At sea level,the blood of individuals contains approximately $5$ million red blood cells per cubic millimeter. However,individuals living at an altitude of $5400$ meters have $8$ million red blood cells per cubic millimeter. Why does this increase occur?
- ADue to low atmospheric $O_2$ levels,more red blood cells are required to obtain the necessary $O_2$ for survival.
- BThere is more ultraviolet radiation,which stimulates the production of red blood cells.
- CPeople consume more nutrients,which leads to the production of more red blood cells.
- DPeople breathe pollution-free air,which allows for more oxygen intake.
Explore More
Similar Questions
Choose the correct option:
$(1)$ On an average,a healthy human breathes ...$X$... times/minute.
$(2)$ Every $100 \, ml$ of oxygenated blood can deliver around ...$Y$... of $O_2$ to the tissues under normal physiological conditions.
$X-Y$
$(1)$ On an average,a healthy human breathes ...$X$... times/minute.
$(2)$ Every $100 \, ml$ of oxygenated blood can deliver around ...$Y$... of $O_2$ to the tissues under normal physiological conditions.
$X-Y$
Medium
View SolutionAfter fast running,a man has a fast heartbeat,a slow pulse,and shallow breathing. In such conditions,he has:
Medium
View SolutionWhich of the following is functional for protection against the environmental abiotic factor of temperature or for thermoregulation of the living body during winter or summer?
Medium
View SolutionRate of breathing in a newborn is about . . . . . . times per minute.
Arrange the given steps of the respiration mechanism in the order they occur in the human body:
$I.$ Breathing or pulmonary ventilation
$II.$ Diffusion of $O_2$ and $CO_2$ between blood and tissues
$III.$ Transport of gases by blood
$IV.$ Utilisation of $O_2$ by cells
$V.$ Diffusion of $O_2$ and $CO_2$ across the alveolar membrane
Choose the correct option.
$I.$ Breathing or pulmonary ventilation
$II.$ Diffusion of $O_2$ and $CO_2$ between blood and tissues
$III.$ Transport of gases by blood
$IV.$ Utilisation of $O_2$ by cells
$V.$ Diffusion of $O_2$ and $CO_2$ across the alveolar membrane
Choose the correct option.
Medium
View SolutionVedclass Products
For Students
Vedclass Test Series
Mock tests in real JEE/NEET style with performance analysis. 5-day free trial.
Start Free TrialFor Teachers
Exam Paper Generator
Generate Set A/B/C/D exam papers from 7.5L+ questions in 2 minutes. 3 chapters free.
Try FreeFor Institutes
Online Exam Module
Live online exams with unlimited students, 360° analytics & white-label branding.
See Demo