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Movement Into and Out of Cell
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A plant absorbs a number of substances into its roots. Which row of the table below correctly shows the substances absorbed by the roots and how these substances are absorbed?
A
A plant absorbs a number of substances into its roots. Which row of the table below correctly shows the substances absorbed by the roots and how these substances are absorbed?
A
Which of the following statements would be correct for both diffusion and osmosis?
C
What causes the diffusion of carbon dioxide out of a living cell?
Random movement of molecules (kinetic energy)
How does a water vapour molecule move out of the air space of a leaf into the atmosphere on a dry day?
Diffusion
What kind of condition in this picture? Explain your answer!
Diffusion
What condition about this picture? Explain your answer
Osmosis
What is plasmolyzed condition?
he process of contraction or shrinkage of the protoplasm of a plant cell and is caused due to the loss of water in the cell
What is turgid condition?
When water moves into a plant cell, the vacuole gets bigger, pushing the cell membrane against the cell wall.
Mention 3 factors that influence diffusion
Surface area to volume ratio, Concentration Gradient, temperature
Gas exchange occurs at the alveoli. Describe how oxygen molecules move from the alveoli into the blood.
diffusion, across (cell / permeable) membranes, high concentration to low concentration (of O2 )
Mention 2 examples of active transport
uptake of glucose by epithelial cells in the villi of the small intestine, uptake of ions from soil water by root hair cells in plants
Give 2 examples of osmosis
The absorption of water from the soil, Potato In Sugar Solution
Give 2 examples in diffusion in our daily life
spraying a perfume, making a tea, dissolve the sugar in the water
Describe the ways in which diffusion is different to active transport
look the table
State the name of the process by which water molecules move into plant roots
osmosis
The diagram shows a palisade mesophyll cell and the same palisade mesophyll cell after it has been placed in a concentrated sugar solution for twenty minutes. Explain why the cell in the second diagram changed
water moves out of the cell, osmosis, sugar solution more concentrated than cell contents
Some substances move into cells by the process of diffusion. State the name of the outer part of an animal cell that substances move through during diffusion.
Cell membrane
A plant was not watered for one week. Look at a series of photographs of the plant during the week. Explain how the lack of water has affected the support of the leaves of the plant shown in the photographs. Use the term turgor pressure
lack of turgor pressure, (mesophyll) cells not providing support / cell collapses, (lack of water means cells become) plasmolyse ;
Water is an essential molecule for life. Complete the statements. Water moves into and out of cells by ........................ Water is known as a ................... because it can dissolves a solute, resulting in a solution
Osmosis and Solvent


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