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Which two of the following changes (a-d) usually tend to occur in the plain dwellers when they move to high altitudes (3500 m or more)?
(i) Increase in red blood cell size
(ii) Increase in red blood cell production
(iii) Increased breathing rate
(iv) Increase in thrombocyte count
Changes occurring are:
Options
(a) (ii) and (iii)
(b) (iii) and (iv)
(c) (i) and (iv)
(d) (i) and (ii)
Correct Answer:
(ii) and (iii)
Explanation:
At high altitude, the body undergoes numerous changes in order to increase oxygen delivery to cells and improve the efficiency of oxygen usage. The early changes include increased breathing rate and increased red blood cell production.
Related Questions: - Which hormones promote the flowering in long day plants and also control sex
- Cholesterol is the precursor of
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Topics: Human Physiology Systems
(35)
Subject: Biology
(4253)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- Which hormones promote the flowering in long day plants and also control sex
- Cholesterol is the precursor of
- Age of a tree can be estimated by :
- A large proportion of oxygen is left unused in the human blood
- The restriction endonuclease is used for cutting
Topics: Human Physiology Systems (35)
Subject: Biology (4253)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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