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InterviewSolution
This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 151. |
Mammalian lungs have an enormous number of minute alveoli (air sacs). This is to allowA. more surface area for difusion of gasesB. more space for increasing the volume of inspired airC. more nerve supply to keep the lungs workingD. more spongy texture for keeping lung in proper shape. |
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Answer» Correct Answer - A The numbe of alveoli in the human lungs has been estimated to be approximately `300` million. This cnormous number of alveoli are meant to increase surface area of lungs for diffusion of gases. |
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| 152. |
Mammalian lungs have enormous number of minute alveoli (air sacs). It is to allowA. More space for increasing the volume of inspired airB. More surface area for diffusion of gasesC. More spongy texture for keeping lungs in proper shapeD. More nerve supply to keep organs active when working |
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Answer» Correct Answer - b in mammalian lungs each alveolar duct ends in a passage , called atrium , which leads into a number of rounded alveolar sacs. Each alveolar sac is studded with a large number of air sacs or alveoli. Alveoli are the sites of respiration. |
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| 153. |
Mammalian lungs have an enormous number of minute alveoli (air sacs). This is to allowA.  Increasing volume of inspired air B. Keeping the lungs in proper shape C. Higher number of muscles to provide greater elasticity D. Increasing surface area for gaseous diffusion |
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Answer» Correct Answer - D Mammalian lungs have numerous alveoli for increasing surface area for gaseous diffusion. |
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| 154. |
Mammalian lungs have an enormous number of minute alveoli (air sacs). This is to allowA. more space for incrasing the volume of inspired airB. more surface area for diffusion of gasesC. more spongy texture for keeping lungs in proper shapeD. more nerve supply to keep the lungs working |
| Answer» Correct Answer - B | |
| 155. |
Maximum amount of air that can exchanged per minute isA. inhale capacity and reserved volumeB. tidal volume and reserved volumeC. vital capacityD. exhale capacity and reserved volume |
| Answer» Correct Answer - C | |
| 156. |
Vital capacity of lung isA. Inspiratory Reserve Volume (IRV) + Expiratory Reserve Volume (ERV) + Tidal volume (TV) + Residual Volume ( RV)B. IRV + ERV + TVC. IRV + ERVD. IRV + ERV + TV - RV |
| Answer» Correct Answer - B | |
| 157. |
the largest quantity of air that can be expired after a maximum inspiratory effort isA. Residual volumeB. Tidal volumeC. Vital capcity of lungD. Lung volume |
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Answer» Correct Answer - c vital capacity of lungs to expire maximum volume of air after a deep inspiration. The largest quantity of air that can be expiresd after a maximal inspiratory. Vital capacity is equal the sum of the tidal, complemental and supplemental air (500 + 3100 +1200 = 4800 ml) |
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| 158. |
During normal respiration, without any effort, the volume of air insipred or expired is calledA. tidal volumeB. reserve volumeC. residual volumeD. none of these |
| Answer» Correct Answer - A | |
| 159. |
The largest quantity of air that can be expired in a single respiration after a maximal inspiratory effort is calledA. residual volumeB. tidal volumeC. expiratory rescrve volumeD. total lung volume |
| Answer» Correct Answer - C | |
| 160. |
If a person breathes with maximal effort but with his nose and mouth closed, the alveolar pressure can be decreased to as low asA. `- 80 mm Hg`B. `+10 mm Hg`C. `-180 mm Hg`D. `-250 mm Hg` |
| Answer» Correct Answer - a | |
| 161. |
One haemoglobin carries how many molecules of `O_(2)` ?A. 4B. 2C. 6D. 8 |
| Answer» Correct Answer - A | |
| 162. |
Fill in the blanks: The ...a... is utilised by the organisms to indirectly breakdown nutrient molecule like glucose to derive ...b... for performing various activities.b For catabolism, ......c has to be continuously provided to the cells and ...d... produced by cells have to be reieased outA. a-energy, b-oxygen, c-oxygen, d-`CO_(2)`B. `a-O_(2), "b-energy", c-CO_(2), d-O_(2)`C. `"a-energy", b-O_(2), c-CO_(2), d-O_(2)`D. `a-O_(2), "b-energy ",c-CO_(2),d-O_(2)` |
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Answer» Correct Answer - D The `O_(2)` is utilised by the organism to indirectly breakdown nutrient molecule like glucose to derive energy for performing various activities. For catabolism, `O_(2)` has to be continuously provided to the cells and `CO_(2)` produced by cells have to be released out. |
