Question

question 36 (2 points) which of the following correctly describes one method of transport across a cell membrane? facilitated diffusion - requires a protein carrier, but no cellular energy osmosis - the powered transport of molecules to create a concentration gradient active transport - the engulfing of material outside of a cell by rearrangement of its cell membrane diffusion - energetically expensive pumping of material out of cells all of these are correct descriptions

Explanation:

Facilitated diffusion uses protein carriers to move substances down their concentration gradient without using cellular energy (ATP). Osmosis is the diffusion of water across a semi - permeable membrane, not the powered transport to create a gradient. Active transport uses energy to move substances against their concentration gradient, not the engulfing of material (which is endocytosis/exocytosis). Diffusion is the passive movement of substances from high to low concentration and is not energetically expensive pumping.

Answer:

A. facilitated diffusion - requires a protein carrier, but no cellular energy