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Body Fluids and Circulation · Question 55

AIPMT 2009MCQEasy📈 Topic in 25% papers+4−1
1

In a standard ECG which one of the following alphabets is the correct representation of the respective activity of the human heart?

  1. S - start of systole
  2. T - end of diastole
  3. P - depolarisation of the atria
  4. R - repolarisation of ventricles

Answer

(3) P - depolarisation of the atria

Solution

As per NCERT:

The P-wave represents the electrical excitation (or depolarisation) of the atria, which leads to the contraction of both the atria.

The QRS complex represents the depolarisation of the ventricles, which initiates the ventricular contraction (start of systole marked by Q).

The T-wave represents the return of the ventricles from excited to normal state (repolarisation); its end marks the end of systole.

P - depolarisation of the atria is the correct representation.

Answer: (3)

AIPMT 2009

Keep practising — Body Fluids and Circulation

2

Globulins contained in human blood plasma are primarily involved in

  1. osmotic balance of body fluids
  2. oxygen transport in the blood
  3. clotting of blood
  4. defence mechanisms of body.
AIPMT 2009
3

Compared to blood our lymph has

  1. plasma without proteins
  2. more WBCs and no RBCs
  3. more RBCs and less WBCs
  4. no plasma.
AIPMT 2009
4

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
AIPMT 2008
5

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
6

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
7

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
8

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
9

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
10

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
11

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

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