Answer to Question 1
Answer: The pons is responsible for inhibiting the release of neurotransmitters necessary for large-scale muscle movement; it is a protective mechanism that prevents the sleeper from physically acting out dreams. Although body movement is reduced, respiration, auditory nerves, and eye muscles continue to function.
Answer to Question 2
Answer: Stage 1: falling asleep; Stage 2: light sleep; Stage 3: beginning of deep sleep; Stage 4; deep sleep; Stage 5: dreaming occurs (REM sleep only present in Stage 5)
Brain Cells
Laparoscopy. A lighted endoscope specialized for insertion into the abdomen, called a laparoscope, i
Filter in the vena cava prevents an embolus from traveling to the heart, lungs, or brain; A, Greenfi
neck, head and brain
Your Brain Controls Hunger and Satiation
Brain Stem and Cerebellum