Cellular Respiration

1
Cellular Respiration

• The process by which living things release energy
  stored in organic molecules
• Takes Place in 2 major stages
• Glycolysis
• Oxidative Respiration or Fermentation

2
(No Transcript)
3
I. Glycolysis - The splitting of glucose into
2 three Carbon molecules called Pyruvate

• Occurs in cytoplasm
• 4 ATP produced but 2 are used in process
• Does NOT require OXYGEN

4
II. Anaerobic vs Aerobic

• A. Anaerobic (w/o O2)
• Fermentation
• Process by which pyruvate is converted into
  either alcohol and CO2 or lactic acid
• Occurs in cytoplasm
• Only 2 ATP are produced
• NAD?NADH

5
(No Transcript)
6

• The 3 steps of cellular respiration are
• Glycolysis
• The Krebs cycle
• Electron Transport

7
(No Transcript)
8
(No Transcript)
9
(No Transcript)
10

• Each Cell uses between 1-2 billion ATP/min.
• How many ATPs are used each minute by all 100
  trillion cells in the body?
• 1 glucose 686 Cal
• 1 ATP 7 Cal
• How efficient is aerobic respiration?
• 7x36 252 252\686 36
• Automobiles are only 25 efficient in converting
  chemical energy into mechanical energy?

11
(No Transcript)
12
Muscle Fatigue

• Inability of muscle to contract
• Results from a deficit of ATP and/or accumulation
  of lactic acid ? lowers pH

13

• Oxygen Consumption After Exercise
• After exercise, heavy breathing continues and
  oxygen consumption remains above the resting
  level
• Oxygen debt
• This added oxygen is used to restore muscle cells
  to the resting level in three ways
• 1) to convert lactic acid into glycogen
• 2) to synthesize creatine phosphate and ATP
• 3) to replace the oxygen removed from myoglobin

14
Sources of Energy for contraction

• Glycolysis 2 ATP
• Lactic Acid Fermentation 2 ATP
• Aerobic Respiration 36 ATP
• Creatine Phosphate (5x more than ATP)
  (donates Phosphate to ADP ? ATP)
• Exercise Requirements 10 min. taps glycogen for
  glucose
• 10-30 min. Cells use either glucose or fatty
  acids (bloodstream)
• Beyond 30 min. ? fatty acids are primary source

15
http//glencoe.mcgraw-hill.com/sites/0003292010/st
udent_view0/chapter7/animations_and_videos.html
http//vimeo.com/10693405
http//www.bing.com/videos/watch/video/homeboyz-te
ach-cellular-respiration/c882c7d87d7442735123c882c
7d87d7442735123-1513821241783?qcellrespirationa
nimationFROMLKVR5GT1LKVR5FORMLKVR36
http//vcell.ndsu.nodak.edu/animations/etc/movie-f
lash.htm
http//johnkyrk.com/krebs.html
16
(No Transcript)
17
(No Transcript)
18
(No Transcript)