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

Arteries are best defined as the vessels which 

1. carry blood away from the heart to different organs

2. break up into capillaries which reunite to form a vein

3. carry blood from one visceral organ to another visceral organ

4. supply oxygenated blood to the different organs

Which one of the following statements is correct regarding blood pressure?

1. 100/55 mmHg is considered an ideal blood pressure

2. 105/50 mmHg makes one very active

3. 190/110 mmHg may harm vital organs like brain and kidney

4. 130/90 mmHg is considered high and requires treatment

A person with unknown blood group under ABO system, has suffered much blood loss in an accident and needs immediate blood transfusion. His one friend who has a valid cetificate of his own blood type, offers for blood donation without delay. What would have been the type of blood group of the donor friend?

(1) Type AB

(2) Type O

(3) Type A

(4) Type B