Content protected from screenshots
GKFix.in
General Knowledge
Categories
Concept Builder Quiz
About Us
Start Quiz
Home
My Profile
General Knowledge
Categories
Concept Builder
Start Quiz
Logout
GKFix MCQ Question
Test your knowledge and learn something new
Home
Human Physiology
Question #19973
Back to Home
View All Human Physiology Questions
31 Views
Question
Why do we yawn when sleepy or tired?
A. To show tiredness
B. To stretch facial muscles
C. To communicate
D. To increase oxygen intake
Check Answer
Share on Twitter
Share on Facebook
Copy Link
Related Questions
What is the main function of the bronchioles in the respiratory system?
22
Which structure is responsible for warming and moistening incoming air?
20
Where are chemoreceptors located that detect changes in CO₂ and H⁺ levels?
20