NROC61H3 Chapter Notes -Ghrelin, Cerebral Cortex, Mechanoreceptor
23 Jan 2013
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Document Summary
Homeostasis: the process of maintaining the internal environment of the body in a narrow physiological range. The hypothalamus plays a key role in the regulation of body temperature, fluid balance, and energy balance. Motivated behaviours to correct a situation (such as shivering when cold) are incited by the lateral hypothalamus. The condition in which blood is filled with nutrients, such as after a meal, is called the prandial state. The energy is stored as either glycogen (liver and skeletal muscle) or triglycerides (adipose/fat tissue) The fasting phase between meals is called the postabsorptive phase, in which the glycogen and triglycerides are broken down. Glucose is used by all cells, but triglycerides are not used by neurons. If the intake of energy exceeds the usage, the amount of body fat, or adiposity, increases, resulting in obesity. Neurons found in the periventricular zone (from ch. Neurons that incite feeding behaviour are found in the lateral hypothalamus (i. e. feeding is a motivated behaviour)
