Ch 10.1 LESSON Respiration Overview

Cellular Respiration: An Overview

Learning Objectives

▪ Identify how organisms get energy.
▪ Explain how cellular respiration works.
▪ Explain the relationship between photosynthesis and

cellular respiration.

Cellular Respiration

Cellular respiration is a process of energy conversion that
releases energy from food in the presence of oxygen.

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Cellular respiration is a process of energy conversion that
releases ​

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from food in the presence of ​

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.

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energy

oxygen

glucose

carbon dioxide

Cellular Respiration

The chemical summary of cellular respiration is:

What does the equation look like expressed in symbols?

Multiple Choice

What is one of the reactants (raw materials) going into cellular respiration?

• Energy

• Sugar (Glucose)

• Carbon dioxide

• Water

Multiple Choice

Which of the following chemical equations properly demonstrates Cellular Respiration? Choose the BEST answer.

• C6H12O6 + O2 --> H2O + CO2

• H2O + CO2 -> C6H12O6 + O2

• C6H12O6 + 6 O2 -> 6 H2O + 6 CO2

• 6 H2O + 6 CO2 -> C6H12O6 + 6 O2

Stages of Cellular Respiration

• Glycolysis

• Krebs cycle

• Electron transport

Reorder

The correct order of stages of cellular respiration is

• Glycolysis

• Krebs cycle

• electron transport

1

2

3

• 1
• 2
• 3

Multiple Choice

What do all three stages of respiration have in common?

(glycolysis, Krebs cycle, electron transport)

• They all use oxygen

• They all produce water

• They all use glucose

• They all produce energy

Stage 1: Glycolysis

Glucose first enters a chemical pathway known as glycolysis.
A small amount of energy is captured to produce ATP.

Multiple Select

What happens during glycolysis?

Choose TWO

• glucose is broken into two

• carbon dioxide is released

• oxygen is used

• water is released

• energy is released

Stage 2: Krebs Cycle

In the second stage of cellular respiration a little more
energy is converted.

Multiple Select

What happens during Krebs cycle?

Choose TWO

• glucose is broken into two

• carbon dioxide is released

• oxygen is used

• water is released

• energy is released

Stage 3: Electron Transport

The final stage requires reactants from the other two stages
of the process.

Multiple Select

What happens during electron transport?

Choose THREE

• glucose is broken into two

• carbon dioxide is released

• oxygen is used

• water is released

• energy is released

Photosynthesis and cellular
respiration can be thought
of as opposite processes.

Photosynthesis and Cellular Respiration

Labelling

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6O₂

6CO₂

photosynthesis

respiration