What substances move into and out of cells by diffusion?

Answer 1

diffusion- substances move across the cell membrane from areas of high concentration to areas of low concentration osmosis is the diffusion of water across a cell membrane (area of high concentration to an area of low concentration)

Answer 2

Osmosis is responsible for the passage of water across the membrane. Simply put osmosis means that water will travel from and area where there is more water (e.g. outside a cell) to an area where there is less water (e.g. inside the cell).

There are a few types of diffusion:

1. Simple diffusion: Small molecules such as O2 and ethanol can pass across membranes easily.

2. Facilitated diffusion: Some molecules bind to a membrane bound protein which carries them across the membrane.

3. Active Transport: This occurs when a molecules bonds to a a membrane bound pump which requires energy (ATP) to bring the molecules across the membrane.

Answer 3

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. Gas exchange in gills and lungs operates by this process. Carbon dioxide is produced by all cells as a result of cellular metabolic processes. Since the source is inside the cell, the concentration gradient is constantly being replenished, thus the net flow of CO2 is out of the cell. Metabolic processes in animals and plants usually require oxygen, which is in lower concentration inside the cell, thus the net flow of oxygen is into the cell.

Osmosis is the diffusion of water across a semi-permeable (or differentially permeable or selectively permeable) membrane. The cell membrane, along with such things as dialysis tubing and cellulose acetate sausage casing, is such a membrane. The presence of a solute decreases the water potential of a substance. Thus there is more water per unit of volume in a glass of fresh-water than there is in an equivalent volume of sea-water. In a cell, which has so many organelles and other large molecules, the water flow is generally into the cell.

Answer 4

They eat a lot of Tacos causing them to get sick and have horrible stomach aches and cause them to eat the other cells and kill the people.

Answer 5

water and starch :)

^The process when water diffuses into or out of a cell is called osmosis.

Answer 6

Yes, diffusion does allow materials to movement in and out of the cell. It can be caused by a process of simple diffusion or facilitated diffusion.

Answer 7

Golgi body

Answer 8

Through semipermeable membarane.

Answer 9

by cell membrane