How do substances move in and out of the cell ?
Answers
Explanation:
Substances move in and out of the cell by diffusion down a concentration gradient, through a practically permeable membrane
Answer:
The substances move in and out of the cell through the cell membrane.
Explanation:
All cells have a cell membrane. This cell membrane controls what goes into and out of the cells. Some substances, such as gases and water, can pass across the membrane easily by a diffusion process. However, other substances, such as glucose, must be transported across the cell membrane.
A molecule is two or more atoms joining together to form a single chemical entity. Each particle carries a certain number of electrons that orbit around the nucleus. The nucleus consists of protons & neutrons of different numbers in different types of elements.
- Diffusion: Diffusion is the movement of molecules from a region of higher concentration to an area of lower concentration down the concentration gradient. Oxygen, carbon dioxide, and anything dissolved in lipids (lipid soluble) can enter and exit the cell through diffusion. The diffusion applies to the movement of any molecule through any medium –solid, liquid or gas.
- Osmosis -This is a process by which the solvent molecules pass from a solution of lower concentration to a higher concentration through a semi-permeable membrane. It is a passive process which takes place without any expenditure of energy.
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Which of the following cell organelles regulates the entry and exit of molecules to and from the cell?
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