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Body Fluids and Circulation · Question 58

AIPMT 2008MCQEasy📈 Topic in 38% papers+4−1
1

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

  1. stimulation of the sino auricular node
  2. pressure difference between the post caval and atrium
  3. pushing open of the venous valves
  4. suction pull

Answer

(2) pressure difference between the post caval and atrium

Solution

During atrial diastole the right atrium is relaxed, so the pressure inside it is low.

⇒ The pressure of blood in the post caval (inferior vena cava) is higher than that in the relaxed atrium.

∴ Blood flows from the post caval into the right atrium along this pressure difference.

As per NCERT, during joint diastole blood from the venae cavae flows into the right atrium (and from there into the ventricle) because the chambers are relaxed.

Answer: (2)

AIPMT 2008

Keep practising — Body Fluids and Circulation

2

The most active phagocytic white blood cells are

  1. eosinophils and lymphocytes
  2. neutrophils and monocytes
  3. neutrophils and eosinophils
  4. lymphocytes and macrophages
AIPMT 2008
3

Which type of white blood cells are connected with the release of histamine and the natural anticoagulant heparin?

  1. Eosinophils
  2. Monocytes
  3. Neutrophils
  4. Basophils
AIPMT 2008
4

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

  1. Blood serum
  2. Sample from the thoracic duct of lymphatic system
  3. Whole blood from pulmonary vein
  4. Blood plasma
AIPMT 2007
5

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

  1. Serum albumins
  2. Fibrinogen in the plasma
  3. Serum globulins
  4. Haemocytes
AIPMT 2007
6

Examination of blood of a person suspected of having anaemia shows large, immature, nucleated erythrocytes without haemoglobin. Supplementing his diet with which of the following is likely to alleviate his symptoms?

  1. Iron compounds
  2. Thiamine
  3. Folic acid and cobalamin
  4. Riboflavin
Out of syllabusAIPMT 2006
7

You are required to draw blood from a patient and to keep it in a test tube for analysis of blood corpuscles and plasma. You are also provided with the following four types of test tubes. Which of these will you not use for the purpose?

  1. Test tube containing calcium bicarbonate
  2. Chilled test tube
  3. Test tube containing heparin
  4. Test tube containing sodium oxalate.
AIPMT 2004
8

Systemic heart refers to

  1. the heart that contracts under stimulation from nervous system
  2. left auricle and left ventricle in higher vertebrates
  3. entire heart in lower vertebrates
  4. the two ventricles together in humans.
AIPMT 2003
9

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.
AIPMT 2003
10

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.
AIPMT 2003
11

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

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