During Depolarization of the Plasma Membrane

question 120

Multiple Choice

During depolarization of the plasma membrane,

• A) Na⁺ moves rapidly into the cell.
• B) K⁺ moves rapidly out of the cell.
• C) membrane permeability to Na⁺ decreases.
• D) the outside of the cell becomes positively charged relative to the inside.
• E) Na⁺ moves rapidly out of the cell.

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Definitions:

Huntington Disease

Hereditary disease characterized by chorea (ceaseless involuntary jerky movements) and progressive dementia, ending in death.

Tay-Sachs Disease

Inherited birth defect caused by the loss of genes that encode the enzyme necessary for breaking down certain fatty substances; appears 4 to 6 months after birth and results in intellectual disability, physical changes, and death by about age 5.

Genetic Errors

Flaws or mutations in an organism's DNA sequence that can lead to diseases, disorders, or physical variations.