Which two of the following changes usually occur in plain dwellers when they move to high altitudes ( 3,500 m or more)?(a) Increase in red blood cell - Biology MCQ Biology | ExamTest.live

hardMCQBiologyBiology

1 mark

Which two of the following changes usually occur in plain dwellers when they move to high altitudes (3, 500 m or more)?(a) Increase in red blood cell size(b) Increase in red blood cell production(c) Increased breathing rate(d) Increase in thrombocyte count

Solution & Step-by-step Explanation

To compensate for low oxygen availability at high altitudes:The body increases red blood cell production (erythropoiesis) to transport more oxygen.The body increases the breathing rate to intake more oxygen.The binding affinity of hemoglobin also decreases.

Try it yourself before checking the explanation above.

Which two of the following changes usually occur in plain dwellers when they move to high altitudes (3, 500 m or more)?(a) Increase in red blood cell size(b) Increase in red blood cell production(c) Increased breathing rate(d) Increase in thrombocyte count

(a) and (b)

(b) and (c)

(c) and (d)

(a) and (d)

Practice with timed mock tests and track your performance across Biology.