Flashcards
Osmosis, Active Transport and Diffusion
Flashcards do conjunto (15)
- 1What is Osmosis?The movement of water.
- 2What is Osmosis similar to?Diffusion.
- 3How would you describe the movement of water molecules in osmosis?Random and require no energy from the cell.
- 4How would you describe the membrane osmosis takes place across?A partially permeable membrane.
- 5Does 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.
- 6What is the cell membrane an example of?A partially permeable membrane.
- 7What is active transport?The movement of substances against a concentration gradient and/or across a cell membrane, using energy.
- 8Where does active transport get energy from?Energy is released in respiration.
- 9What can be re-absorbed in the kidney tubules by active transport?Glucose.
- 10What chemical is transported in the human body using active transport?Oxygen.
- 11What is the correct name for the part of the enzyme that binds with other molecules?Active site.
- 12What factor can be changed without altering the shape of the enzyme?Concentration
- 13What is diffusion?The net movement of particles of a gas or a solute.
- 14How does concentration affect diffusion?Diffusion occurs more rapidly when there is a larger difference in concentration.
- 15Describe 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).
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- Biology FlashCards sobre Osmosis, Active Transport and Diffusion, criado por charlie:) em 08-05-2013.
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