- Study guides, Class notes & Summaries

Why do multicellular organisms need specialised exchange surfaces but single celled organisms don't? - ANSWER single celled organisms can exchange materials across their CSM to meet requirements - metabolic activity low → O2 needs low + CO2 produced is low - large SA:V ratio Multicellular organisms are the opposite - high metabolic rate (active + maintain temp) - small SA:V ratio 3 main features of an efficient exchange surface - ANSWER • increased surface area • thin layer • ...

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24 pages

Written in 2023/2024

Grade A+

contenthive76

EXCHANGE SURFACES VERIFIED SOLUTIONS 2023/2024 Why do multicellular organisms need specialised exchange surfaces but single celled organisms don't? - ANSWER single celled organisms can exchange materials across their CSM to meet requirements - metabolic activity low → O2 needs low + CO2 produced is low - large SA:V ratio Multicellular organisms are the opposite - high metabolic rate (active + maintain temp) - small SA:V ratio 3 main features of an efficient exchange surface - ...

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24 pages

Written in 2023/2024

Grade A+

STUDENTSCORE

EXCHANGE SURFACES Test Exam Questions And Answers Verified 100% Correct What is at the end of the tracheoles in insects? - ANSWER tracheal fluid oxygen diffuses faster in air than it does in water so tracheal fluid is a barrier to oxygen diffusion when insect is active more SA of muscle is exposed so more O2 can diffuse structure of gills - ANSWER gills composed of thousands of filaments. each filament is covered in lamallae lamallae are thin so dif...

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24 pages

Written in 2024/2025

Grade A+

TopGradeGuru

EXCHANGE SURFACES VERIFIED SOLUTIONS 2023/2024 Why do multicellular organisms need specialised exchange surfaces but single celled organisms don't? - ANSWER single celled organisms can exchange materials across their CSM to meet requirements - metabolic activity low → O2 needs low + CO2 produced is low - large SA:V ratio Multicellular organisms are the opposite - high metabolic rate (active + maintain temp) - small SA:V ratio 3 main features of an efficient exchange surface - ...

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24 pages

Written in 2023/2024

Grade A+

brilliantstudies

EXCHANGE SURFACES VERIFIED SOLUTIONS 2023/2024 Why do multicellular organisms need specialised exchange surfaces but single celled organisms don't? - ANSWER single celled organisms can exchange materials across their CSM to meet requirements - metabolic activity low → O2 needs low + CO2 produced is low - large SA:V ratio Multicellular organisms are the opposite - high metabolic rate (active + maintain temp) - small SA:V ratio 3 main features of an efficient exchange surface - ...

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24 pages

Written in 2022/2023

Grade A+

EWLindy