Written by the Fiveable Content Team โข Last updated September 2025
Verified for the 2026 exam
Verified for the 2026 examโขWritten by the Fiveable Content Team โข Last updated September 2025
Definition
Ions are electrically charged particles found in the body that play a crucial role in various physiological processes. They can be either positively charged (cations) or negatively charged (anions).
Related terms
Electrolyte: Electrolytes are ions that help maintain proper fluid balance and electrical activity in the body.
Ion Channel: An ion channel is a protein pore in the cell membrane that allows specific ions to pass through, regulating their movement.
Ion Pump: An ion pump is a protein transporter that actively moves ions across the cell membrane against their concentration gradient.