substances that pass into and out of cells by diffusion save the cell a great deal of energy. when you consider how vitally important water, glucose, and (1 ) are to cells, you can understand just how necessary these passive transport processes really are. glucose and oxygen continually move into the cells (where they are in lower concentration because the cells keep using them up), and carbon dioxide (a waste product of cellular activity) continually moves out of the ( 2 ) into the blood (where it is in lower concentration). filtration. filtration is the process by which water and solutes are forced through a membrane (or capillary wall) by fluid, or hydrostatic, pressure. in the body, hydrostatic pressure is usually exerted by the blood. like diffusion, ( 3 ) is a passive process, and a gradient is involved. in filtration, however, the gradient is a pressure gradient that actually pushes solute - containing fluid (filtrate) from the higher - pressure area through the filter to the lower - pressure area. in the kidneys, water and small solutes filter out of the capillaries into the ( 4 ) tubules because the blood pressure in the capillaries is greater than the fluid pressure in the tubules. part of the filtrate formed in this way eventually becomes urine. filtration is not very selective. for the most part, only blood cells and ( 5 ) molecules too large to pass through the membrane pores are held back.

1 kidney 2 protein 3 oxygen 4 cells 5 filtration

1 protein 2 oxygen 3 cells 4 filtration 5 kidney

1 oxygen 2 cells 3 filtration 4 kidney 5 protein

1 filtration 2 kidney 3 protein 4 oxygen 5 cells

1 cells 2 filtration 3 kidney 4 protein 5 oxygen

Question

substances that pass into and out of cells by diffusion save the cell a great deal of energy. when you consider how vitally important water, glucose, and (1 ) are to cells, you can understand just how necessary these passive transport processes really are. glucose and oxygen continually move into the cells (where they are in lower concentration because the cells keep using them up), and carbon dioxide (a waste product of cellular activity) continually moves out of the ( 2 ) into the blood (where it is in lower concentration). filtration. filtration is the process by which water and solutes are forced through a membrane (or capillary wall) by fluid, or hydrostatic, pressure. in the body, hydrostatic pressure is usually exerted by the blood. like diffusion, ( 3 ) is a passive process, and a gradient is involved. in filtration, however, the gradient is a pressure gradient that actually pushes solute - containing fluid (filtrate) from the higher - pressure area through the filter to the lower - pressure area. in the kidneys, water and small solutes filter out of the capillaries into the ( 4 ) tubules because the blood pressure in the capillaries is greater than the fluid pressure in the tubules. part of the filtrate formed in this way eventually becomes urine. filtration is not very selective. for the most part, only blood cells and ( 5 ) molecules too large to pass through the membrane pores are held back.

1 kidney 2 protein 3 oxygen 4 cells 5 filtration

1 protein 2 oxygen 3 cells 4 filtration 5 kidney

1 oxygen 2 cells 3 filtration 4 kidney 5 protein

1 filtration 2 kidney 3 protein 4 oxygen 5 cells

1 cells 2 filtration 3 kidney 4 protein 5 oxygen

1 kidney 2 protein 3 oxygen 4 cells 5 filtration

1 protein 2 oxygen 3 cells 4 filtration 5 kidney

1 oxygen 2 cells 3 filtration 4 kidney 5 protein

1 filtration 2 kidney 3 protein 4 oxygen 5 cells

1 cells 2 filtration 3 kidney 4 protein 5 oxygen

Accepted Answer

# Brief Explanations:
1. Oxygen is vital for cells along with water and glucose.
2. Carbon - dioxide moves out of cells into the blood.
3. Filtration is a passive process like diffusion.
4. In kidneys, water and small solutes filter into the kidney tubules.
5. Large molecules like proteins are held back in filtration.
# Answer:
1. oxygen 2. cells 3. filtration 4. kidney 5. protein

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