10 Questions
What is the term used to describe the environment around the cells of multicellular organisms?
Tissue fluid
Why is diffusion alone not sufficient to supply or remove materials to cells that are far from exchange surfaces?
Cells are too far for diffusion to be effective in supplying or removing materials to and from their tissue fluid.
How does the size and metabolic rate of an organism affect the amount of materials exchanged?
Organisms with high metabolic rates exchange more materials and require a larger surface area to volume ratio.
What is responsible for maintaining the diffusion gradients that bring materials to and from the cell-surface membranes?
Mass transport system
How do organisms adapt their exchange surfaces and transport systems based on their needs?
Organisms evolve exchange surfaces and transport systems that meet their specific requirements.
Explain the importance of the exchange surfaces in the context of material transfer between environments.
Exchange surfaces facilitate the transfer of materials between the external and internal environments of organisms.
What happens to waste products once they are absorbed into the organism?
Waste products are returned to the exchange surface for removal.
Why do organisms with a high metabolic rate require a larger surface area to volume ratio?
High metabolic rate organisms need more materials exchanged, hence requiring a larger surface area to volume ratio.
How do materials reach the tissue fluid surrounding cells in multicellular organisms?
Materials are rapidly distributed to the tissue fluid once absorbed.
What role does the mass transport system play in the context of material exchange between environments?
The mass transport system maintains the diffusion gradients necessary for material exchange near cell-surface membranes.
Test your knowledge on cell membranes, exchange surfaces, and the transfer of materials between internal and external environments in organisms. Explore how cells receive and release substances through the cell plasma membranes and tissue fluid.
Make Your Own Quizzes and Flashcards
Convert your notes into interactive study material.
Get started for free
