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Why do cells such as those on a surface of a root expend energy to take up some substances?
Wiki User
∙ 13y ago
most of the nutrients are too big to pass through the cell membrane and must therefore be broken down by enzymes before they can be absorbed. to create those enzymes, it costs energy
Wiki User
∙ 13y ago
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What help maintain homeostasis in cells does not require energy?
Simple diffusion and osmosis help maintain homeostasis in cells and do not require the cell to expend energy.
When carbohydrates are not available where do cells get energy?
They convert other substances (such as fat in the instance of animal cells) into carbohydrates
Cells are limited in size by the?
a. rate at which substances needed by the cell can enter the cell through its surface.
Move substances along the surface of cells?
Flagella, pseudopodia. cilia
Why can small cells exchange substances more readily than large cells?
why can small cells exchange substances more readily than large cells?
What does a cell use to expend energy to transport substances?
Generally, cells derive their energy from ATP (in their phosphate bond).
What help maintain homeostasis in cells does not require energy?
Simple diffusion and osmosis help maintain homeostasis in cells and do not require the cell to expend energy.
Does the facilitated diffusion not require the cell to use energy?
It does not require the use of the cells energy.
What are the substances needed for phototsynthesis?
plant cells-leafs and with the energy of sunshine.
When carbohydrates are not available where do cells get energy?
They convert other substances (such as fat in the instance of animal cells) into carbohydrates
Why is it an advantage to having dead cells on the surface of the body?
It can protect your body from harmful substances.
Describe methods by which substances enter and leave cells that require cellular energy?
Diffusion is the methods that leave cells. Diffusion also has to have cellular energy.
What breakdown of body cells or substances releasing energy and carbon dioxide?
cecum
What roles do cilia and flagella play on stationary cells?
They move substances along the surface of the cell.
Cells are limited in size by the?
a. rate at which substances needed by the cell can enter the cell through its surface.
Move substances along the surface of cells?
Flagella, pseudopodia. cilia
Why do you use osmosis?
Because osmosis is passive, which means it does not require energy. It allows the transfer of water to where its needed, without cells needing to expend any ATP.
