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
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10
What condition about this picture? Explain your answer
Osmosis
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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 )
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10
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 ;
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10
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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thief
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seesaw
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gift
Win 15 points!
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thief
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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
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Give 2 examples in diffusion in our daily life
spraying a perfume, making a tea, dissolve the sugar in the water
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baam
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shark
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rocket
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baam
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State the name of the process by which water molecules move into plant roots
osmosis
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monster
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gold
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shark
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banana
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10
How does a water vapour molecule move out of the air space of a leaf into the atmosphere on a dry day?
Diffusion
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Describe the ways in which diffusion is different to active transport
look the table
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Give 2 examples of osmosis
The absorption of water from the soil, Potato In Sugar Solution
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What is turgid condition?
When water moves into a plant cell, the vacuole gets bigger, pushing the cell membrane against the cell wall.
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Mention 2 examples of active transport
uptake of glucoseย by epithelial cells in the villi of the small intestine, uptake of ionsย from soil water by root hair cells in plants