How Many Stages of Sleep Are There in Human Beings

question 84

Multiple Choice

How many stages of sleep are there in human beings?

• A)3
• B)4
• C)5
• D)6

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Definitions:

Butterfly collection device

A specialized apparatus or tool designed for capturing and holding butterflies for scientific study or hobby.

Pressure

The force exerted by an object against a surface or the force exerted within fluids such as blood pressure in the arteries.

Needle

A slender, pointed instrument typically used for piercing or stitching materials or for medical injections and taking fluid samples.

Arm

A limb extending from the shoulder to the hand, comprising the upper arm, elbow, forearm, and wrist.