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EXPH 386 Exam 1 Questions and Correct Answers
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EXPH 386 Exam 1 Questions and Correct Answers
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EXPH 386 Exam 1what is the one purpose of the energy release from breakdown of food? - Answer-to phosphorylate
ADP and form ATP
what is the primary function of carbohydrates? - Answer-supply energy for cellular work
carbohydrates are the only nutrient whose energy can be stored to do what - Answer-generate ATP
anaerobically (important during heavy or intense exercise)
will you ever see the body's energy needs at 0 - Answer-no!
during light to moderate exercise carbs supply what amount of the body's energy needs - Answer-1/3
what must occur so that fat nutrients can be used for energy - Answer-a continous breakdown of
carbohydrates
with the breakdown of each glucose molecule in the muscle cell how many kcals of energy are gained?
how many moles of ATP are generated? - Answer-263; 36
,what are the two stages for glucose degradation in the body? - Answer-anaerobic (fast)
aerobic (slow)
what processes are anaerobic? - Answer--glycolysis
-glycogenesis
what is glycolysis - Answer-when a glucose molecule enters a cell to be used for energy it undergoes a
series of chemical reactions
what is glycogenolysis - Answer-when the series of reactions starts with stored glycogen
-this is the breakdown of glycogen into glucose for energy
what is glycogen breakdown regulated by - Answer-phosphorylase
phosphorylase is influenced by what - Answer-epinephrine
what happens to epinephrine during physical activity and exercise - Answer-goes up
what else is important during glycogen breakdown - Answer-release of Ca+ and phosphate ions
what is glycogen formation influenced by after eating a meal - Answer-glycogen synthase
where does glycolysis occur - Answer-cytoplasm
when does glycolysis occur - Answer-anaerobic breakdown of glucose
, what is the storage form of glucose - Answer-glycogen
when does phosphorylase start - Answer-during the inactive stage of exercise
what is required in step 1 of glycolysis - Answer-ATP to break down glucose into glucose-6-phosphate
is step one of glycolysis endergonic or exergonic - Answer-endergonic because energy must be added
is ATP required in step 3 of glycolysis - Answer-yes for the breakdown of fructose 6-phosphate into
fructose, 1,6 diphosphate
what enzyme is required in step 3 in glycolysis - Answer-phosphofructokinase
what may happen with phosphofructokinase - Answer-may place a limit on glycolysis during all-out
exercise
-weak link*
what type of fibers contain a large quantity of PFK - Answer-fast twitch muscle fibers
in step 5 of glycolysis, fructose 1,6 diphosphate is a what type of molecule and is broken into what -
Answer-6-carbon molecule which is broken down into two 3-carbon molecules
how many molecules are in the end of step 5 glycolysis - Answer-two 3-phosphoglyceraldehyde
molecules
how many times does step 7 and 10 of glycolysis occur - Answer-twice
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