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| 163. |
The following diagram shows a section of an alveolus in a human lung. Which conditions would result in the maximum rate of diffusion of oxygen from the alveolus into the blood capillary ? |
| Answer» Correct Answer - C | |
| 164. |
What is the maximum number of `O_(2)` molecules with one haemoglobin molecule can carry ? |
| Answer» Four `O_(2)` molecules. | |
| 165. |
Amount of air exchangeed in breathing can be measured with aA. spherometerB. BarometerC. spirometerD. sphygmomanometer |
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Answer» Correct Answer - c Spirometry is the process of recording the changes in the volume movement of air into and out of lung and the instrument used for the purpose is called spirometer or respirometer. |
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| 166. |
The most important physioloical feature of haemoglobin isA. its red colourB. presence of ironC. presence of basic protein globiD. its ability to combine reversibly with oxygen |
| Answer» Correct Answer - D | |
| 167. |
The chemical formula of oxyhaemoglobin isA. `Hb(O_(2))_(4)`B. `Hb(O_(3))_(4)`C. `Hb_(2)O_(2)`D. `Hb(O_(2))_(6)` |
| Answer» Correct Answer - A | |
| 168. |
How does haemoglobin help in the transport of oxygen from lung to tissue? |
| Answer» Haemoglobin combines with oxygen and becomes oxyhaemoglobin in pulmonary capillaries. This oxygenated blood circulates in the body. When it reaches the tissues having low partial pressure of oxygen the oxygen is released into the tissues. | |
| 169. |
how many molecules of oxygen are bound to one molecule of haemoglobinA. TwoB. ThreeC. FourD. Six |
| Answer» Correct Answer - C | |
| 170. |
how many molecules of oxygen are bound to one molecule of haemoglobinA. oneB. twoC. threeD. four |
| Answer» Correct Answer - D | |
| 171. |
how many molecules of oxygen are bound to one molecule of haemoglobinA. 1B. 2C. 3D. 4 |
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Answer» Correct Answer - d one molecular of the haemoglobin has 4 haem groups and each of them is capable of taking up one moleucle of `O_(2)` |
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| 172. |
Assertion: `O_(2)` gets bound to haemoglobin in the lung surface and gets dissociated at the tissues. Reason: `CO_(2)` trapped as bicarbonate at the tissue 1 and transported to the alveoli is released out as `CO_(2)`.A. If both assertion and reason are true and the reason is the correct explanation of the assertion.B. If both assertion and reason are true but reason is not the correct explanation of the assertion.C. If assertion is true but reason is false.D. If both assertion and reason are false. |
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Answer» Correct Answer - B `O_(2)` gets bound to haemoglobin in the lung surface and gets dissociated at the tissues. `CO_(2)` trapped as bicarbonate at the tissue level and transported to the alveoli is released out as `CO_(2)`. |
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| 173. |
Assertion : At the tissue level, 70 percent of `CO_(2)` formed from contabolism is trapped as bicarbonate in the RBCs. Reason : At tissue level, carbonic anhydrase in RBCs facilites the formation of `CO_(2)` and `H_(2)O` from bicarbonate.A. If both assertion and reason are true and reason is the correct explanation of assertionB. If both assertion and reason are true and reason is not the correct explanation of assertionC. If assertion is true but reason is false.D. If both assertion and reason are false. |
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Answer» Correct Answer - C RBCs contain a very high concentration of carbonic anhydrase enzyme which facilitates the following reaction in both direactions. `CO_(2) + H_(2)Ooverset("carbonic anhydrase")hArrH_(2)CO_(3)hArroverset("carbonic anhydrase")hArr HCO_(3)^(-)+H^(+)` At the tissues site where partial pressur of `CO_(2)` is high due to catabolism, `CO_(2)` diffuses into blood (RBCs and plasma) and forms `HCO_(3)^(-)` and `H^(+)`. At the alveolar site where `PCO_(2)` is low, the reaction proceeds in the oppsite direction leading to the formation of `CO_(2)` and `H_(2)O`. |
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| 174. |
Assertion A quatic organisms such as protozoans respire through simple diffusion process.Reason their outermost covering remains moist.A. Both Assertion and Reason are true and Reason is the correct explanation of AssertionB. Both Asssertion and Reason are true, but Reason is not the correct explanation of AssertionC. Assertion is true, but Reason is trueD. both Assertion and Reason are flase. |
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Answer» Correct Answer - A The cell membane of aquatic organisms such as protozoans remains moist, it serves, as the respiratory surface. Oxygen and carbon dioxide simply diffuse across this thin layer. |
