Osmoregulatory

Definition

An osmoregulatory organism maintains a stable internal water and solute concentration despite external changes. This process is crucial for cellular function and overall homeostasis.

5 Must Know Facts For Your Next Test

1. Osmoregulation involves mechanisms like active transport, passive diffusion, and selective permeability of cell membranes.
2. Kidneys play a central role in osmoregulation by filtering blood and excreting waste while retaining necessary substances.
3. Marine fish are typically hypoosmotic regulators, actively expelling salts to manage their internal environment.
4. Freshwater organisms are generally hyperosmotic regulators, constantly absorbing salts from their dilute surroundings.
5. Hormones such as antidiuretic hormone (ADH) and aldosterone are critical in regulating osmotic balance.

Related terms

Homeostasis:

The maintenance of stable internal conditions in an organism.

Osmosis: The passive movement of water across a semipermeable membrane from low to high solute concentration.

Excretion:

The process of eliminating waste products from the body, often involving osmoregulatory organs like kidneys.