295013
Descripción
Mapa Mental por jadepalmer98, actualizado hace más de 1 año
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Creado por jadepalmer98
hace más de 10 años
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B3.1 - Movement of Molecules In and
Out of cells
- Diffusion
- Particles move from an area of high
concentration to low
Nota:
- For example, different gases can simply diffuse through one another. Alternatively, dissolved particles can diffuse in and out of cells through cell membranes.
- The structure of leaves let gases diffuse in and out of cells
- Diffusion through cell membranes
- Gas exchange happens in the lungs
- The villi provide a really really big
surface area
- Gas exchange happens in the lungs
- Particles move from an area of high
concentration to low
- Osmosis
- Similar to diffusion, but only refers to water
- Water moves across a partially permeable membrane (eg. cell membrane)
from an area of high water concentration to low
- Water moves across a partially permeable membrane (eg. cell membrane)
from an area of high water concentration to low
- Similar to diffusion, but only refers to water
- Active Transport
- Root hairs are specialised for
absorbing water and minerals
- Sometimes substances need to be
absorbed against a concentration gradient
- ie. from a lower to higher concentration
- Root hairs take in minerals
using active transport
- We need active transport to stop us starving
- Root hairs are specialised for
absorbing water and minerals
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