PSY 100 1st Edition Lecture 10 Outline of Last Lecture XI. The Nervous System: Guest LectureA. CNS versus PNSB. More on the brainOutline of Current LectureXII. Review of NeuroscienceXIII. SleepCurrent LectureXII. Review of NeurosciencePractice for Exam 11. Q: Which part of the neuron receives the message?A: DendritesNote: chemicals go through the synapse2. Q: Which system is responsible for the “fight or flight” response?A: The sympathetic nervous systemNote: The somatic nervous system is voluntary muscle movement (walking etc.) Sympathetic and parasympathetic nervous systems cannot work at once.3. Q: Which gland is the master of the endocrine system?A: Pituitary glad4. Q: What is caused by strong stimulus (falling, hitting your elbow etc.)?A: More neurons fireNote: neuron speed and intensity do not change5. Q: After everything has fired, what happens to all the dopamine in your system?A: The dopamine is reabsorbed by terminal branches.6. Q: Which system is most at work when you get worked up and go into a rage?A: Sympathetic nervous system.XIII. SleepDuring sleep your brain is active.There are states in between consciousness and unconsciousness. You cannot learn to adapt to function on less sleep that your body needs to function. You cannot make up for missed sleep and people need different amounts of sleep.These notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.Resting in bed with your eyes closed is not a replacement for sleep but is better than not sleeping.The human body does not adjust to night shift work well.If you go through a whole sleep cycle (Stage 1, Stage 2, Stage 3, Stage 4, REM sleep) you will dream, dreams are just not always remembered.REM= rapid eye movementHomeostatic pressure: larger time spent awake, more sleep we need. Pressure builds as you need more sleep.Circadian rhythm: set by light, patterns of feeling alert or drowsyWe do not know why we sleep but we know sleep is needed because we are vulnerable when we sleep, and if we could have evolved away from it we would have.Sleep theories:1. Sleep protects: when predators loomed at night sleep kept our ancestors out of harms way2. Sleep recuperates: helps restore and repair brain tissue, brain changes during sleep3. Sleep aids memory: restores and rebuilds fading memories4. Sleep and growth: pituitary glad releases growth hormone when asleep, sleep time also lengthens during times of maturation (such as adolescence) while older people in general do not need as much sleep5. Sleep and creativity: dreams allow us insight and to virtually practice real
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