PSYCH 1XX3 Lecture Notes - Lecture 1: Thalamus, Hydrocephalus, Cholecystokinin
20 Apr 2016
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Document Summary
Seeking out food and drink is a fundamental goal-directed behaviour because your moving body needs regular nourishment to function optimally. During most of the human evolutionary past, food sources were scarce and behaviours were motivated by the constant need to obtain energy and nutrients essential for survival. Feeding behaviours may be motivated by hunger and satiety signals, but are guided to a large extent by the interaction of the senses of taste and smell. Overnight, you have fasted for the longest period of your daily cycle. Many signals and complex interactions between the brain and digestive system that drive your feelings of hunger to consume food and drink and satiety signals which lead you to stop consumption. Animals need to consider more than their current nutritional needs, they also need to store some excess energy for use in times when food is scarce. Whenever possible, long-term energy storage takes place in the form of fat (adipose.
