MS Is Thought to Be

question 5

Multiple Choice

MS is thought to be

• A)an X-linked recessive disorder.
• B)an autoimmune disease induced by an infectious agent.
• C)degeneration of the anterior horn cells due to an environmental toxin.
• D)a slow progressive disorder of the basal ganglia.

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Definitions:

Nematocysts

Specialized cells in cnidarians (like jellyfish) that shoot out a toxic barb in self-defense or to capture prey.

Biradially Symmetrical

A type of symmetry in organisms where the body can be divided into mirror-image halves in two different planes.

Cnidarian

A group of aquatic invertebrates known for their stinging cells, including jellyfish, corals, and sea anemones.

Sponges

Simple aquatic invertebrates known for their porous bodies through which water flows, extracting nutrients and oxygen.