B1.10 Flashcards
(10 cards)
What is surface area to volume ratio?
The ratio of the surface area of an object to its volume.
How does surface area to volume ratio change as an object gets bigger?
It decreases as the object gets bigger.
Why is surface area to volume ratio important for exchanging materials?
A high surface area to volume ratio allows for more efficient exchange of materials.
How do single-celled organisms exchange materials?
Through simple diffusion across their cell membrane.
Why do large multicellular organisms need specialized systems for exchanging materials?
They have a low surface area to volume ratio, making simple diffusion inefficient.
How do adaptations like a large surface area and a thin membrane help with exchanging materials?
They increase the area for exchange and reduce the distance materials need to travel.
How does having a good blood supply help with exchanging materials?
It maintains a concentration gradient and removes materials from the exchange surface.
What are some examples of adaptations that help with exchanging materials in animals?
Examples include gills in fish, alveoli in lungs, and root hairs in plants.
How do plants adapt their leaves for efficient exchange of materials?
They have a large surface area, thin leaves, and stomata to allow for efficient gas exchange.
What are some key points about exchanging materials?
Key points include the importance of surface area to volume ratio, adaptations for efficient exchange, and the role of blood supply and ventilation.
