| I: | All vertebrates possess a muscular chambered heart. |
| II: | Fishes have a 2-chambered heart with an atrium and a ventricle. |
| III: | All amphibians and all reptiles have a 3-chambered heart. |
| 1. | 0 | 2. | 1 |
| 3. | 2 | 4. | 3 |
| 1. | Heart Attack | 2. | Heart Failure |
| 3. | Cardiac Arrest | 4. | Angina pectoris |
| 1. | Left ventricle | 2. | Left atrium |
| 3. | Right atrium | 4. | Right ventricle |
| 1. | A heart attack is a chronic condition where the heart is unable to pump sufficiently; heart failure is an acute event caused by blockage. |
| 2. | A heart attack results from the blockage of coronary arteries; heart failure is a condition where the heart can't pump blood effectively. |
| 3. | Heart failure is always caused by a heart attack. |
| 4. | Heart attacks and heart failures are different terms for the same condition. |
| Assertion (A): | The human heart is myogenic. |
| Reason (R): | Heartbeat is initiated by a group of specialized cardiac muscle cells known as the sinoatrial node. |
| 1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
| 3. | (A) is True but (R) is False. |
| 4. | (A) is False but (R) is True. |
| I: | The tricuspid valve is present between the left atrium and left ventricle. |
| II: | Purkinje fibers help in conducting the cardiac impulse to the myocardium of ventricles. |
| III: | The sinoatrial node acts as the pacemaker of the heart. |
| IV: | Atrial contraction increases the ventricular filling. |
| Assertion (A): | Blood pressure in the arteries is pulsatile. |
| Reason (R): | This is due to the rhythmic pumping action of the heart. |
| 1. | Both (A) and (R) are True and (R) is the correct explanation of (A) |
| 2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
| 3. | (A) is True but (R) is False. |
| 4. | (A) is False but (R) is True. |
| I: | has the same mineral distribution as that in plasma. |
| II: | has more protein than that in plasma. |
| 1. | neutrophils | 2. | eosinophils |
| 3. | basophils | 4. | lymphocytes |