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| 175. |
Which of the following statement is correct?A. The contraction of internal intercostal muscles lifts up the ribs and sternum.B. The RBCs transport oxygen only.C. The thoracic cavity is anatomically an air tight chamber.D. Healthy men cap inspire appromixmately `500` mL of air per minute. |
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Answer» Correct Answer - C The thoracic cavity is anatomically an air tight chamber as it consists of lungs that further consists of air sacs in which the air remains trapped. The contraction of the external intercostal muscles lifts up the ribs the sternum. RBCs transport both `O_(2)` and `CO_(2)`. Healthy man can inspire or expire `6000` to `8000` mL of air pre minute. |
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| 176. |
in human beings, lungs are divided intoA. 3 right and 2 left lobesB. 2 right and 3 left lobesC. 2 right and 2 left lobesD. none of these |
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Answer» Correct Answer - a in man , the left lungs has two lobes, superior lobe and inferior lobe , the right lunfs has three lobes superior lobe , middle lobe and inferior lobe. |
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| 177. |
In carbon monoxide poisoning there isA. Increase in carbon dioxide concentratlonB. Decrease in oxygen availabihtyC. Decrease in free haemoglobinD. None of the above |
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Answer» Correct Answer - C In carbon monoxide poisoning there is decrease in free haemoglobin. |
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| 178. |
Which of the following statement is true about RBCs in humans?A. They do not carry `CO_(2)` at allB. They carry about `20-25% of CO_(2)`C. They transport `99.5% of O_(2)`D. They transport about 80% oxygen only and the rest |
| Answer» Correct Answer - B | |
| 179. |
What is true about RBCs in humans?A. They do not carry `CO_(2)` at allB. They carry both `CO_(2)` and `O_(2)`C. They transport 99.5 percent of `O_(2)`D. They transport about 80 percent oxygen only and the rest 20 precent of it is trancported in dissolved state in blood plasma |
| Answer» Correct Answer - B | |
| 180. |
Which of the following statement is true about RBCs in humans?A. They transport 99.5% of `O_(2)`B. They transport 80% oxygen, the rest 20%being transport by plasmaC. They do not carry `CO_(2)` at all.D. They carry 20-25% of `CO_(2)` |
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Answer» Correct Answer - D Blood is the medium of transport for `O_(2)" and "CO_(2)`. About 97 per cent of `O_(2)` is transported by RBCs in the blood. The remaining 3 per cent of `O_(2)` is carried in a dissolved state through the plasma. Nearly 20-25 per cent of `CO_(2)` is transported by RBC8 whereas 70 per cent of it is carried as bicarbonate (Sodium bicarbonate). About 7 per cent of `CO_(2)` is carried in a dissolved state through plasma. |
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| 181. |
Which of the following statement is true about RBCs in humans?A. They carry about `20-25` percent of `CO_(2)`.B. They transport `99.5` percent of `O_(2)`C. They transpart about `80` per cent oxygen only and the rest `20` percent of it is transported in dissolved state in blood plasma.D. They do not carry `CO_(2)` at all. |
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Answer» Correct Answer - A Nearly `20-25%` of `CO_(2)` is transported by `RBCs` whereas `70%` of it is carried as bicarbonate. About `7%` of `CO_(2)` is carried in a dissolved state through plasma. About `97%` of `O_(2)` is carried by `RBCs` in the blood. About `3%` of `O_(2)` is transported in a dissolved state through the plasma. |
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| 182. |
Bulk of carbon dioxide `(CO_(2))` released from body tissues into the blood is present asA. 70% carbamino-haemoglobin and 30% as bicarbonateB. Carbamino-haemoglobin in RBCsC. Bicarbonate in blood plasma and RBCsD. Free `CO_(2)` in blood plasma |
| Answer» Correct Answer - C | |
| 183. |
Bulk of carbon dioxide `(CO_(2))` released from body tissues into the blood is present asA. bicarbonate in blood plasma and rbcsB. free `cO_(2)` in blood plasmaC. 70% carbamino haemoglobin and 30 % as bicarbonateD. carbamino haemoglobin in RBCs |
| Answer» Correct Answer - A | |
| 184. |
Assertion: Every 100 ml of oxygenated blood can deliver around 4 ml of `O_(2)` to tissues under normal physiologieal conditions. Reason: Every 100 ml of deoxygenated blooddelivers approx1mately 5 ml of `CO_(2)` to the alveoli.A. If both assertion and reason are true and the reason is the correct explanation of the assertion.B. If both assertion and reason are true but reason is not the correct explanation of the assertion.C. If assertion is true but reason is false.D. If both assertion and reason are false. |
