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marwana246534
Oxygen is taken into cells by the process of diffusion osmosis respiration . (ii) Cells need oxygen for breathing photosynthesis respiration . (iii) The parts of cells that use up the most oxygen are the membranes mitochondria nuclei.
luisvaschetto

Oxygen is taken into cells by the process of simple DIFFUSION.

  • Simple diffusion is a cellular process by which small molecules (e.g., oxygen and carbon dioxide) pass across the plasma membrane and thus can enter and leave the cell.

  • Simple diffusion always occurs in favor of a concentration gradient, i.e., from a region of high concentration to a region of low concentration.

  • For example, oxygen (O2) molecules move from a region of high concentration in the lungs to a region of low concentration in the blood.

  • This process (diffusion) does not require energy to move molecules across biological membranes.

In conclusion, oxygen is taken into cells by the process of simple DIFFUSION.

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