MDCAT Biology MCQ #2124

In a capillary bed, what is the primary factor controlling blood flow?

MDCAT Biology MCQ #2124

  1. Question 1

    Q1. In a capillary bed, what is the primary factor controlling blood flow?

    • A) Precapillary sphincter tone
    • B) Arteriolar diameter
    • C) Venous pressure
    • D) Cardiac output

    Answer: Precapillary sphincter tone

    Explanation: Precapillary sphincters regulate blood flow into capillary beds. Arteriolar diameter affects overall resistance.