Biology Objective #15

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Small molecules

What size molecules move by diffusion?

High, Low, With

In diffusion, molecules move from _____ concentration to _____ concentration. This movement is _____ the concentration gradient.

Water Molecules

What kind of molecules move by osmosis?

High, Low, Selectively Permeable, With

In osmosis, the water molecules move from _____ concentration to _____ concentration through a _____ membrane. This movement is _____ the concentration gradient.

Osmosis is the diffusion of water

How are diffusion and osmosis different?

Through diffusion

How does oxygen enter the cells of living organisms?

Through diffusion

How does carbon dioxide leave the cells of living organisms?

No

Do cells use energy to perform osmosis or diffusion?

Passive transport

What term is used o describe the movement of molecules without using energy?

Avtive transport

What term is used to describe the movement of molecules using energy?

Against

Does active trasport move molecules with or against the concentration gradient?

Hypotonic

What kind of solution has a higher water concentration than inside the cell?

Hypertonic

What kind of solution has a lower water concentration than inside the cell?

Isotonic

What kind of solution has a concentration of water equal to that inside the cell?

Isotonic

What kind of solution will not cause damge to cells because no osmosis occurs?

Hypotonic

What kind of solution will cause an increase in turgor pressure in a plan?

Hypertonic

What kind of solution will cause a plant to wilt?

Water moved out of the egg

What happened to the egg that was placed in the syrup?

In the egg

Was the concentration of water higher in the egg or in the syrup?

Hypertonic

What type of solution was the syrup?

Water moved into the egg

What happened to the egg that was placed in pure water?

In the water

Was the concentration of water higher in the egg or in the water?

Hypotonic

What type of solution was the pure water?

Yes, Active Transport

In a nerve cell, sodium ions move across the plasma membrane from an area of lower concentration to an area of higher concentration. Does the nerve cell use energy to do this? What type of transport is taking place?

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