During Which Stage of Sleep Are the Major Postural Muscles

question 45

Multiple Choice

During which stage of sleep are the major postural muscles most relaxed?

• A) stage 2
• B) stage 3
• C) stage 4
• D) REM sleep

---

Definitions:

Oxygen and Nutrients

Essential components for the survival of cells and organisms, providing energy and maintaining basic functions.

Placenta

An organ that develops in the uterus during pregnancy, facilitating the exchange of nutrients, blood, and waste products between mother and fetus.

Fetus

The developmental stage of a human being in utero from the end of the eighth week after conception until birth.

Miscarriages

The spontaneous loss of a pregnancy before the fetus can survive outside the uterus, typically before 20 weeks of gestation.