People living in high altitudes (like mountains) usually have a _________?
Correct answer: B. larger number of Red Blood Cells
- A. smaller number of Red Blood Cells
- B. larger number of Red Blood Cells
- C. smaller number of White Blood Cells
- D. larger number of White Blood Cells
Explanation
At high altitude, lower oxygen pressure stimulates the kidneys to release erythropoietin, increasing red blood cell production. The extra red cells help carry more oxygen to tissues.
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The human body is studied through its organ systems, including digestion, respiration, circulation, excretion, nervous coordination, reproduction and immunity. Coverage also includes nutrients and deficiency diseases, hormones, blood groups, common infections, vaccines, sanitation and basic first aid, while distinguishing communicable diseases from inherited and lifestyle disorders.
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