Cell Respiration Flashcards Preview

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Flashcards in Cell Respiration Deck (11):
1

Cell Respiration

The chemical breakdown of sugar in cells, with the use of enzymes, to release energy

2

ATP

Adenosine triphosphate
High-energy molecule that stores energy for immediate use in the cell

3

Anaerobic respiration

A process that can occur in the absence of oxygen, consists of glycolysis + either alcohol fermentation or lactic acid fermentation

4

Glycolysis

One molecule of glucose breaks apart into 2 molecules of pyruvate, occurs in cytoplasm

5

Alcohol fermentation

Process by which cells convert pyruvic acid/pyruvate from glycolysis into ethyl alcohol & carbon dioxide in the absence of oxygen

6

Lactic Acid Fermentation

Occurs during tough exercise when body can't keep up with increased demand for oxygen by skeletal muscles
Pyruvic acid converts to lactic acid, builds up in muscles causing burning & fatigue

7

Aerobic Respiration

3 processes; glycolysis, Krebs cycle, & electron transport chain
Occurs in mitochondria
Require energy

8

Krebs cycle

Also citric acid cycle
First stage of aerobic phase, occurs in inner matrix
Produce: small amount of ATP, CO2, NADH & FADH2

9

Electron transport chain

Within cristae membrane of mitochondria
Consists of a series of molecules that provides energy to phosphorylate ADP into ATP during chemiosmosis (oxidative phosphorylation)

10

Chemiosmosis

How ATP is produced
Protons flow through ATP synthetase channels & transfer energy to molecules of ATP

11

Oxidation

Loss of electrons