Which of the following conditions causes erythroblastosis fetalis?

1. Mother ${\mathrm{Rh}}^{+\mathrm{ve}}$ and fetus ${\mathrm{Rh}}^{-\mathrm{ve}}$

2. Mother ${\mathrm{Rh}}^{-\mathrm{ve}}$ and fetus ${\mathrm{Rh}}^{+\mathrm{ve}}$

3. Both mother and fetus ${\mathrm{Rh}}^{-\mathrm{ve}}$

4. Both mother and fetus ${\mathrm{Rh}}^{+\mathrm{ve}}$

Which of the following is associated with a decrease in cardiac output?

(1) Sympathetic nerves

(2) Parasympathetic neural signals

(3) Pneumotaxic center

(4) Adrenal medullary hormones

Match the following columns and select the correct option:

The QRS complex in a standard ECG represents:

1.  Depolarisation of auricles

2.  Depolarisation of ventricles

3. Repolarisation  of ventricles

4.  Repolarisation of auricles 

A specialised nodal tissue embedded in the lower corner of the right atrium, close to atrio-ventricular septum, delays the spreading of impulses to heart apex for about 0.1 sec.

This delay allows -

1. blood to enter aorta.
2. the ventricles to empty completely.
3. blood to enter pulmonary arteries.
4. the atria to empty completely.

All the components of the nodal tissue are autoexcitable. Why does the SA node act as the normal pacemaker?

Match the Column I and Column II:

Examination of the 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. Thiamine

2. Folic acid and cobalamine

3. Riboflavin

4. Iron compounds

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

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