In which of the following tissues is glucose the major fuel in prolonged fasting? 1-kidney 2-liver 3-red blood cells 4-brain 5-muscles
crista Forum Guru
Topics: 121 Posts: 408
04/04/04 - 09:32 PM
#2
RBC
Colombia Forum Guru
Topics: 85 Posts: 438
04/04/04 - 10:03 PM
#3
yes
usmle prep Forum Senior
Topics: 21 Posts: 100
04/04/04 - 10:47 PM
#4
what fuel does brain uses in prolonged fasting??
asmi Forum Hero
Topics: 1043 Posts: 4,609
04/04/04 - 11:24 PM
#5
RBC's and exercizing skeletal muscles use anaerobic glycolysis...
in states of prolonged fasting brain can use ketone bodies .
usmle prep Forum Senior
Topics: 21 Posts: 100
04/04/04 - 11:45 PM
#6
no itsonly the RBCs which uses glucose anaerobically for all their energy needs,under all conditions because they dont have mitochondria. brain derive energy from oxidising glucose to CO2 & water in well fed state &in prolonged fasting 2/3 energy comes from ketones & rest from glucose. what is the preferred fuel for cardiac myocytes in well fed & fasting state??
asmi Forum Hero
Topics: 1043 Posts: 4,609
04/05/04 - 12:12 AM
#7
yep 2/3 of fuel comes from ketone bodies and rest from glucose for brain.
:idea: for cardiac muscle : behaves like skeletal muscle in terms of fuel use. well fed -->glucose and FA after brief period of fasting--->FA after prolonged fast--->ketone bodies .
usmle prep Forum Senior
Topics: 21 Posts: 100
04/05/04 - 11:39 PM
#8
i am sorry Asmi ,but u are partially correct... cardiac muscles behaves like SKELETAL MUSCLES WHICH ARE IN EXTENDED PERIOD OF EXERCISE,so its beta oxidation of FAs. & in prolonged fasting ketones are also used. ONLY DURIN FETAL LIFE THEY USE GLUCOSE AS AN ENERGY SOURCE.
asmi Forum Hero
Topics: 1043 Posts: 4,609
04/05/04 - 11:48 PM
#9
Do you mean that cardiac muscle don't use glucose at all in adult life..?
Idiopathic Forum Guru
Topics: 19 Posts: 641
04/06/04 - 12:11 AM
#10
"asmi" wrote: Do you mean that cardiac muscle don't use glucose at all in adult life..?
