When the heart beats, the familiar lub-dup
sound occurs as the valves of the heart _____.

1. open

2. close

3. expand

4. contract

Which of the following statements is not correct about
ECG?

1. P wave represents atrial depolarisation.

2. QRS wave initiates ventricular contraction.

3. The end of T wave marks the end of ventricular
systole.

4. Q wave marks the beginning of atrial systole.

Hemolytic disease of the newborn (HDN) may occur in the feotus of a second pregnancy if:

1. The mother is ${\mathrm{Rh}}^{+}$ and the baby is ${\mathrm{Rh}}^{-}$

2. The mother is ${\mathrm{Rh}}^{+}$ and the baby is ${\mathrm{Rh}}^{+}$

3. The mother is ${\mathrm{Rh}}^{-}$ and the baby is ${\mathrm{Rh}}^{-}$

4. The mother is ${\mathrm{Rh}}^{-}$ and the baby is ${\mathrm{Rh}}^{+}$

Which of the following sequences best represents the pathway of an action potential through the Heart's conduction system?

(i) Sino-atrial (SA) node

(ii) Purkinje fibres

(iii) Bundle of His

(iv) Atrio-ventricular (AV) node

(v) Right and left bundle branches

1. (i),(iv),(iii),(ii),(v)

2. (iv), (i),(iii),(v),(ii)

3. (iii),(iv),(i),(ii),(v)

4. (i),(iv),(iii),(v),(ii)

Select the option having all the correct characteristics :

	Structure	Percentage	Function
1.		0.3-0.5	Phagocytic
2.		0.5-1.0	Secrete histamine
3.		30-40	Defense against parasites
4.		30-40	Allergic reactions

Match the vessels in Column-I with appropriate organs in Column-II:

1. (A)$\to$(r), (B)$\to$(s),(C)$\to$(p),(D)$\to$(q)

2. (A)$\to$(r),(B)$\to$(q),(C)$\to$(s),(D)$\to$(p)

3. (A)$\to$(s),(B)$\to$(p),(C)$\to$(r),(D)$\to$(q)

4. (A)$\to$(s),(B)$\to$(q),(C)$\to$(p),(D)$\to$(r)

Thrombokinase performs a specific function in human body

Choose the correct option

1. Thrombin        $\stackrel{}{\to }$      Prothrombin    

2. Fibrinogen       $\stackrel{}{\to }$      Fibrin

3. Fibrin              $\stackrel{}{\to }$      Fibrinogen

4. Prothrombin    $\stackrel{}{\to }$       Thrombin

T-wave in electrocardiogram represents

1. The return of ventricles from excited to normal state.

2. Depolarisation of ventricles from normal to excited state.

3. Onset of atrial systole.

4. Onset of atrial diastole.

Heart disorder in which cardiac muscles are suddenly damaged by inadequate supply of blood is 

1. Heart failure

2. Cardiac arrest

3. Heart attack

4. Atherosclerosis

Different blood groups are due to:

1. Specific antigens on the surface of WBCs
2. Specific antibodies on the surface of RBCs
3. Specific antigens on the surface of RBCs
4. Specific type of haemoglobin in RBCs