Question

STATE FOUR ACTIVITIES IN ANIMALS THAT DEPEND ON DIFFUSION

Answer 1

Answer:Diffusion is a passive process involving the movement of molecules from a region of a higher concentration to one of a lower concentration (the term passive means that the process does not require an input of energy to take place). Diffusion can occur across partially permeable membranes, such as those of surrounding cells. In both plants and animals, diffusion is involved in the movement of important molecules into and out of cells. It is important for the uptake of substances needed by cells, and also the removal of waste products produced by the cells.

Mineral uptake in plants - Useful minerals and ions need to be taken up from soil into plants via root hair cells. These cells are adapted (through a large surface area and a large number) to maximize the rate of diffusion. Therefore, the useful molecules in the soil move down a concentration gradient and into the roots to be taken up by the plant. Many molecules found in the soil are essential for the growth and survival of plants, making diffusion a very important process.

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Answer 2

Diffusion is a passive process involving the movement of molecules from a region of a higher concentration to one of a lower concentration (the term passive means that the process does not require an input of energy to take place). Diffusion can occur across partially permeable membranes, such as those of surrounding cells. In both plants and animals, diffusion is involved in the movement of important molecules into and out of cells. It is important for the uptake of substances needed by cells, and also the removal of waste products produced by the cells.
Mineral uptake in plants - Useful minerals and ions need to be taken up from soil into plants via root hair cells. These cells are adapted (through a large surface area and a large number) to maximize the rate of diffusion. Therefore, the useful molecules in the soil move down a concentration gradient and into the roots to be taken up by the plant. Many molecules found in the soil are essential for the growth and survival of plants, making diffusion a very important process.

Diffusion is an essential function in living organisms. Diffusion is the random but directional movement of molecules from a place of high concentration to a place of low concentration. This simple concept describes the process by which cells exchange toxic gases for life-sustaining gases. It also describes how nerve cells are able to send electrical signals to each other cells. Diffusion tells embryonic cells where to crawl and when they have arrived. Diffusion also makes it possible to reduce the loss of body heat to the surrounding environment.

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