Card 1 of 23
What does atrial contraction do just before ventricular contraction?
A
It tops up the ventricles with blood.
B
It empties the venae cavae into the atria.
C
It pumps blood into the arteries under high pressure.
D
It closes the semilunar valves to prevent backflow.
Card 1 of 23
Cardiac control, ECGs and exercise physiology Flashcards
23 flashcards on Edexcel A A Level Biology Cardiac control, ECGs and exercise physiology: the key terms, definitions and processes you need to recall for Paper 1, Paper 2 and Paper 3.