Lecture 31 Unit 5 Flashcards
what does the absorptive state represent
the time after a meal when nutrients enter the blood and need to be stored
what is the hepatic portal system used for
absorption of glucose and amino acids
what are lacteals used for
absorption of dietary fats
how are dietary fats transported
as lipoproteins through the lymphatic system before reaching general circulation
where does storage of excess fuels occur
in hepatocytes, adipocytes, skeletal muscle
what is most glucose entering liver cells converted to
glycogen or fatty acids
where are dietary lipids stored
in adipose tissue
what happens to amino acids in order to enter the Krebs cycle
they are deaminated or converted to glucose or fatty acids
what are amino acids not taken up by hepatocytes used by
other cells for synthesis of proteins
how long does it take for all nutrients to be absorbed
4 hours
what is normal blood glucose level
70-110 mg/dL
what happens in the postabsorptive state
- glucose enters blood from liver
- alternative fuel sources are used
what are the processes that occur when glucose enters blood from liver
- glycogenolysis
- gluconeogensis
what happens in gluconeogenesis
- glycerol from adipose tissue
- amino acids and lactic acid from muscle
what are alternative fuel sources in postabsorptive state
- fatty acids from adipose fed into Krebs as acetyl coA for most cells
- oxidation of ketone bodies by heart and kidney
