What Is the Second Most Commonly Recognized Genetic Cause of Mental

question 27

Multiple Choice

What is the second most commonly recognized genetic cause of mental retardation?

• A) Down syndrome
• B) Fragile X syndrome
• C) Klinefelter syndrome
• D) Turner syndrome

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Definitions:

Brain

Central control organ of a nervous system; receives and integrates sensory information, regulates internal conditions, and sends out signals that result in movements.

Voltage-gated Sodium

Channels that open or close in response to changes in membrane potential, allowing sodium ions to enter or exit cells, critical for the generation and conduction of electrical signals in neurons.

Potassium Channels

Protein channels in cell membranes that specifically allow potassium ions to pass through, playing key roles in maintaining cell potential and regulating cellular processes.

Trigger Zone

An area of the neuron, typically located at the axon hillock, where action potentials are initiated.