Cellular Respiration Flashcards Preview

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Flashcards in Cellular Respiration Deck (13)
1

sources of energy in environment

thermal
radiant
electrical
mechanical
chemical
atomic
*****SUN*******

2

direction of energy through ecosystem

producer > consumer > decomposer

3

3 things required for metabolism

1. starting materials- glucose
2. energy in ATP
3. reducing agents- NADH, FADH2

4

catabolic reaction

break large compounds into small
energy levels of reactants higher than products (exergonic)
energy released- some captured in ATP, some lost as heat

*cellular respiration- glucose + O2 = CO2+H2O+ATP

5

anabolic reaction

form larger compounds from smaller
energy levels of products higher than that of reactants (endergonic)
requires energy- uses cellular ATP, sun energy

photosynthesis- CO2+H2O+ATP = glucose + O2

6

4 pathways of aerobic respiration

1. glycolysis
2. Acetyl CoA formation
3. Krebs Cycle
4. Electron Transport System (chemeosmosis)

7

Glycolysis

occurs in cytoplasm
1 Glucose + 2 ATP = 2 pyruvates + 2 net ATP + 2 NADH

8

Acetyl CoA Formation

in matrix of mitochondria
2 pyruvates = 2 CO2 + 2 Acetyl CoA + NADH

9

Krebs cycle

in matrix of mitochondria
2 Acetyl CoA + 4 CO2 + 2 ATP+ 6 NADH + 2 FADH2

10

ETC and Chemiosmosis

occurs on inner mitochondrian membrane
10 NADH + 2 FADH2 = 34 ATP

11

chemiosmosis

1. electrons passed along series of membrane protein carriers to oxygen- the final electron acceptor, forms water
2. proton gradient established across membrane, high outside and low inside- returned to inside through ATP synthetase enzyme

12

Anaerobic respiration

fermentation
O2 not required
does not produce much ATP
uses glycolysis only

13

2 major fermentation pathways

alcohol fermentaion (ethanol)
lactic acid fermentation (lactic acid)