Adaptations to Salinity

A collection of flashcards covering the key concepts related to adaptations to salinity, diffusion, osmosis, and transport mechanisms in marine organisms.

What is diffusion in the context of molecular movement?

The tendency of molecules to move from an area of high concentration to an area of lower concentration, requiring no excess energy.

What is osmosis?

The diffusion of water through a semi-permeable membrane that allows only certain substances to move in and out of a cell.

What challenges do marine organisms face due to differing salt concentrations?

Marine organisms typically have a low concentration of salt compared to ocean water, leading to water movement that can be problematic.

How do sharks and rays adapt to their saline environment?

They maintain a high level of solute in their blood compared to the ocean.

What is the primary difference between diffusion and active transport?

Diffusion requires no energy and moves particles down a concentration gradient, whereas active transport requires energy and can move particles against a concentration gradient.

What do marine fish, birds, and reptiles use to manage excess salt?

They have salt glands that pump out excess salt.

How do marine mammals efficiently handle salt?

They possess efficient kidneys that filter out salt.