Stage 2 —Your body remains in a light sleeping state as your breathing and heart rate slow even more. Muscles also relax more as your body temperature drops and your eyes stop moving. Stage 3 —In stage 3 of non-REM sleep, your breathing and heartbeat sink to their lowest rates. This...
Experiments with sleeping rats found that cells in the animals' brains fire in a distinctive pat tern (3)___ the pattern that occurs when they are (4)___ and trying to learn their way around a maze. Based on the results, the researchers concluded the rats were dreaming about the maze,...
67. While sleeping, some water animals tend to keep half awake in order to ___. A.alert themselves to the approaching enemy B.emerge from water now and then to breathe C.be sensitive to the ever-changing environment D.avoid being swept away by rapid currents 68.By...
That night everyone made do. We pitched camp at an improvised spot a little ways down from the wreck. Those without sleeping bags slept in blankets. The next morning, after the river dropped, the guides got out to the rock and cut the rest of the rig free. They stashed the remains i...