CAS BI 315 Chapter Notes - Chapter 16.1; 16.4; 16.6: Basal Metabolic Rate, Homeothermy, Lipolysis
11 Feb 2018
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Absorptive state ingested nutrients enter blood through gi stored as fat in adipose tissue. Glucose is used for energy; stored in liver/skeletal muscle as glycogen; converted to and. Cholesterol taken up by cells from bloodstream (used for membrane/hormones); can be. Amino acids broken down into intermediate as keto acids (removed amino group) synthesized or metabolized in liver used in citric acid cycle & fat production in liver. Postabsorptive state gi is empty of nutrients body"s stores supply energy. Glycogenolysis hydrolysis of glycogen glucose 6-phosphate liver glucose bloodstream. Occurs in skeletal cells cannot convert to glucose fermentation lactate liver glucose. Lipolysis catabolism of triglycerides glycerol & fatty acids. Proteins can be a source of glucose as well via gluconeogenesis. Glucose sparing increase of fat utilization to save glucose for more essential parts of body. Internal energy liberated ( e) can be transformed to heat (h) or used to perform work (w) ~60% released as heat, rest used for work.
