MCQ Questions
Q.1.
Which of the following vasoactive substances causes vasodilation at low to normal concentration, but at high concentrations causes vasoconstriction on vascular smooth muscle?
  • 0%
    Arterioles
  • 0%
    Sympathetic nerves to lymphatic vessels
  • 0%
    Hemoglobin
  • 0%
    Potassium ions
Q.2.
The total cross-sectional area is greatest in which blood vessels?
  • 0%
    capillaries
  • 0%
    Hemoglobin
  • 0%
    veins; arteries
  • 0%
    Arterioles
Q.3.
Which of the following blood vessel types provides the greatest resistance to blood flow?
  • 0%
    Sympathetic nerves to lymphatic vessels
  • 0%
    Hemoglobin
  • 0%
    Arterioles
  • 0%
    Potassium ions
Q.4.
Which of the following statements best defines the term compliance?
  • 0%
    Blood velocity through capillaries is very fast.
  • 0%
    A measure of the relationship between pressure and volume changes
  • 0%
    Sympathetic nerves to lymphatic vessels
  • 0%
    Arterioles