Class 11 | Biology | Chapter 17 | Breathing and Exchange of Gases
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Class 11 | Biology | Chapter 17 | Breathing and Exchange of Gases
Assertion: If two men, expire the same volume of air after normal inspiration, they have the same expiratiory capacity. Reason: Expirtory capacity includes tidal valume and inspiratory reserve volume.
Class 11 | Biology | Chapter 17 | Breathing and Exchange of Gases
Assertion: A sigmod curve is obtained when percentage saturation of haemoglobin with O2 is plotted against the pO2 . Reason: Every 100 mL of oxygenated blood can deliver around 5mL of O2 to the tissues under normal physiological conditions.
Class 11 | Biology | Chapter 17 | Breathing and Exchange of Gases
Which one of the followings statements is not correct? (a) Total volume of air a person can expire after a normal inspiration is called expiratory capacity. (b) Binding of oxygen with haemoglobin is primarily related to partial pressure of CO2 . (c) Every 100 ml of deoxygenated blood delivers approximately 4 ml of CO2 to the alveoli. (d) Every 100 ml of oxygenated blood can deliver around 5 ml of O2 to the tissues under normal physiological conditions
Class 11 | Biology | Chapter 18 | Body Fluids and Circulation
Read the following statements and select the correct option. (i) Carbonic anhydrase is present in the erythrocytes . (ii) In erythrocytes the carbon dioxide combine with water and is transported.
Class 11 | Biology | Chapter 18 | Body Fluids and Circulation
Which of the following statements are true/false? (i) The blood transports CO2 comparatively easily because of its higher solubility. (ii) Approximately 8 -.9% of CO2 is transported being dissolved in the plasma of blood. (iii) The carbon dioxide produced by the tissues, diffuses passively into the blood stream and passes into red blood corpuscles and react with water to form H2CO3 (iv) The oxyhaemoglobin (HbO2 ) of the erythrocytes is basic. (v) The chloride ions diffuse from plasma into the erythrocytes to maintain ionic balance.
Class 11 | Biology | Chapter 17 | Breathing and Exchange of Gases
Which of the following statement correctly defines Bohr effect? (a) Rise in p50 with a decrease in CO2 conc. (b) Rise in p50 with decrease in pH. (c) Rise in p50 with increase in O2 . (d) Fall in p50 with decrease in pH
Class 11 | Biology | Chapter 17 | Breathing and Exchange of Gases
With reference to human respiration, which is correct? (a) Pulmonary ventilation is equal to alveolar ventilation. (b) Alveolar ventilation is more than pulmonary ventilation. (c) Alveolar ventilation is less than pulmonary ventilation. (d) Pulmonary ventilation is less than alveolar ventilation.
Class 11 | Biology | Chapter 21 | Neural Control and Coordination
The pneumotaxic centre that can moderate the function of respiratory rhythm centre is located in (a) dorsal side of medulla (b) ventral side of medulla (c) aortic arch and carotid artery (d) pons varolii
Class 11 | Biology | Chapter 21 | Neural Control and Coordination
The respiratory centre, which regulates respiration, is located in (a) cerebral peduncle (b) vagus nerve (c) pons varolii (d) medulla oblongata
Class 11 | Biology | Chapter 17 | Breathing and Exchange of Gases
Carbonic anhydrase is found in high concentration in (a) leucocytes (b) blood plasma (c) erythrocytes (d) lymphocytes
Class 11 | Biology | Chapter 17 | Breathing and Exchange of Gases
When the oxygen supply to the tissue is inadequate, the condition is (a) Dyspnea (b) Hypoxia (c) Asphyxia (d) Apnea
Class 11 | Biology | Chapter 17 | Breathing and Exchange of Gases
The vital capacity of human lung is equal to (a) 500 mL (b) 4600 mL (c) 5800 mL (d) 2300 mL
Class 11 | Biology | Chapter 17 | Breathing and Exchange of Gases
Although much CO2 is carried in blood, yet blood does not become acidic, because (a) it is absorbed by the leucocytes. (b) blood buffers play an important role in CO2 transport. (c) it combines with water to form H2CO3which is neutralized by NaCO3. (d) it is continuously diffused through tissues and is not allowed to accumulate.
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Class 11 | Biology | Chapter 17 | Breathing and Exchange of Gases,Formula Sheets
