decline in the ability of neurons to produce glial cells. d. dendrites becoming brittle and breaking.

The answer is a. the degeneration of patches of the myelin sheath that causes the transmission of neural messages to be slowed or interrupted.

Explanation:

Multiple sclerosis is a disease in which there is deterioration of the myelin sheath that is around the central nervous system (nerve fibres of the spinal cord, optic nerves, and brain), leading to impairment of nerve impulses, and problems with seeing, speaking, sensing, and moving various parts of the body.

absolute poverty the condition of having too little income to buy the necessities-- food, shelter, clothing, health care.

achieved status a social position (status) obtained through an individual's own talents and efforts.

affirmative action the requirement that employers make special efforts to recruits hire and promote qualified members of previously excluded groups including women and minorities.

aggregate a collection of unrelated people who do not know one another but who may occupy a common space--for example, a crowd of people crossing a city street.

agrarian societies societies in which large scale cultivation using plows and draft animals is the primary means of subsistence.

alienation the separation or estrangement of individuals from themselves and from others.

amalgamation the biological as well as cultural assimilation (merging) of racial or ethnic groups.

anomalies in science observations or problems that cannot be explained or solved in terms of a prevailing paradigm.

anomie a breakdown or confusion in the norms, values, and culture of a group or a society. a condition of relative normlessness.

anomie theory the theory suggesting that deviance and crime occur when there is an acute gap between cultural norms and goals and the socially structured opportunities for individuals to achieve those goals.

anticipatory socialization the process of taking on the attitudes values and behaviors of a status or role one expects to occupy in the future.

apartheid the recent policy of racial separation in south africa enforced by leg

explanation: