During a cardiac cycle:
1. About 70 ml of blood is pumped by the two ventricles
2. The left atrium and the left ventricle contract simultaneously
3. More blood is pumped into the systemic than in pulmonary circulation
4. The atria contract prior to the ventricles

Erythroblastosis fetalis can be prevented during a second pregnancy in a Rh negative mother who is likely to carry a Rh positive fetus by:

Which of the following have no nuclei and originate as pinched-off cytoplasmic fragments of large cells in the bone marrow?
1. Mature RBC
2. Reticulocytes
3. Thrombocytes
4. Macrophages

Amongst the following, a molecule that would lead to coagulation of the blood would be:
1. prostacyclin
2. tissue factor or thromboplastin
3. plasmin
4. tissue plasminogen activator

The normal pacemaker of the human heart, sinoatrial node, is derived from the more primitive:
1. ventricle

2. bundle of His

3. conus arteriosus

4. sinus venosus

Aging RBCs are phagocytized by macrophages in the mononuclear phagocyte system [sleen or liver] and their components are recycled, EXCEPT for the

1. iron atom from the heme group, which is excreted in bile

2. globin peptide chains, which are sent to the kidneys for excretion

3. globin peptide chains, which are converted into bilirubin

4. heme group (minus the iron atom), which is converted into a green pigment called biliverdin

Erythroblastosis fetalis condition arises when a:

1. Rh (+) female carries a Rh(–) foetus for the
first time.

2. Rh (+) female carries a Rh(–) foetus for the
second time.

3. Rh (–) female carries a Rh (+) foetus for the
first time.

4. Rh (–) female carries a Rh (+) foetus for the
second time.

Which of the following statements is not correct about
ECG?

1. P wave represents atrial depolarisation.

2. QRS wave initiates ventricular contraction.

3. The end of T wave marks the end of ventricular
systole.

4. Q wave marks the beginning of atrial systole.

Assertion: Right atrium and right ventricle of heart are known as pulmonary heart.

Reason: Both right atrium and ventricle pump the deoxygenated blood.

What would be the heart rate of a person if the cardiac output is 5L, blood volume in the ventricles at the end of diastole is 100 mL and at the end of ventricular systole is 50 mL?

1. 125 beats per minute

2. 50 beats per minute

3. 75 beats per minute

4. 100 beats per minute