Food composition influences metabolism, heart rate and organ growth during digestion in Python regius
| Autor: | Sanne Enok, Johannes Overgaard, Tobias Wang, Poul Secher Henriksen |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
medicine.medical_specialty
Physiology Carbonates Blood Pressure Biology Biochemistry Oxygen Consumption Heart Rate Internal medicine Heart rate medicine Animals Secretion Molecular Biology Meal Organ Size Metabolism Postprandial Period Lipids Small intestine Boidae Glucose Endocrinology Postprandial medicine.anatomical_structure Gastric acid Animal Nutritional Physiological Phenomena Dietary Proteins Blood Gas Analysis Specific dynamic action Glycogen |
| Zdroj: | Henriksen, P S, Lauridsen, S E, Overgaard, J & Wang, T 2015, ' Food composition influences metabolism, heart rate and organ growth during digestion in Python regius ', Comparative Biochemistry and Physiology-Part A: Molecular & Integrative Physiology, vol. 183, pp. 36-44 . https://doi.org/10.1016/j.cbpa.2014.12.031 |
| ISSN: | 1095-6433 |
| DOI: | 10.1016/j.cbpa.2014.12.031 |
| Popis: | Digestion in pythons is associated with a large increase in oxygen consumption (SDA), increased cardiac output and growth in visceral organs assisting in digestion. The processes leading to the large postprandial rise in metabolism in snakes is subject to opposing views. Gastric work, protein synthesis and organ growth have each been speculated to be major contributors to the SDA. To investigate the role of food composition on SDA, heart rate (HR) and organ growth, 48 ball pythons (Python regius) were fed meals of either fat, glucose, protein or protein combined with carbonate. Our study shows that protein, in the absence or presence of carbonate causes a large SDA response, while glucose caused a significantly smaller SDA response and digestion of fat failed to affect metabolism. Addition of carbonate to the diet to stimulate gastric acid secretion did not increase the SDA response. These results support protein synthesis as a major contributor to the SDA response and show that increased gastric acid secretion occurs at a low metabolic cost. The increase in metabolism was supported by tachycardia caused by altered autonomic regulation as well as an increased non-adrenergic, non-cholinergic (NANC) tone in response to all diets, except for the lipid meal. Organ growth only occurred in the small intestine and liver in snakes fed on a high protein diet. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect