Why does the body sometimes jerk suddenly when falling asleep?

Brain misinterprets relaxation as falling

How do the ossicles in the ear amplify sound vibrations?

Using a lever-like mechanical advantage

To maintain a cooler temperature

To join facial pieces during development

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Question 1 of 3 Easy

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1 Easy

What is the longest and strongest bone in the human body?

Answer: femur
2 Medium

Why does the body sometimes jerk suddenly when falling asleep?

Answer: Brain misinterprets relaxation as falling
3 Hard

How do the ossicles in the ear amplify sound vibrations?

Answer: Using a lever-like mechanical advantage
4 Easy

What is the colored part of the human eye called?

Answer: iris
5 Medium

Why are human testicles located in the scrotum outside the body?

Answer: To maintain a cooler temperature
6 Hard

Why does the human face have a philtrum above the upper lip?

Answer: To join facial pieces during development