KINS 1224 Chapter Notes - Chapter 26: Coagulation, Hemicellulose, Chylomicron
Document Summary
Weight is determined by ones energy balance if energy intake and output are equal body weight is table. We gain weight if intake excess output and lose weight if output exceeds intake. 30-50% of variation weight in humans is due to heredity the rest to environmental factors like eating and exercise habits. The body has a growing list of peptide hormones and regulatory pathways that control short and long term appetite and body weight. Some of the hormones have been called gut-brain peptides bc they act as chemical signals from the gastrointestinal tract to the brain. The following 3 peptides work over periods of minutes to hours making one feel hungry and begin eating and feeling satiated and end a meal. Ghrelin- secreted by parietal cells in the gastric fundus when the stomach is empty. Process sensation of hunger and stimulates the hypothalamus to secrete growth hormone releasing hormone priming the body to take advantage of nutrients to be absorbed.
