KROK 1 2010 – Question 128 · KROK (Medicine) · Physiology
Introduction of a big dose of histamine to an experimental animal caused abrupt drop of arterial pressure as a result of:
- A. Constriction of resistance vessels
- B. Dilatation of resistance vessels
- C. Decrease of heart rate and force
- D. Decrease of heart rate
- E. Increase of heart rate
Hint
Arterial pressure depends on cardiac output and on peripheral vascular tone; ask which of these histamine alters most when it is given in a big dose.
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