In mammals, which blood vessel would normally carry largest amount of urea?

(1) Dorsal Aorta             

(2) Hepatic Vein

(3) Hepatic Portal vein     

(4) Renal vein

Blood pressure in the pulmonary artery is

(1) more than that in the carotid

(2) more than that in the pulmonary vein

(3) less than that in the venae cavae

(4) same as that in the aorta

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

1. Frog

2. Lizard

3. Whale

4. Shark

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

Erythropoiesis starts in:-

1. kidney

2. liver

3. spleen

4. red bone marrow

Blood pressure in the mammalian aorta is maximum during

1. systole of the left atrium

2. diastole of the right ventricle

3. systole ot the left ventricle

4. diastole of the right atrium

Which one of the following is correct?

1. Plasma = Blood - Lymphocytes

2. Serum = Blood + Fibrinogen

3. Lymph = Plasma + RBC + WBC

4. Blood = Plasma + RBC + WBC + Platelets

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.

How do parasympathetic neural signals affect the working of the heart?

1. Reduce both heart rate and cardiac output

2. heart rate is increased without affecting the cardiac output

3. Both heart rate and cardiac output increase

4. Heart rate decreases but cardiac output increases

The diagram given here is the standard ECG of a normal person. the P-wave represents

the

1. contraction of both the atria

2. initiation of the ventricular contraction

3. beginning of the systole

4. end of systole