Q. No.Choose the incorrect match
1.
Cardiac arrest
–
Condition in which heart stops beating
2.
T-wave
–
Represents depolarization of ventricles
3.
SAN
–
Generates maximum number of actionpotentials
4.
P-wave
–
Represents contraction of both atria
Choose the incorrect match with respect to blood component
| 1. | Leucocytes – 6000 - 8000 mm–3 |
| 2. | Globulins – Involved in defence mechanisms |
| 3. | O– blood group – Antibodies A and B absent |
| 4. | Thrombokinase – Converts prothrombin into thrombin |
Which of the following is least likely to be caused by reduced blood/oxygen supply to heart muscles?
| 1. | Atherosclerosis |
| 2. | Myocardial ischaemia |
| 3. | Angina pectoris |
| 4. | Heart attack |
Which of the following plasma protein helps in coagulation of blood ?
| 1. | Fibrin | 2. | Prothrombin |
| 3. | Vitamin K | 4. | Albumin |
Which of the following disorders of circulatory system is not correctly stated?
| 1. | Hypertension – A sustained blood pressure of 140/90 or above |
| 2. | CAD – The lumen of coronary arteries become narrower due to deposits of calcium, fat, cholesterol and fibrous tissue |
| 3. | Atherosclerosis – Heart muscle is suddenly damaged by inadequate blood supply |
| 4. | Heart failure – Usually called congestive heart failure because congestion of lungs is one of the main symptoms of the disease |
In a mm3 of blood, the maximum number and minimum number of cells would be respectively
| 1. | WBCs, RBCs | 2. | RBCs, WBCs |
| 3. | RBCs, Platelets | 4. | Platelets, WBCs |
Which of the following statements is not true for the human heart?
| 1. | Adrenal medullary hormones can increase the cardiac output |
| 2. | Neural signal through the sympathetic nerves can initiate the heart beat |
| 3. | Increase in BMR due to thyroxine can indirectly increase heart rate |
| 4. | Strength of ventricular contraction and cardiac output is increased by catecholamines |
During ECG of a healthy person, P-wave represents
1. Ventricular depolarisation
2. Ventricular repolarisation
3. Joint diastole
4. Atrial depolarisation
Which of the following is correct regarding
thrombin?
| 1. | It is a protein of primary structure |
| 2. | Converts soluble fibrinogen of plasma into insoluble fibrin |
| 3. | Converts insoluble fibrinogen into insoluble fibrin |
| 4. | Converts fibrin into fibrinogen |
Complete stoppage of heart beat is termed as
| 1. | Heart attack | 2. | Heart block |
| 3. | Cardiac arrest | 4. | Heart failure |
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