system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
If diameter of a vessel is increased double -
assistant
The correct answer is  Ans. is 'c' i.e., Blood flow increases sixteen-fold Poiseuille's Law (Hagen-Poiseille's law) o The Poiseuille's equation states that: -Where Q is the rate of flow. (Pl - P2) is the pressure difference across the vessel (provided P1 > P2), n is the viscocity of blood, r is the radius and L the length of the tubeo If everything else remains constant, blood flow is directly poroportional to 4th power of radiuso Thus, if the diameter (or radius) is increased to to double, blood flow will increase 16 times.