Cellular Respiration - Bio 8

Define respiration

Define respiration

use potential energy from food (glucose) and oxygen to synthesize ATP (energy).

Cellular Respiration Equation

C6H12O6 + O2  CO2 + H20 + ATP

Reactants

Glucose (sugar from food)

Oxygen

Products

Carbon dioxide Water ATP

combustion

making heat energy by burning fuels in one step

aerobic respiration

making ATP energy (& some heat) by burning fuels in many small steps

What do we need energy for?

• synthesis (building for growth) reproduction

• active transport

• movement

• temperature control (making heat)

Where do we get energy?

Energy is stored in organic molecules

• carbohydrates, fats, proteins

What does ATP stand for?

Adenosine TriPhosphate

Where does cellular respiration occur?

In mitochondria

Does cellular respiration require oxygen?

no

What does cellular respiration require to make ATP?

• Mitochondria

• Food

• Helpers (such as oxygen or enzymes)

Steps of Cellular Respiration

1. Glycolysis

2. Krebs Cycle

3. Electron Transport Chain

What does glycolysis do?

splits glucose to make ATP

Where does glycolysis occur?

In Cytosol (Cytoplasm)

Glycolysis reactants

• 2 ATP

• rearrange resulting compounds

Glycolysis products

• 4 ATP

• pyruvate

Where does Krebs Cycle occur?

In the matrix

What is cellular respiration called when it requires oxygen?

aerobic

What is cellular respiration called when it does not requires oxygen?

anaerobic

Where in the cell does aerobic cellular respiration occur?

Mitochondria

Where in the cell does anaerobic cellular respiration occur?

Cytoplasm

What organisms does cellular respiration occur in?

animals, plants, and fungi, and also in algae and other protists.

What molecule is used by every creature on the planet?

glucose