Which of the following increases turbulence in blood flow?
**Core Concept**
The question tests the understanding of **hemodynamics**, specifically the factors influencing blood flow characteristics. Turbulence in blood flow is affected by the physical properties of blood and the vascular system.
**Why the Correct Answer is Right**
Increased turbulence is associated with factors that disrupt the smooth, **laminar flow** of blood. One key factor is the **Reynolds number**, which takes into account blood velocity, vessel diameter, and blood viscosity.
**Why Each Wrong Option is Incorrect**
**Option A:** Incorrect because it doesn't directly relate to turbulence.
**Option B:** Incorrect as it's not a factor that increases turbulence.
**Option C:** Incorrect because it's not the correct choice based on standard turbulence factors.
**Clinical Pearl / High-Yield Fact**
A key point to remember is that **turbulence** can lead to increased **shear stress** on the vascular wall, potentially contributing to **atherosclerosis**.
**Correct Answer:** D. Bifurcation of blood vessels.