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Categorieën: Alle - diffusion - membrane - transport - water

door kaiqing chin 6 jaren geleden

150

MovementofSubstances_KQ

Cells rely on different mechanisms to move substances across their membranes, which can be broadly categorized into active and passive transport. Active transport requires energy to move particles against a concentration gradient, such as the uptake of glucose and amino acids in the small intestines and the absorption of mineral salts by root hair cells in plants.

Transport in Animals

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door Tung Wai Kiong Derek (Mr) N/A

Primary SIX science curriculum notes

door BRIAN LEE N/A

Eggs are a rich source of protein,which has many uses in food preparation.Prepare a nutritious and interesting one-dish meal with the use of eggs for a group of people

door Jin Yao

requires

Net movement

Water molecules

A partially permeable membrane

A water potential gradient

With/without a membrane

A concentration gradient

affected by

like

examples

both cells have

animal cell becomes

plant cell becomes

consists 2 types

animal cell will

effects on

example

in

of

occurring

down

to

from

occurs

occurs through

involves

2 processes

involves processes like

Movement of Substances

Active Transport

Movement

Particles

Partially permeable membrane

Region of higher concentration

Region of lower concentration

Against a concentration gradient

Energy

Absorption of nutrients

Glucose and amino acids

Small intestines

Uptake of mineral salts

Root hair cells of plants

Passive Transport

No energy

Osmosis

Cells

Plant cells

Solution of higher water potential

Turgid

Burst/lyse

Animal cells

Solution of same water potential

No change

Cell size and shape

Solution of lower water potential

Plasmolysed and flaccid

Crenated

Diffusion

Rate of diffusion

Surface area to volume ratio

Concentration gradient

Temperature

Gaseous exchange

Oxygen and carbon dioxide

Lungs