Poop. I don't really know what you are asking but the excretory system removes the stuff from our stomach that we cant use or stuff that already has all of the nutrients that we need removed. Hope this helps
Answer:
Large quantities of water molecules constantly move across cell membranes by simple diffusion, often facilitated by movement through membrane proteins, including aquaporins. In general, net movement of water into or out of cells is negligible. For example, it has been estimated that an amount of water equivalent to roughly 100 times the volume of the cell diffuses across the red blood cell membrane every second; the cell doesn't lose or gain water because equal amounts go in and out. There are, however, many cases in which net flow of water occurs across cell membranes and sheets of cells. An example of great importance to you is the secretion of and absorption of water in your small intestine. In such situations, water still moves across membranes by simple diffusion, but the process is important enough to warrant a distinct name - osmosis.
Answer:
Up and down
Explanation:
In the process of diffusion, a substance tends to move from an area of high concentration to an area of low concentration until its concentration becomes equal throughout a space.
Answer:
b, 8-10
Explanation:
your body needs 20 amino acids to grow, repair and function, however, only nine amino acids are 'essential' as such.
they are histidine, valine, isoleucine, methionine, phenylalanine, threonine, tryptophan, leucine, and lysine
hope this helps! :)
