The Need for Specialised Gas Exchange Surfaces (OCR A-Level Biology A): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
What happens when oxygen supply cannot match demand during intense physical activity?
What happens when oxygen supply cannot match demand during intense physical activity?
Cells create an oxygen deficit
Which THREE properties must a surface have for effective diffusion-based gas exchange?
Which THREE properties must a surface have for effective diffusion-based gas exchange?
Permeable, moist, and thin
Why must gases be dissolved in solution to cross cell membranes?
Why must gases be dissolved in solution to cross cell membranes?
Gases can only cross membranes dissolved
How long does oxygen take to reach all cells in Paramecium (50 μm distance)?
How long does oxygen take to reach all cells in Paramecium (50 μm distance)?
Approximately 8 seconds
What THREE main problems arise as organisms increase in size?
What THREE main problems arise as organisms increase in size?
Diffusion distance, metabolic demand, cover
For a cube with side length L, what is the SA:V ratio formula?
For a cube with side length L, what is the SA:V ratio formula?
6/L
If linear dimensions double, by what factors do surface area and volume increase?
If linear dimensions double, by what factors do surface area and volume increase?
Surface area ×4, volume ×8
What happens to the SA:V ratio when organism size doubles?
What happens to the SA:V ratio when organism size doubles?
The ratio halves
Which term describes the biochemical process in cells that releases energy from glucose?
Which term describes the biochemical process in cells that releases energy from glucose?
Respiration
Why do waterproof body coverings present a problem for terrestrial organisms?
Why do waterproof body coverings present a problem for terrestrial organisms?
They're impermeable to oxygen and CO₂