A Mechanism in Which Two Substances Move in Opposite Directions

question 78

Multiple Choice

A mechanism in which two substances move in opposite directions across the cell membrane is called

• A) facilitated diffusion.
• B) vesicular transport.
• C) endocytosis.
• D) countertransport.
• E) osmosis.

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Definitions:

Energy

The capacity to do work, manifesting in forms like heat, light, motion, electrical, chemical energy, and more, fundamentally conserved in nature.

Butane

A gaseous hydrocarbon with the formula \(C_4H_{10}\), used as fuel and a precursor in organic chemistry.

Newman Structure

A way to represent the spatial arrangement of atoms around a carbon-carbon single bond, illustrating staggered or eclipsed conformations.

Line-Angle Structure

A simplified drawing of a molecule where lines represent bonds and vertices represent carbon atoms, excluding hydrogen atoms for clarity.