Osmosis, Active Transport and Diffusion

Question	Answer
What is Osmosis?	The movement of water.
What is Osmosis similar to?	Diffusion.
How would you describe the movement of water molecules in osmosis?	Random and require no energy from the cell.
How would you describe the membrane osmosis takes place across?	A partially permeable membrane.
Does the water travel from a higher water concentration to a lower water concentration or a lower water concentration to a higher water concentration?	Higher water concentration to a lower water concentration.
What is the cell membrane an example of?	A partially permeable membrane.
What is active transport?	The movement of substances against a concentration gradient and/or across a cell membrane, using energy.
Where does active transport get energy from?	Energy is released in respiration.
What can be re-absorbed in the kidney tubules by active transport?	Glucose.
What chemical is transported in the human body using active transport?	Oxygen.
What is the correct name for the part of the enzyme that binds with other molecules?	Active site.
What factor can be changed without altering the shape of the enzyme?	Concentration
What is diffusion?	The net movement of particles of a gas or a solute.
How does concentration affect diffusion?	Diffusion occurs more rapidly when there is a larger difference in concentration.
Describe one example of diffusion.	The diffusion of oxygen into the cells of the body from the bloodstream as the cells are respiring (and using up oxygen).

Resource summary

	Created by charlie:) over 11 years ago