BSC1010L Diffusion

BSC1010L Diffusion What is the solvent in biological solutions such as cytoplasm and blood? - Answerwater Diffusion takes place in: - Answer- a solution A solution is created when: - Answer- two substances are mixed and one is dissolved in the other True or false. Fat is not soluble in water. - Answer- True In a solution, the substance which there is most of is: - Answer- solvent (ex. water) The other substances in the solution are called: - Answer- solutes Solute and solvent combine to form a: - Answer- solution What does concentration tell you? - Answer- it tells how much solute there is in a solution. (ex. tea with 2 tbsp of sugar is more concentrated than one with 1 tbsp. ) Higher concentration: - Answer- more solute Lower concentration: - Answer- less solute What takes place when a solute concentration is unequal within a solution? - AnswerDiffusion When the solute concentration is unequal, we say that a _____ exists. - Answerconcentration gradient True or false. Diffusion takes place ONLY when there is a concentration gradient. - Answer- true What drives diffusion? - Answer- random movement (happens all the time) Molecules move: - Answer- randomly and at high speed Diffusion - Answer- process by which molecules intermingle as a result of their kinetic energy of random motion Diffusion: - Answer- net movement of molecules from a region of high concentration to one of lower concentration. (HIGH ---- LOW) Diffusion in semi-solids, liquids, and gases occurs in: - Answer- the same way; individual molecules move around in random manner so groups of molecules tend to spread out as much as possible. In gas: - Answer- solvent molecules are widely spaced so the solute moves faster and more freely Faster movement= - Answer- faster diffusion Lower density of molecules = - Answer- faster diffusion, all things equal