In humans, blood passes from the post caval to the diastolic right atrium of heart due to:

1. pushing open of the venous valves

2. suction pull

3. stimulation of the sino auricular node

4. pressure difference between the caval and atrium

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

1. Serum albumins

2. Serum globulins

3. Fibrinogen in the plasma

4. Haemocytes

A drop of each of the following is placed separately on four slides. Which of them will not coagulate?
 

Rh-factor can produce disease:

1. AIDS

2. Turner's syndrome

3. Erythroblastosis foetalis

4. Sickle cell anaemia

If due to some injury the chordae tendineae of the tricuspid valve of the human heart is partially non-functional, what will be the immediate effect?

1. The flow of blood into the aorta will be slowed down

2. The 'pace maker' will stop working

3. The blood will tend to flow back into the left atrium

4. The flow of blood into the pulmonary artery will be reduced

Sympathetic nervous system induces:

1. heartbeat

2. secretion of digestive juice

3. secretion of saliva

4. All of the above

The blood group with antibody-a and antibody-b is:

1. B

2. A

3. O

4. AB

Rate of heartbeat is determined by:

1. Purkinje fibres

2. papillary muscles

3. SA-node

4. AV-node

Match the Column I and Column II:

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