Breathing and Respiration, Exchange of Gases
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HUMAN PHYSIOLOGY (Breathing and Respiration, Exchange of Gases)
Biology Objective Type Theoretical Questions - TQ 3 (Q. No.61-67)
- For Q. No. 1-30 click: Biology Objective Very Short Answer Type Questions - Breathing and Respiration, Exchange of Gases
- For Q. No. 31-60 click: Breathing and Respiration, Exchange of Gases - Biology Objective Questions for NEET-UG, AIPMT, MBBS and Dental admission tests
- For Q. No. 68-71 click: Breathing and Respiration, Exchange of Gases - long answer questions for Entrance Exams and Admission Tests
- For Q. No. 72-75 click: Biology Guide for NEET, MBBS admission tests: Breathing and Respiration, Exchange of Gases - very long answer questions
Question: 61: How does haemoglobin help in the transport of oxygen from to tissues?
Question: 62: What is the vital capacity of lungs?
Question: 63: What is the role of carbonic anhydrase in humans? Where is it present?
Question: 64: Write down the reaction facilitated by an enzyme carbonic anhydrase present in RBCs.
Question: 65: In which form, CO2 is trapped at the tissue level?
Question: 66: How pneumotaxic centre regulates the respiratory rate?
Question: 67: How can a person prevent himself from occupational respiratory diseases?
India Study Solution
Biology Guide: Breathing and Respiration, Exchange of Gases
Solutions of Biology Objective Short Answer Type Theoretical Questions - TQ 3 (Q. No. 61-67)
Solution-61: Transport of oxygen: Haemoglobin is a red coloured pigment present in RBC. O2 can bind with Hb in a reversible manner to form oxyhaemoglobin. This transport 97% to 99% oxygen as oxyhaemoglobin.
Solution-62: Volume of air, which expired forcefully after forceful inspiration.
Vital capacity = IRV+ERV+TV
= 3000+1100+500
= 4600 ml.
Solution-63: This percentage of CO2 diffuse in RBC and dissolve in water of cytoplasm to form carbonic acid. Formation of carbonic acid is occurring in presence of carbonic anhydrase enzyme, which increase rate of formation of carbonic acid 5000 times. It is present in RBC.
Solution-64:
Solution-65: Nearly 20-25% of CO2 is transported by RBCs whereas 70% of it is carried as bicarbonate. About 7% of CO2 is carried in a dissolved state through plasma. HCO3- ions (bicarbonate ions).
Solution-66: Strong neural signal from this center to inspiratory area increased the rate of breathing because inspiration and expiration is shortened.
Solution-67: (i) By wearing protective masks. (ii) By avoiding prolonged exposure to harmful substances.
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