Lungs do not collapse between breaths and some air always remains in the lungs which can never be expelled because?
| 1. | there is a negative pressure in the lungs |
| 2. | there is a negative intrapleural pressure pulling at the lung walls |
| 3. | there is a positive intrapleural pressure |
| 4. | pressure in the lungs is higher than the atmospheric pressure |
| 1. | Inflammation of bronchioles; decreased respiratory surface |
| 2. | Increased number of bronchioles; increased respiratory surface |
| 3. | Increased respiratory surface; inflammation of bronchioles |
| 4. | Decreased respiratory surface; inflammation of bronchioles |
Match the following columns and select the correct option:
| Column-I | Column-II | ||
| (a) | Pneumotaxic Centre | (i) | Alveoli |
| (b) | O2 Dissociation curve | (ii) | Pons region of the brain |
| (c) | Carbonic Anhydrase | (iii) | Haemoglobin |
| (d) | Primary site of exchange of gases | (iv) | R.B.C. |
| Options: | (a) | (b) | (c) | (d) |
| 1. | (i) | (iii) | (ii) | (iv) |
| 2. | (ii) | (iii) | (iv) | (i) |
| 3. | (iii) | (ii) | (iv) | (i) |
| 4. | (iv) | (i) | (iii) | (ii) |
Match the items given in Column-I with those in Column-II and select the correct option given below:
| Column-I | Column-II | ||
| (a) | Tricuspid valve | (i) | Between left atrium and left ventricle |
| (b) | Bicuspid valve | (ii) | Between right ventricle and pulmonary artery |
| (c) | Semilunar valve | (iii) | Between right atrium and right ventricle |
| Options: | (a) | (b) | (c) |
| 1. | (iii) | (i) | (ii) |
| 2. | (i) | (iii) | (ii) |
| 3. | (i) | (ii) | (iii) |
| 4. | (ii) | (i) | (iii) |
All the components of the nodal tissue are autoexcitable. Why does the SA node act as the normal pacemaker?
| 1. | SA node has the lowest rate of depolarisation |
| 2. | SA node is the only component to generate the threshold potential. |
| 3. | Only SA node can convey the action potential to the other |
| 4. | SA node has the highest rate of depolarisation. |
Match the Column I and Column II:
| Column I | Column II | ||
| (a) | P-waves | (i) | Depolarisation of ventricles |
| (b) | QRS complex | (ii) | Repolarisation of ventricles |
| (c) | T-wave | (iii) | Coronary ischemia |
| (d) | Reduction in the size of T-wave | (iv) | Depolarisation of atria |
| (v) | Repolarisation of atria |
| Options: | (a) | (b) | (c) | (d) |
| 1. | (ii) | (iii) | (v) | (iv) |
| 2. | (iv) | (i) | (ii) | (iii) |
| 3. | (iv) | (i) | (ii) | (v) |
| 4. | (ii) | (i) | (v) | (iii) |
Which enzyme is responsible for the conversion of inactive fibrinogens to fibrins?
| 1. | Epinephrine | 2. | Thrombokinase |
| 3. | Thrombin | 4. | Renin |
Which of the following statements is correct?
| 1. | The descending limb of loop of Henle is impermeable to water. |
| 2. | The ascending limb of loop of Henle is permeable to water. |
| 3. | The descending limb of loop of Henle is permeable to electrolytes. |
| 4. | The ascending limb of loop of Henle is impermeable to water. |
The increase in osmolarity from outer to inner medullary interstitium is maintained due to:
| (i) | Close proximity between Henle's loop and vasa recta |
| (ii) | Counter current mechanism |
| (iii) | Selective secretion of HCO3¯ and hydrogen ions in PCT |
| (iv) | Higher blood pressure in glomerular capillaries |
| 1. | Only (ii) | 2. | (iii) and (iv) |
| 3. | (i), (ii) and (iii) | 4. | (i) and (ii) |
Presence of which of the following conditions in urine is indicative of Diabetes mellitus:
1. Uremia and Renal Calculi
2. Ketonuria and Glycosuria
3. Renal Calculi and Hyperglycaemia
4. Uremia and Ketonuria
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