PSY 324 Chapter Notes - Chapter 10: Splanchnic Nerves, Vagus Nerve, Lactose Intolerance
17 Apr 2016
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Chapter 10 internal regulation (module 10. 3 hunger) Hunger and satiety are regulated by many factors including taste, stomach distension, the availability of glucose to the cells, and chemicals released by the fat cells. Many brain peptides help regulate feeding and satiety. Most mammals lose the intestinal enzyme lactase and further milk consumption causes cramps/gas/diarrhea. Only some humans are lactose intolerant, most are tolerant as adults due to presence of lactase. Sugar has no significant effect on children"s activity levels, play behaviours, or school performance. Overeating turkey does increase tryptophan levels/melatonin, but overeating actually makes you sleepy. True: many fish like salmon contain oils that are helpful for brain functioning memory and reasoning. Sham-feeding everything an animal swallows leaks out of a tube connected to esophagus/stomach. Animals eat/taste/swallow continuously without becoming satiated eating far more than normal. The main signal to end a meal is distension of the stomach it is sufficient to produce satiety (primary signal)
