Paper 1, May June 2008 | Cambridge AS - A Level Biology (9700) Past Papers
Cambridge
AS & A Level
Biology (9700)
شهریور
2008
مشاهده نمونه سوال
شامل مباحث:
AS Level
تعداد سوالات: 40
سطح دشواری:
متوسط
شروع:
آزاد
پایان:
آزاد
مدت پاسخگویی:
60 دقیقه
پیش نمایش صفحه اول فایل
Neda Bani The statements list some of the events in the cardiac cycle. They are not in the correct order.
Which statement describes the fifth of these events to occur in the cardiac cycle?
1) The impulse travels through Purkyne tissue.
2) A wave of excitation sweeps across the atria.
3) The atrioventricular node delays the impulse for a fraction of a second.
4) The sinoatrial node contracts.
5) The wave of excitation…
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