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22 Cards in this Set
- Front
- Back
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What influence does ΔG have on a biochemical reaction?
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- G is favorable for reaction
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What is the difference between an endergonic vs. exergonic reaction?
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Endergonic means to absorb energy. Its etymology stems from the suffix -ergonic as derived from the Greek root ergon meaning to work, combined with the prefix end- as derived from the Greek root en meaning put into.
Exergonic means to release energy. Its etymology stems from the suffix -ergonic, as derived from the Greek root ergon meaning to work, combined with the Greek prefix ex- meaning out of. Natural flow of disorganization.—downhill. (2nd Law of thermodynamics) |
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What is the role of ATP?
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Energy transport
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What energy pathway dominates during the first: 3-10 sec,60-180 sec, 5 min
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3-10 seconds of exercise, immediate-ATP,CP-Glucolysis
60 –180 seconds Glycolysis >5 minutes? B Oxidation FFA (Mitochondrial) |
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What are 3 ways that the immediate energy sources provide energy?
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ATP, Cp, ADP
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How does glucose enter the cell?
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Glut 4
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Is this influenced with training?
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Yes, more efficient
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What enzyme phosphorylates glucose to transport (?) it into the cell for further metabolism?
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Hexokinase
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How many ATP are produced if lactate is or is not produced?
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2,3(Lactate)
38,39 (not lactate) |
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What conditions would we expect lactate to be produced?
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Anaerobic (no O2 available), oxygen debt
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What substrate does the formation of lactate provide for glycolysis to continue?
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NAD
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What enzyme influences the formation of lactate vs. pyruvate?
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LDH (Latodehydrogenase)
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How does training influence this enzyme?
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Endurance training lowers activity of LDH, shifts it from Skeletal to cardiac muscle type
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What is the rate limiting step (enzyme) of glycolysis?
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PFK (phosphofructokinase)
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What influence does glycogen availability have on the glycolytic pathway?
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More efficient- Makes more ATP due to saved P attachment.
Saved ATP overhead |
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How does pyruvate enter the Krebs cycle?
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As acetyl CoA
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What is formed during this process?
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NADH
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Once in the Kreb’s cycle, how many of the following substrates are produced? A. GTP-
B. NADH- C. FADH- |
A.GTP- I
B. NADH- 3 C. FADH-1 |
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What happens to the NADH and FADH formed in the Kreb’s cycle?
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Sent to ETC
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How many ATP will each yield when oxidized?
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NADH-3 atp
FADH-2 atp GTP -1 atp |
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How many Acetyl CoA, NADH, FADH will a 16 C Fat yield through Beta oxidation?
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8 Acetyl CoA
7 NADH 7 FADH |
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What is the role of protein use during exercise?
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Rebuild tissue
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