AS biology questionsWatch
i) a baby born with a hole in the wall between the right and left chambers of th eheart (hole in the heart) [2marks]
ii) valves (atrioventricular and semilunar) not working properly [2marks]
and if a patient suffers fibrillation, whatis the likely effect on the patient [1mark]
(ii) Circulation would be reduced because of back flow of blood.
(iiii) If blood isn't pumped completely out of the heart, it may pool and clot. If a piece of a blood clot in the atria leaves the heart and becomes lodged in an artery in the brain, a stroke results.