What Happens When the Resting Potential Reaches Threshold Voltage

question 75

Multiple Choice

What happens when the resting potential reaches threshold voltage?

• A) Voltage-gated sodium channels close.
• B) Voltage-gated potassium channels open.
• C) Voltage-gated sodium channels open.
• D) The sodium-potassium pump is turned on.
• E) Resting potassium channels close.

---

Definitions:

Pyroclastic Eruption

A volcanic phenomenon involving the expulsion of hot gases, ash, and volcanic debris.

Dissolved Gas

Gases that are incorporated into magma and can expand, leading to explosive volcanic eruptions as pressure decreases.

Rhyolite

A mostly fine-grained, felsic igneous rock, generally of volcanic origin; can contain glass, volcanic ash, pieces of pumice, and variable amounts of visible crystals (phenocrysts).

Thermal Energy

The internal energy present in a system due to the random movements of its molecules or atoms.