Is osmoregulation active or passive?

Osmoregulation involves actively controlling osmotic pressure to ensure a balance of water and electrolytes within an organism. Active transport mechanisms in specialized cells, such as ion pumps and ion channels, regulate the movement of electrolytes across cell membranes. It is important to note that organisms use two main strategies for osmoregulation: conforming and regulating. Regulators actively control their internal osmotic pressure (by drinking) to maintain it within a tightly regulated range, regardless of external conditions. Many animals, including vertebrates like humans, are osmoregulators. Conformers adjust their internal osmolarity to match that of their external environment. They may use active or passive processes to achieve this, ensuring that their internal osmotic pressure closely resembles that of the surrounding water. This strategy is common in marine invertebrates, where the osmolarity inside their cells matches that of the seawater.