Answer:
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<h3>What is flexibility? </h3>
- <em>Flexibility is the ability to move muscles and joints through a full normal range of motion.</em>
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<h3>Why is it important?</h3>
- <em>Flexibility is important because it Helps maintain appropriate muscle length and avoid muscle shortening.</em>
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<h3><em>❀</em><em>Thank</em><em> </em><em>you</em><em>~</em><em>❀</em></h3>
<em> </em><em> </em><em>✧༺♥༻✧</em>
Answer:
True.
Explanation:
Stage 1 of NREM sleep is characterized by a low amplitude EEG, mixed frequency between range a and s (2 to 7Hz). EMG activity is usually higher than at other stages of sleep, but amplitude can vary widely. Stage 2 of NREM sleep is recognized by background activity and episodes of sleep spindles and K-complexes. Sleep spindles are short (12 to 14 Hz) waves that increase and decrease in amplitude to produce a spindle characteristic. Stage 3 NREM sleep is classified when slow waves or d waves (£ 2Hz) and high amplitude greater than 75mV (measured from lowest to highest wave - peak to peak) appear at 20 to 50% of the time of the day. record. Stage 4 NREM sleep is similar for EEG, EMG, and EOG from the previous stage; however, stage 4 is characterized by the presence of d waves in more than 50% of the time.
Accordingly, we can conclude that going through the NREM stages (1 to 4), the frequency of EEG waves decreases but their amplitude increases.
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