Diffusion in Multicellular Organisms (OCR GCSE Biology A (Gateway Science Suite)): Quizzes
📚Quizzes
Practise the questions
12 questions from this quiz
ShowHide
Practise the questions
12 questions from this quiz
Why is diffusion alone often not enough for multicellular organisms?
Why is diffusion alone often not enough for multicellular organisms?
Distance & complexity make it slow
What happens to surface area to volume ratio as organisms grow larger?
What happens to surface area to volume ratio as organisms grow larger?
Volume increases faster than surface area
Which specialised structures enhance diffusion in multicellular organisms?
Which specialised structures enhance diffusion in multicellular organisms?
Lungs, gills & intestines
How do alveoli in the lungs enhance diffusion?
How do alveoli in the lungs enhance diffusion?
Provide large surface area
Why are thin membranes important for diffusion?
Why are thin membranes important for diffusion?
Reduce distance & speed up process
What is the function of rich blood supply near exchange surfaces?
What is the function of rich blood supply near exchange surfaces?
Transport substances quickly
How does breathing help maintain diffusion in the lungs?
How does breathing help maintain diffusion in the lungs?
Maintains concentration gradients
In lung gas exchange, where does oxygen diffuse to?
In lung gas exchange, where does oxygen diffuse to?
From alveoli into blood
What structures increase surface area in the small intestine?
What structures increase surface area in the small intestine?
Villi & microvilli
Which waste product is removed from blood by kidneys through diffusion?
Which waste product is removed from blood by kidneys through diffusion?
Urea
What does the blood circulatory system transport?
What does the blood circulatory system transport?
Oxygen, nutrients & waste products
Which processes rely on diffusion as a fundamental mechanism?
Which processes rely on diffusion as a fundamental mechanism?
Respiration, nutrient uptake & waste removal