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Body Fluids and Circulation · Question 67

AIPMT 2003MCQMedium📈 Topic in 25% papers+4−1
1

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.

Answer

(2) muscle fibres found only in the ventricle wall

Solution

The conducting system of the heart (SAN, AVN, bundle of His, Purkinje fibres) is made of specialised cardiac (nodal) muscle fibres, not nerve fibres.

As per NCERT, a bundle of nodal fibres, the atrio-ventricular bundle (AV bundle), continues from the AVN, passes through the inter-ventricular septum, divides into right and left bundle branches, and these give rise to minute fibres throughout the ventricular musculature.

∴ The bundle of His is a network of muscle fibres found only in the ventricle wall.

Answer: (2)

AIPMT 2003

Keep practising — Body Fluids and Circulation

2

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.
AIPMT 2003
3

Impulse of heart beat originates from

  1. SA node
  2. AV node
  3. vagus nerve
  4. cardiac nerve
AIPMT 2002
4

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
AIPMT 2002
5

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.
Out of syllabusAIPMT 2002
6

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
AIPMT 2001
7

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

  1. no endothelium
  2. valves
  3. thicker walls
  4. oxygenated blood
AIPMT 2000
8

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
AIPMT 2000
9

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
AIPMT 2000

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