NUSCTX 103 Lecture Notes - Lecture 6: Lean Body Mass, Basal Metabolic Rate, Ketone Bodies

• School: Berkeley
• Department: Nutritional Sciences And Toxicology
• Course: NUSCTX 103
• Professor: Olzmann

Document Summary

Lecture a (professor sul): energy balance and nutrients involved in energy extraction: describe the main factors that contribute to energy expenditure. *basal metabolic rate (usually measure restingmr): ideal, minimal enz activity, doing nothing (baseline to stay alive) Thermic effect of food: increase in metabolic rate (from bmr) to digest/process/absorb/store food (+ produce some heat) Tef = energy used to digest, absorb and metabolize food. Physical activity (daily life & exercise): increase in metabolic rate when moving. Thermoregulation (thermogenesis): generation of heat to keep body at normal body temp despite environment (includes shivering/movement+warmth & non-shivering/produce heat) Having more increases bmr: lean body mass, hormone levels (thyroid, catecholamines-[nor]epinephrine, glucocortisol, etc. ), body surface area, abnormal body temp (ie- fever), pregnancy, caffeine & tobacco use // males (more lean body mass) Having more decreases bmr: age (older = decrease in lean body mass) // females: what can be considered as metabolic fuel and what are the stored fuel .