PSY 2701 Lecture Notes - Lecture 10: Ventromedial Nucleus Of The Hypothalamus, Solitary Tract, Vagus Nerve

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Breaks down food for energy utilization storage and nutrient absorption: 2 pancreatic hormones: Insulin promotes glucose uptake into cells; promotes conversion of glucose to glycogen a more storage friendly carbohydrate: glycagon increases blood levels of glucose; mediates breakdown of glycogen back to glucose. Without insulin, cells in body (except in brain) are not able to bring glucose into cells. Digestive system provides for energy intake: every step along the way plays an important role in breaking down food. 2 groups of cell in arcuate nucleus control of eating: nyp/agrp neurons have appetite stimulating effects, inhibit pomc/cart cells, activate paraventricular hypothalamus, activate lh, pomc/cart neurons have appetite suppressing effects, inhibit npy/agrp neurons, inhibit lh. Other effector for eating: paraventricular hypothalamus (pvh: activating pvh on its own stimulates appetite: Pvh is also a control center of hormones by projecting to pituitary gland and activating hormonal systems to alter metabolism.

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