Asked by Samantha Saldana on Jul 15, 2024
Verified
While attending a lecture, Lea starts yawning and fights hard to stay awake.She reclines in her chair and within minutes she falls asleep with her head jerking upward at short intervals.Lea is in
A) stage 1 sleep.
B) stage 2 sleep.
C) stage 3 sleep.
D) stage 4 sleep.
Stage 1 Sleep
A light sleep phase in the sleep cycle characterized by slow eye movements and reduced muscle activity; it is the transition phase from wakefulness to sleep.
Jerking Upward
A sudden, quick movement upward, often reflexive or involuntary.
- Explain the sequence of sleep cycles and the features that differentiate each stage.
Verified Answer
LN
Lindy Nichols-RomeroJul 18, 2024
Final Answer :
A
Explanation :
Lea's reclining and short jerking movements suggest that she has entered the initial stage of sleep, called stage 1. This stage is characterized by the onset of drowsiness and a decrease in muscle activity, which can cause the body to jerk slightly. Stage 1 tends to last only a few minutes and is easy to be awakened from.
Learning Objectives
- Explain the sequence of sleep cycles and the features that differentiate each stage.