PLEASE, PLEASE, PLEASE HELP!!! REAL ANSWERS ONLY!!! NO LINKS OR I WILL REPORT!!! NO BOTS EITHER!!! I HAVE MADE THIS QUESTION ALM
OST 5 TIMES PLEASE HELP I'M GONNA CRY!!! Respond to the question: How do things move across a cell membrane? Give two examples. (5-8 sentences)
https://www.khanaca demy.org/gclassroom/test-prep/mcat/cells/transport-across-a-cell-membrane/v/how-do-things-move-across-a-cell-membrane
That is the video. Remove the space to make it work.
Materials move within the cell 's cytosol by diffusion, and certain materials move through the plasma membrane by diffusion. ... Diffusion: Diffusion through a permeable membrane moves a substance from an area of high concentration (extracellular fluid, in this case) down its concentration gradient (into the cytoplasm). Water, carbon dioxide, and oxygen are among the few simple molecules that can cross the cell membrane by diffusion (or a type of diffusion known as osmosis ). Diffusion is one principle method of movement of substances within cells, as well as the method for essential small molecules to cross the cell membrane.The cell membrane controls what goes in and out by having protein channels that act like funnels in some cases and pumps in other cases. ... Active transport requires energy, because protein machines actively grab molecules on one side of the membrane and push them through to the other side
Auxin moves to the darker side of the plant, causing the cells there to grow larger than corresponding cells on the lighter side of the plant. This produces a curving of the plant stem tip toward the light, a plant movement known as phototropism. Auxin also plays a role in maintaining apical dominance
