IPHY 2420 Lecture Notes - Lecture 3: Digestion, Sphincter, Hypothalamus
5 Oct 2016
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Document Summary
Groups of atoms bonded in specific configurations. Carbohydrates, proteins, fats and vitamins are large molecules. Break large molecules down to smaller molecules. Absorb the smaller molecules into the cells of the body. These molecules are used to build the cells of the body. : outer layer enclosing each cell of the body. Long lipid tails toward the interior of the membrane. Phosphate heads line the interior and exterior surfaces of the membrane. Cholesterol and proteins are embedded in the membrane. Controls the passage of materials into and out of the cell. Appetite - is the desire to eat that is stimulated by: Hunger - is a physiological drive to that occurs when our body senses that we need food (it"s not just your want, but your need to eat) The hypothalamus region of the brain is the feeding and satiety (if you"re full) center. Nerve receptors in the stomach and small intestine send messages tp.
