Created by Gisele Teo
almost 6 years ago
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Question | Answer |
Chapter 10 Transport systems in organisms | lets gooo |
Define Diffusion | it is the net movement of particles from a region of higher concentration to a region of lower concentration until an equilibrium is reached. |
diffusion in humans ? | During absorption, soluble digested substances, diffuse into the bloodstream from the small intestine due to the presence of concentration of the nutrients between these 2 regions. |
diffusion in plants? | partially permeable cell membrane allows only some [such as minerals and nutrients] to diffuse but not others. |
define osmosis | it is the net movement of water molecules moving from a region of higher water potential to a region of lower water potential until an equilibrium is reached. |
osmosis in humans? | if a human cell has--- a higher water potential, the cell swells as it does not have a cell wall to protect it and eventually bursts. a lower water potential, the cell shrinks in size and becomes crenated. |
osmosis in plants? | if a plant cell has --- a higher water potential, cell expands and becomes turgid but the cell wall prevents it from bursting a lower water potential, cytoplasm shrinks away from the cell wall and it becomes plasmolysed. |
similarities and differences | similarities: both involve the movement of articles down their concentration gradient. differences: diffusion does not need a partially permeable membrane, osmosis needs. diffusion can occur for any particle but osmosis is only for water molecules. |
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