« on: 13/08/2022 11:17:36 »
Quote from: JanetSims
Does (hyponatremia) have any danger to health?Your body carefully regulates the levels of salts in your body, as a severe imbalance can cause death:
- Nerves use sodium and potassium ions to transmit nerve impulses. Mental confusion can result from an imbalance.
- Muscles use sodium and potassium ions to coordinate contraction. Cramps can result from an imbalance
- The salt levels affect osmotic pressure, which is important in all cells
- Brain swelling can result from an imbalance, producing possible brain damage
- Hyponatremia often affects amateur long-distance runners
The "ideal" level of salt inside our cells is quite different from the levels outside our cells (eg in the blood & lymphatic fluid).
- It is much higher than in fresh water,
- and much lower osmotic pressure than in the sea today (except for sponges & jellyfish).
- Some have suggested that the level of salt is indicative of salt levels in the sea when the first cells were formed.
- Marine creatures have to do work to keep the salt levels at the correct level, despite higher salt concentrations in the surrounding sea water.
- Freshwater creatures have to do work to keep the salt levels at the correct level, despite lower salt concentrations in the surrounding sea water.