Transport in Mammals Quiz (4) Biology AS Level
Cambridge
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
What happens during ventricular systole in a mammalian heart?
1- The atrioventricular node transmits an electrical signal to the apex of the heart.
2- The pressure in the ventricles drops below the pressure in the atria.
3- The atrioventricular valves close and the semilunar valves open.