Question at position 45 Which of the following factors can contribute to turbulence in blood flow?Decreased blood velocityIncreased arterial complianceHigh blood viscosityAbrupt changes in vessel geometry

Question

BlackTom AI · Accepted Answer

Exploring the statement about what can contribute to turbulence in blood flow involves evaluating how different physiological factors affect flow patterns.
Option 1: Decreased blood velocity. While lowering velocity can reduce inertial forces and make laminar flow more likely, turbulence is not typically driven by slower flow; in fact, high speeds and abrupt changes are more common culprits for generating turbulence. So this choice does not predominantly explain turbulence.
Option 2: Increased arterial compliance. Greater elasticity of the vessel wall tends to cushion flow and can promote smoother, more compliant movement of blood, which generally supports laminar, not turbulent, flow. Therefore this factor is not a primary promoter of turbulence.
Option 3: High blood viscosity. Greater viscosity dampens flow instabilities by increasing the resistance to shear and smoothing velocity gradients, often reducing the tendency toward turbulence. Consequently, high viscosity is not a typical driver of turbulent flow.
Option 4: Abrupt changes in vessel geometry. Sudden diameter transitions, bifurcations, or sharp bends disrupt the smooth velocity profile, generating eddies and chaotic flow patterns characteristic of turbulence. This mechanical disruption is a well-known cause of turbulent flow in vessels.
In summary, among the given options, abrupt changes in vessel geometry are the most plausible factor contributing to turbulence, whereas the other factors generally act to stabilize or dampen flow and reduce turbulence likelihood.

Question at position 45 Which of the following factors can contribute to turbulence in blood flow?Decreased blood velocityIncreased arterial complianceHigh blood viscosityAbrupt changes in vessel geometry单项选择题

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