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What enter and leave cells?
it is the cellmembrain
How does gases enter and leave capillaries?
Simple diffusion.
Describe several ways in which gases enter and leave the atmosphere?
By air
The holes in a leaf where gases enter and leave?
Stomata (stoma)
How do gases enter and escape from leaves?
Gases enter and exit a leaf through stomata. These are openings in the epidermis which are regulated by guard cells. Guard cells decide which gases can go in and out. The gas that goes in is carbon dioxide and the gas that goes out it oxygen.
What is the process by which substances enter and leave cells and become distributed within cells?
Transport
What cell main job is to control which substances enter and leave a plant cell.?
?
What are the small openings on a leaf that allow gasses to leave and enter the plant'?
It is controlled by a combination of the pressures/concentration gradients of the gases involved, and the guard cells of the stomata.
What substances enter and leave the cells?
Proteins made on "bound" (attached) ribosomes leave through the cell membrane, and other proteins will enter the cell.
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 causes oxygen to enter and carbon dioxide to leave the capillaries?
Oxygen and carbon dioxide get into and out of cells via diffusion. The gases diffuse across the thin capillary wall, and then diffuse across the cell membrane.
Name gases e and f which enter and leave the lungs?
Oxygen (O2) and Carbon Dioxide (CO2) =)
