A stroke is a medical emergency that occurs when blood flow to a part of the brain is interrupted or reduced, depriving brain tissue of oxygen and nutrients and causing brain cells to die within minutes. Immediate medical attention is crucial to minimize brain damage and potential complications, emphasizing the importance of recognizing symptoms like sudden numbness, confusion, trouble speaking, or loss of balance.
Signal transduction is the process by which a cell converts an extracellular signal into a functional response, involving a series of molecular events typically initiated by the binding of a signaling molecule to a receptor. This process is crucial for cells to respond to their environment, regulate cellular activities, and maintain homeostasis.