NUTR 3210 Lecture Notes - Lecture 1: Myocyte, Adipose Tissue, Blood Sugar
Document Summary
Fatty acids (mainly derived from adipose tissue) predominant source of energy for slow twitch muscle: fast twitch (sprinting,lifting): these are used for short duration, quick contraction. Blood glucose and muscle glycogen provide energy may lead to lactate accumulation (o2 cant be supplied fast enough) Glucose is to be stored as tag: during catabolism, epinephrine stimulates hormone sensitive lipase (hsl) releases fatty acids from triglyceride breakdown into circulation. So the rbc"s are totally depe(cid:374)de(cid:374)t o(cid:374) glu(cid:272)ose as a fuel. Metabolism in different tissues: brain: the brain has high energy needs to support continuous electrical activity, uses primarily glucose as fuel (uptake not regulated by insulin) In the fed state, the brain will catabolize only small amounts of fatty acids, but following adaption to starvation, the brain will eventually rely on ketone bodies (derived from fatty acids) for about. Insulin is a anabolic hormone: secretin of insulin is stimulated by high blood glucose levels.
