Active Transport Definition Biology =link= -

| Example | Location | Function | |---------|----------|----------| | Sodium-Potassium pump | Animal cell membranes | Maintains resting potential & cell volume | | Proton pump | Plant & fungal cells, mitochondria | Creates proton gradient for ATP synthesis | | Calcium pump | Muscle cells | Removes Ca²⁺ to allow muscle relaxation | | Iodine uptake | Thyroid gland | Concentrates iodine for hormone production |

Understanding the active transport definition in biology is crucial for grasping how cells maintain homeostasis, transmit nerve impulses, and absorb nutrients. What is the Definition of Active Transport? active transport definition biology

is the energy-dependent movement of molecules or ions across a biological membrane against their concentration gradient — i.e., from an area of lower concentration to an area of higher concentration. transmit nerve impulses