In-Text Figure Based Questions
-Which of the following would increase vascular resistance? increased vessel length, increased vessel luminaldiameter, turbulence. (Figure 21-7)
A) increased vessel length and increased vessel luminal diameter
B) increased vessel luminal diameter and turbulence
C) increased vessel luminal diameter
D) increased vessel length and turbulence
E) increased vessel length, increased luminal diameter, and turbulence

Question

Quizplus · Accepted Answer

Increased vessel length and turbulence increase vascular resistance. Longer vessels increase resistance due to the longer path blood must travel, causing more friction. Turbulence, often occurring in areas of high flow rates or irregular vessel structures, disrupts smooth blood flow, increasing resistance. Conversely, increased vessel luminal diameter decreases resistance, as described by Poiseuille's law, allowing for easier blood flow.