Biology Review - Biology Review*Chapter for muscle...

Biology Review
**Chapter for muscle contraction (1066-1074) Ch. 49
Exam 2: People in Action
Cell Respiration  Muscle Contraction  Regulation of O
2
Supply to Tissues (muscles)
Cell Respiration
-glucose  glycolysis  pyruvate  (no O
2
) Anaerobic step
 (O
2
) Into mitochondrion  thru membranes into matrix  Kreb’s cycle (Acetyl
CoA  ATP, NADH, FADH
2
)  Electron Transport Chain (inner membrane; makes
much more ATP when oxidative phosphorylation occurs)  gives off CO
2
and H
2
O
-# molecules in each step (ATP, NADH, FADH
2
), # molecules produced by 1 glucose
Muscle Contraction
-mechanical work (transport work/chemical work)
-**explain how a muscle contracts (i.e. Ca cycle)
-know the subunits (i.e. troponin, tropomyosin etc)
-how they generate a whole muscle contraction from one twitch
-know organismal level to molecular level (i.e. whole muscle fiber to single sarcomere,
and part names)
Regulation of O
2
to Tissues
-PFK molecule, ATP:ADP ratios, phosphocreatine
-model for gas exchange (see paint pic)
-partial pressure M