There is a possibility of exposure of the maternal blood [of Rh -ve mother] to small amounts of Rh +ve blood from the fetus during the:

1. First trimester of any pregnancy

2. Third trimester of the second pregnancy only

3. Delivery of the child

4. There is no such possibility

Congestion of the lungs is one of the main symptoms in:

1.  Hypotension

2.  Coronary artery disease

3.  Angina

4.  Heart failure

The right atria of the human heart receive:
1. Oxygenated blood
2. Deoxygenated blood
3. Arterial blood
4. Venous blood

The following is the diagrammatic representation of standard ECG. Identify the correct statement :

In the given section of the human heart which part ensures that atria contact prior to the ventricles ?

1. A

2. B

3. C

4. D

The hepatic portal vein drains blood to liver from 
(1) heart

(2) stomach

(3) kidneys

(4) intestine

Name the blood cells, whose reduction in number can cause clotting disorder, leading to excessive loss of blood from the body.

(1) Erythrocytes                       

(2) Leucocytes

(3) Neutrophils                         

(4) Thrombocytes

Serum differs from blood in 

(1) lacking globulins

(2) lacking albumins

(3) lacking clotting factors

(4) lacking antibodies

Doctors use a stethoscope to hear the sounds produced during each cardiac cycle. The

second sound is heard when

1. AV valves open up

2. Ventricular walls vibrate due to gushing in of blood from atria

3. Semilunar valves close down after the blood flows into vessels from ventricles

4. AV node receives the signal from SA node

Person with blood group AB is considered as universal recipient because he has

1. Both A and B antigens on RBC but no antibodies in the plasma

2. Both A and B antibodies in the plasma

3. No antigen on RBC and antibody in the plasma

4. Both A and B antigens in the plasma but no antibodies.