2/6/15
Based on the BTB /cell respiration lab, what
are TWO components of the cellular
respiration equation. HINT: Think- what went
in vs. out (reactant vs. product)
Date:
2/6/15
Topic:
Cellular Respiration
Page # ___
Date:
2/6/15
Topic:
Cellular Respiration
Page # ___
Today in Room 315…
ADMIT SLIP: In journal… how does our body access energy
in food?
HW: Complete Glycolysis Review Worksheet
CONTENT OBJ: SW explore the first stage of cellular
respiration using online animations
LANG. OBJ: SW write notes in their journals and then
complete their Glycolysis Web Quest
ANNOUNCEMENTS: DO NOT LOSE YOUR SHEETS!
AGENDA:
Glycolysis class notes
Glycolysis Web Quest
EXIT SLIP: All computers plugged in and away
Cellular Respiration*
The process that helps our cells ACCESS the
energy in food
More scientifically… “The process in which a cell
breaks down sugar or other organic compounds
to release energy used for cellular work.”
ATP!
ATP*
A = adenosine
T = tri
P = phosphate
Energy storage
molecule in all
organisms
Cellular Respiration Equation*
6O2 + C6H12O6 --> 6H2O + 6CO2 + energy
Glucose found in food!
• Explanation?
• Also, how many of each molecule are
present?
Cell Resp. has 3 Steps*
1) Glycolysis
2) Krebs Cycle
3) Electron Transport Chain
**Occurs in the cytoplasm of the cell**
Glycolysis*
To start reaction, need
2 ATP
(like needing two
tokens to play an arcade
game)
Glucose (6 carbons,
represented w/ 6 circles)
is broken down into 2
molecules (PGAL)
Glycolysis*
Two PGAL molecules are
then broken down to release
4 ATP molecules and 2 high
energy electron carriers,
known as NADH molecules
PGAL gets broken down to
pyruvate
Glycolysis
End Products*
4 ATP (net 2 ATP- why?)
2 NADH (high energy
electron carriers)
2 pyruvate (3 carbons each)
also known as pyruvic acid
Aerobic vs. Anaerobic*
Aerobic means?
REQUIRES oxygen
Anaerobic means?
Does NOT require oxygen
Certain exercises require oxygen
(ex. running) while some do not
(you breathe before and after
each lift, but not during!)
Pyruvate has 2 pathways*
Aerobic (oxygen available)
Pyruvate molecules head to Kreb’s cycle
Anaerobic (oxygen unavailable)
Pyruvate molecules go through…
Lactic acid fermentation OR
Alcohol fermentation
Lactic Acid Fermentation*
Pyruvate is broken
down into…
lactic acid
(or lactate)
NAD+
Lactic acid is produced
by the muscles (though
this process) when
they are not supplied
enough oxygen, and it causes a burning sensation.
That’s why your muscles burn when you work out!
Alcohol Fermentation*
Pyruvate is broken
down into…
Carbon dioxide
Ethanol
NAD+
These processes…
1) Make bread rise
and sparkling drinks (CO2)
2) Make wine/beer alcoholic
(ethanol)
Glycolysis Web Quest
Over the next few days, we will be learning about all
the stages of cellular respiration
But for today, you are just going to focus on
glycolysis
You are to complete the Glycolysis Web Quest using
two videos posted on the website under today’s date
Make sure to follow all directions, and DON’T LOSE
YOUR SHEET! (You will also need it tonight for HW)
You may go get your computers…
Glycolysis HW
Use the diagram provided to write a one page
description of glycolysis and the two following
pyruvate pathways.
What occurs in each situation, and what is
produced?
Due TOMORROW!!
2/9/15
Date:
2/9/15
Topic:
Cellular Respiration 2
Page # ___
Date:
2/9/15
Topic:
Cellular Respiration 2
Page # ___
Today in Room 315…
ADMIT SLIP: In journal… how does our body access energy
in food?
HW: Complete Glycolysis Review Worksheet
CONTENT OBJ: SW explore the first stage of cellular
respiration using online animations
LANG. OBJ: SW write notes in their journals and then
complete their Glycolysis Web Quest
ANNOUNCEMENTS: DO NOT LOSE YOUR SHEETS!
AGENDA:
Glycolysis class notes
Glycolysis Web Quest
EXIT SLIP: All computers plugged in and away
Two other steps of cell resp?
1) Glycolysis
2) ____________________________
3) ____________________________
After glycolysis…*
And in the PRESENCE of oxygen,
pyruvate goes through
respiration,
Where pyruvate is converted
to Acetyl CoA
2 NADH & 2 CO2 produced
Acetyl CoA required for
Kreb’s cycle
Kreb’s Cycle*
Also knows as the “Citric Acid Cycle”
Takes place in the mitochondria
6 CO2 are released
2 ATP generated
2 FADH2 are generated
8 NADH are generated
ATP Count- where we at??
Glycolysis  2 ATP
Kreb’s Cycle  2 ATP
Total = 4 ATP
But a working muscle recycles over 10 MILLION
ATP every second…
So we need MORE!
Electron Transport Chain*
Goal: To break down
NADH and FADH2
into ATP
ETS creates proton
gradient by pumping
H+ to outer
compartment of
mitochondria
Electron Transport Chain*
H cleaved (taken off) NADH & FADH2  now H atoms
Electrons stripped (taken off) from H atoms 
become H+ (protons)
Use flow of electrons as
energy to pump protons
across inner membrane
and into inter membrane
space
H+
H+
H+
C
e–
NADH
Q
e–
FADH2
FAD
NAD+
NADH
dehydrogenase
e–
2H+ +
cytochrome
bc complex
1
H 2O
2 O2
cytochrome c
oxidase complex
ATP Synthase*
Final step after the electron transport chain (ETC)
Protons now in
intermembrane space are
funneled into ATP synthase
(a protein), which produces
ATP
ETC + ATP Synthase
generates 36 ATP
Other names…*
Production of ATP
using ATP synthase
= “chemiosmosis”
(duchemicals diffuse
across membrane)
ETC + chemiosmosis
= “oxidative
phosphorylation”
(oxidation -> loss of e-,
phosphorylation
-> phosphate groups)
Cellular Respiration Overview*
2 ATP
+
2 ATP
+
36 ATP
= 40 ATP per one molecule glucose!
Aerobic vs. Anaerobic
Energy Yield*
Aerobic respiration produces 38 ATP
(2 from Kreb’s + 36 from ETC)
Anaerobic respiration produces 2 ATP
(only get the 2 ATP from glycolysis)
So aerobic respiration is 19 times more efficient
than aerobic respiration!
(aka oxygen = awesome)
Any questions?? 
Web Quest Continued
You will now watch the remaining segments in
JUST VIDEO 1 and fill out your guided notes
When you are done you will have a full packet of
Cellular Respiration notes! (STUDY STUDY
STUDY!)
Questions? 
If not, go grab computers…
Cellular Respiration HW
Cellular Respiration Review Packet
Whole Packet Due THURSDAY!!