Lydia Has Been Diagnosed with Early Macular Degeneration

question 106

Multiple Choice

Lydia has been diagnosed with early macular degeneration. Which of the following treatments is her doctor most likely to recommend?

• A) eye drops
• B) removal of the lens of her eye
• C) prescription for glasses
• D) laser surgery

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Definitions:

Voltage-Sensitive

Voltage-sensitive refers to the property of a molecule, ion channel, or membrane to respond to changes in electrical potential or voltage across it.

Sodium Channels

Ion channels found in the membranes of cells, allowing for the passage of sodium ions, important in the generation and conduction of action potentials in neurons and muscle cells.

Cell Membrane

A partial-permeable barrier encasing the cell's cytoplasm, regulating the movement of materials into and from the cell.

Axons

are long, slender projections of nerve cells (neurons) that transmit electrical impulses away from the neuron’s cell body.