TRANSPORT Flashcards

Topic 2 H

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1
Q

to function properly, organisms need to

A

exchange substances like food molecules and waste wit their environment

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2
Q

the exchange of substances happens through

A

via diffusion, osmosis, and active transport across the cell membrane

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3
Q

unicellular organisms have ___ surface areas compared to their volume , meaning the distance from surface to centre is___

A

large

small

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4
Q

why don’t unicellular organisms need specialised exchange surfaces or transport systems

A

because diffusion, osmosis, and active transport through the cell membrane are sufficient for their needs.

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5
Q

multicellular organisms have bodies composed of

A

many cells

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6
Q

the multicellular organisms have a ____ distance from surface to centre so diffusion _____ enough

A

large

not

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7
Q

why is diffusion not enough for multicellular organisms

A

would be too slow to meet the organism’s needs, so larger organisms require transport systems

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8
Q

what do multicellular organisms have to help with diffusion

A

transport systems

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9
Q

what is the transport system in animals

A

circulatory system

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10
Q

what is the transport system in plants

A

the vascular system

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11
Q

the xylem transports

A

water and minerals from roots to shoots

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12
Q

phloem transports

A

amino acids and sugars throughout the plant

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