In 2012,the Largest Sector as a Fraction of Exports from the U.S.economy

question 207

Multiple Choice

In 2012,the largest sector as a fraction of exports from the U.S.economy was:

• A) food and beverages.
• B) capital goods.
• C) consumer goods.
• D) services.

---

Definitions:

Voltage-Gated Channels

Protein channels in cell membranes that open or close in response to changes in electrical potential, allowing ions to pass in and out of the cell.

Repolarization

The process by which cells, particularly nerve and muscle cells, restore their membrane potential to a resting state after depolarization.

All-Or-None Response

A principle that states that nerve or muscle fibers respond to stimuli at their threshold with a complete response or not at all.

Stimulus

Anything that can invoke a physiological response or reaction from an organism or a cell.