Transport in Mammals (1) Biology AS & A Level
CIE
AS & A Level
Biology (9700)
فروردین
2010
شامل مباحث:
UNIT 8: Transport in mammals
تعداد سوالات: 20
سطح دشواری:
متوسط
شروع:
آزاد
پایان:
آزاد
مدت پاسخگویی:
25 دقیقه
پیش نمایش صفحه اول فایل
omer uner The diagram shows pressure changes in the left side of the heart and aorta over time. The length of this cardiac cycle is 0.6 s. Points 1, 2, 3 and 4 indicate when atrioventricular valves and semilunar valves either open or close.
What is the total time during one cardiac cycle that the atrioventricular valves and the semilunar valves are both closed at the same time?
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