9.1 Cellular Respiration Overview

9.1 Cellular Respiration Overview

Poll

How confident are you in the basic understanding of cellular respiration?

• I am a master because I read the section and understood it.

• I know a little bit because I did read the section but didn't understand it.

• I know very little because I didn't read the section but played the Quizizz.

• What are we talking about?

Key Idea: Where do organisms get energy?

Chemical energy and food

Organisms get the energy they need from food

​Energy stored in food is expressed in units of calories

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1 calories = amount of energy needed to raise 1 gram of water 1 ^oC​

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Cells break down food gradually, capturing little bits of energy at key steps​

Multiple Choice

50 calories is enough energy to raise ____ grams of water ____ ^oC

• 25, 25

• 50, 50

• 100, 50

• 1, 1

Key Idea: What is cellular respiration?

Cellular Respiration

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

6O₂ + C₆H₁₂O₆ ---> 6CO₂ + 6H₂O + energy

oxygen + glucose ---> carbon dioxide + water + energy​

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3 main steps:

Glycolysis, Krebs Cycle, and Electron Transport Chain​

Oxygen and Energy

2/3 of Cellular Respiration steps require oxygen

Aerobic - steps of cellular respiration that require oxygen

The Krebs Cycle and Electron Transport Chain

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Anaerobic - step of cellular respiration that do not rely on oxygen

Glycolysis​

Some text here about the topic of discussion

Open Ended

What is the relationship between photosynthesis and cellular respiration?