Body Fluids and Circulation

The cardiac pacemaker in a patient fails to function normally. The doctors find that an artificial pacemaker is to be grafted in him. It is likely that it will be grafted at the site of

1. atrioventricular bundle
2. Purkinje system
3. sino-atrial node
4. atrioventricular node.

Bundle of His is a network of

1. muscle fibres distributed throughout the heart walls
2. muscle fibres found only in the ventricle wall
3. nerve fibres distributed in ventricles
4. nerve fibres found throughout the heart.

In the ABO system of blood groups, if both antigens are present but no antibody, the blood group of the individual would be

1. B
2. O
3. AB
4. A.

Impulse of heart beat originates from

1. SA node
2. AV node
3. vagus nerve
4. cardiac nerve

Which of the following statements is true for lymph?

1. WBC + serum
2. Blood - RBCs and some proteins
3. RBCs + WBCs + plasma
4. RBCs + proteins + platelets

Continuous bleeding from an injured part of body is due to deficiency of

1. vitamin A
2. vitamin B
3. vitamin K
4. vitamin E.

What is correct for blood group O?

1. No antigens but both a and b antibodies are present
2. A antigen and b antibody present
3. Antigen and antibody both absent
4. A and B antigens and a, b antibodies present

Difference between pulmonary artery and pulmonary vein is that, the pulmonary artery has

1. no endothelium
2. valves
3. thicker walls
4. oxygenated blood

In which point, pulmonary artery is different from pulmonary vein?

1. Its lumen is broad
2. Its wall is thick
3. It has valves
4. It does not possess endothelium

Which statement is true for WBC?

1. Non-nucleated
2. In deficiency, cancer is caused
3. Manufactured in thymus
4. Can squeeze through blood capillaries