Lect11 EnergyBal - !"#$#!"% What we eat How we...

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: !"#$#!"% What we eat How we use energy% !"#$%&'&%%'()%*+,%!"#$%*-*./'%,0+-%'()%)1*%22% /+3-%4*3/0,% (')*%&'&%'()%*+,%%$&&%*-*./'%,0+-%'()%)1*%22% 5(1*%4*3/0,% costs energy to metabolize food Nonexcercize thermo genesis +,-)'./01*%'23&%%% !6  7*8*-91%(-&% +6  :;()-,%(<%<((9%=(-1);*9% >6  :?+35+>353,'%(<%=*.,+3-%-),.3*-,1% !6  EF%,.+=,&%%% Sensing mech. for •  E+1,.3=%1,.*,=03-/% g lucose •  G3.=)5+B-/%-),.3*-,%=(-,*-,% •  A(.;(-*1&%%E0.*53-H%%GGI% Ghrelin=growls, senses @6  A(4%31%,031%3-<(.;+B(-% ,.+-1;3C*9D% h unger, high before meal, @6  J+-=.*+1&%%%%%F-1)53-% K6  :938(1*%B11)*&%%%%L*8B-%% made in the stomach Leptin tells us we're satisfied Information trasmitted by nervous and hormonal system Sends signals to hypothalamus Signals come from GI tract, pancreas, and a dipose tissue These send signals about eating !% !"#$#!"% M-*./'%,(%;+3-,+3-%53<*%8.(=*11*1% •  7*8*-91%(-&% –  :/*H%%E.(4,0% –  A*3/0,H%N%5*+-%B11)*% –  O+1B-/H%1,+.?+B(-H%;+5-),.3B(-% –  O*?*.% –  A(.;(-*1&%%,0'.(P3-% Leptin is synthesized from Adipose tissue When we lose weight, leptin decreased, "our b ody is losing backup fuel" Energy defificient: people move less Gain weight-> more leptin->more energy, d ecreased energy intake Basal metabolism: energy required to keep us alive, b iggest energy expenditure, Takes more energy to keep lean muscle Fever-body gets hot !6  F-93.*=,%=+5(.3;*,.'&%Q+1+5%R*,+>(53=%S+,*% TQRSU% @6  73.*=,%=+5(.3;*,.'% K6  V,+>5*%31(,(8*%;*+1).*;*-,1% W6  X1*%+-%*Y)+B(-% Indirect: not moving at all, measures oxygen levels Direct: energy in food, put person in a chamber, see how much heat is released (change in temperature) Stable isotope: more common, hydrogen/ oxyegen isotopes Use an equation men have more leaner muscle @% !"#$#!"% Energy Out: 2. Physical Activity •  •  •  •  S)--3-/%!"%;80 % ^+5\3-/%K6$_%;80 ^+5\3-/%@6_%;80% V5**83-/% % % % %Z[$%\=+5#0.]% %K""% %@""% %Z"% M-*./'%=(1,%<(.%93/*1B(-&%% % %+88.(P%!"N%(<%\=+5%*+,*-% O+,&%%%@2KN% G+.>(0'9.+,*1&%%`2ZN% J.(,*3-&%!_2K"N% :5=(0(5&%%@"N% *You would have to run 39 miles at that rate to theoretically lose 3500 kcal = 1 lb fat% Basal=70% 3500kcal = 1lb fat energy deficient, body decreases metabolism eat more, if you lose more weight alcohol=detoxification Energy Out: 4. Adaptive Thermogenesis •  A*+,%8.(9)=B(-H%103?*.3-/% •  MP=*11%0*+,%<.(;%(?*.*+B-/% •  :9+8B(-%,(%,.+);+H%1,.*11% •  aMSb%7FOOMSMcd%<(.%93e*.*-,%8*(85*% MP=*113?*%+;()-,%(<%+938(1*%B11)*%3-%.*5+B(-% ,(%5*+-%>(9'%;+11% !6  A(4%9(%4*%;*+1).*%3,D% @6  ^0+,%=+)1*1%3,D% thermogenesis-how much heat a person puts out excess amounts of adipose tissue losing water if we lose weight really fast, lose glycogen too K% !"#$#!"% QRF% :-,0.(8(;*,.'% Q3(*5*=,.3=+5%F;8*9+-=*% Q(9'%7*-13,'&%4+,*.% %93185+=*;*-,% •  Q(9'%7*-13,'&%%+3.% % % %93185+=*;*-,% •  7f:&%9)+5%*-*./'%f2.+'%% •  •  •  •  QRF%g%%^*3/0,%T\/U#%%hA*3/0,%T;Ui%@% J.(>5*;1&% •  c(%+==()-B-/%<(.%;)1=)5+.3,'% •  1+;*%<(.%;*-%+-9%4(;*-% •  1+;*%<(.%+55%.+=*1% •  ^+31,%?1%A381&%%%c(,%+55%<+,%31%*Y)+5% •  c(%+==()-B-/%<(.%8(8)5+B(-%+/*% decorative fat, visceral fat subject to error measures how much e lectricity G(;8+.31(-%43,0%7f:% %%Q(9%J(9 %.g6[K% %%G+538*.1 %.g6Z$% %%QRF % %.g6Z!% %%F;8*9+-=* %.g6`Z% Q+1+5%;*,+>(531;% d0*.;3=%*e*=,%(<%<((9% d0*.;(/*-*131% G+5(.3;*,.'% E0.*53-% L*8B-% :938(1*%B11)*% QRF% :-,0.(8(;*,.'% Q3(*5*=,.3=+5%F;8*9+-=*% Q(9'%7*-13,'% 7f:% body density by water DXA Dual energy X ray expensive, subject to X ray energy balance is affected by what we eat, b ody size/shape, and what we do. n erves and hormones send signals to the b rain concerning hunger/satiety W% ...
View Full Document

This note was uploaded on 03/29/2011 for the course NUTRISCI 10 taught by Professor Benodelumen during the Spring '10 term at University of California, Berkeley.

Ask a homework question - tutors are online