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Answer» Correct Answer - D Every 100 ml of oxygenated blood can deliver around 5 ml of `O_(2)` to tissues under normal physiological conditions. Every 100 ml of deoxygenated blood delivers approximately 4 ml of `CO_(2)` to the alveoli. |
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| 185. |
Bulk of carbon dioxide `(CO_(2))` released from body tissues into the blood is present asA. bicarbonate in blood plasma and RBGsB. 70% carbnamino-haemoglobin and 30% as bicarbonateC. free `CO_(2)` in blood plasmaD. carbamino -haemoglobin in RBCs |
| Answer» Correct Answer - A | |
| 186. |
Maximum amount of oxygen is lost from the blood in theA. Capillaries surrounding the tissue cellsB. Arteries of the bodyC. Capillaries surrounding the alveoliD. Left auricle of the heart |
| Answer» Correct Answer - c | |
| 187. |
the structre which prevents the entry of food into respiratory isA. GulletB. GlottisC. TonsilD. Epiglottis |
| Answer» Correct Answer - D | |
| 188. |
which of the following conditions is responsible for increase in ventilation rate of lungs ?A. Increases of `CO_(2)` content in inhaled airB. Increase of `CO_(2)` content in exhaled airC. Decrease of `O_(2)` content in inhaled airD. Decrease of `O_(2)` content in exhaled air |
| Answer» Correct Answer - A | |
| 189. |
The ventilation movements of the lungs in mammals are governed byA. diaphragmB. costal musclesC. both (a) and (b)D. muscular wall of lung |
| Answer» Correct Answer - C | |
| 190. |
Step of repiration are controlled byA. SubstratesB. EnzymesC. HormoneD. Bile juice |
| Answer» Correct Answer - b | |
| 191. |
Which of the following prevents collapsing of TracheaA. MusclesB. DiaphragmC. RibsD. Cartilaginous rings |
| Answer» Correct Answer - D | |
| 192. |
which of the following conditions is responsible for increase in ventilation rate of lungs ?A. increase in `O_(2)` onctent of inhaled airB. decrease in `O_(2)` content of exhaled airC. increase of `CO_(2)` content in inhaled airD. increase of `CO_(2)` cotent in exhaled air |
| Answer» Correct Answer - C | |
| 193. |
Bulk of carbon dioxide `(CO_(2))` released from body tissues into the blood is present asA. 70 % carbamino-haemoglobin and 30% as bicarbonateB. Carbamino-haemoglobin in RBCsC. Bicarbonate in blood plasma and RBCsD. Free `CO_(2)` in blood plasma |
| Answer» Correct Answer - c | |
| 194. |
Which of the following blood vessels in the circulatory system of frog has more oxygenated bloodA. Pulmocutaneous arteryB. Pulmocutaneous veinC. Pulmonary arteryD. Precaval veins |
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Answer» Correct Answer - b the oxygenated blood from two lungs os collected by right and left pulmmonary veins, which unite to from a common pulmonary vein (pulmocutaneous vein) which open directly into the left auricle , on the dorsal side. |
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| 195. |
Which of the following statement correctly defines "Bohr effects"A. Rise in `PCO_(2)` with a decrease in `CO_(2)` concentrationB. Rise in `PCO_(2)` with an increase in `CO_(2)` concentrationC. Rise in `PCO_(2)` with an increase in `CO_(2)` and decrease in `PO_(2)`D. Rise in `PCO_(2)` with a decrease in pH (concentration at which 50% haemoglobin of blood is saturated with oxygen) |
| Answer» Correct Answer - d | |
| 196. |
After fast running, man has fast heart beat, slow pulse and shallow breathing, in such conditions he hasA. Oxygen debtB. Poisoning due to lactic acidC. No pulmonary pressureD. Weak heart |
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Answer» Correct Answer - a rate of `O_(2)` supply by lungs into muscles falls down during active work or in exercise. Muscles accumulate lactic acid and slowly breathing becomes hard so as to inceases `O_(2)` intake in lungs.this stage is called oxygen debt. |
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| 197. |
When `CO_(2)` concentration in blood increases breathing becomesA. Slow and deepB. Faster and deeperC. Shallower and slowD. There is no effect on breathing |
| Answer» Correct Answer - B | |
| 198. |
which of the following conditions is responsible for increase in ventilation rate of lungs ?A. Increase of `CO_(2)` concentration in bloodB. Increasing `O_(2)` concentration in bloodC. Decreasing `O_(2)` concentration in bloodD. Introducing CO in blood |
| Answer» Correct Answer - a | |
| 199. |
A substance that prevents or delays oxidation isA. BactericidalB. HormoneC. AntioxidantD. Enzyme |
| Answer» Correct Answer - c | |
| 200. |
When `CO_(2)` concentration in blood increases breathing becomesA. IncreaseB. Decrease rapidlyC. StopD. Remain unchanged |
| Answer» Correct Answer - A | |