NEET UG 2015 — Body Fluids and Circulation

Doctors use a stethoscope to hear the sounds produced during each cardiac cycle. The second sound is heard when:

Which one of the following is correct?

If you suspect major deficiency of antibodies in a person, to which of the following would you like for confirmation evidence?

Blood pressure in the mammalian aorta is maximum during

Which one of the following animals has two separate circulatory pathways?