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.
Answer:
9.9% of men have at least some attraction for the same-gender (4.2% exclusively) Among women, this was 10.9% (1.5% exclusively), of which a large group reported mainly heterosexual attraction.
Ancient Egyptians were really advanced for their time. Archaeologists have found many records showing their knowledge on the human body. They knew a lot about the anatomy of the heart, liver, and brain from their practice of mummification. They also found records of natural and herbal remedies. Records of other studies such as dentistry, mental illness studies, and family planning methods such as birth control were also found.
