Download Syllabus Notes 1-19-06

Syllabus Notes 1-19-06
Whee!
Seriously, I know that this is hard…. It is the
hardest thing we learn. If you believe that I don’t
realize that… please know that I realize this is all
hard… Oh, and Katie the announcement lady
needs a MUTE button.
But first a review: (facts that get
lost in the details…)
• Respiration breaks down food by stripping the
electrons away.
• All of the carbons that were in the food poof away as
carbon dioxide.
• The goal of respiration is to make ATP (body’s
energy).
• Aerobic Respiration: requires oxygen (Krebs and
Electron chain.)
• Anaerobic Respiration: does not require oxygen
(fermentation.)
C.3.4 Explain aerobic respiration including oxidative
decarboxylation of pyruvate, the Krebs cycle, NadH ,
the electron transport chain and the role of oxygen.
• Oxidative decarboxylation of pyruvate: NAD+ takes
electrons away (oxidizes) from pyruvate. One carbon
escapes as CO2 (Decarboxylation.) Called the LINK
reaction between glycolysis and krebs…
• Krebs cycle: where electrons get taken from Acetyl COA (Formerly pyruvate)by NAD+ and FAD+ and more
decarboxylation occurs.
• E.T.Chain: Chemiosmosis occurs! NADH and FADH
formed give electrons to oxygen. The H+’s that are
released go through ATP synthase to make ATP
One turn of the Krebs cycle
yields:
•
•
•
•
2 CO2
3 NADH, H
1 FADH
1 ATP
C.3.5 Explain oxidative phosphorylation.
• Oxydative phosphorylation is making ATP by
chemiosmosis
• Substrate-level phosphorylation is where an
enzyme makes ATP (slow gluing of P to ADP)
– Substrate-level occurs in Krebs and glycolysis…