You Are Reading the Chapter of Your Textbook That Covers

question 28

Multiple Choice

You are reading the chapter of your textbook that covers mental retardation, and you come to a discussion of rubella, human immunodeficiency virus, syphilis, and encephalitis. They are all included in the same section of this chapter because they are all

• A) caused by recessive gene pairings.
• B) infectious diseases that can cause mental retardation.
• C) the most common forms of death for people with severe and profound mental retardation.
• D) the result of per-natal and peri-natal complications.

---

Definitions:

ACh

Acetylcholine, a neurotransmitter involved in muscle activation, memory, and learning.

Flaccid Paralysis

A medical condition characterized by weakness or paralysis and reduced muscle tone without an obvious cause.

Acetylcholinesterase

An enzyme that breaks down the neurotransmitter acetylcholine, terminating its action at the neural synapse.

Action Potentials

Rapid and temporary changes in the electrical membrane potential of a cell, allowing for the transmission of signals along neurons.