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Cell Energy The Cell in Action

Cell Energy The Cell in Action. Cell Energy Why do you get hungry? Feeling hungry is your body’s way of telling you that your cells need energy

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Cell Energy All cells need energy to live, grow, and reproduce. Plant cells get their energy from the sun Many animal cells get the energy they need from food

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Page 1: Cell Energy The Cell in Action. Cell Energy  Why do you get hungry?  Feeling hungry is your body’s way of telling you that your cells need energy

Cell Energy

The Cell in Action

Page 2: Cell Energy The Cell in Action. Cell Energy  Why do you get hungry?  Feeling hungry is your body’s way of telling you that your cells need energy

Cell Energy Why do you get hungry?

Feeling hungry is your body’s way of telling you that your cells need energy.

Page 3: Cell Energy The Cell in Action. Cell Energy  Why do you get hungry?  Feeling hungry is your body’s way of telling you that your cells need energy

Cell EnergyAll cells need energy to live, grow, and reproduce.Plant cells get their energy from the sunMany animal cells get the energy they need from food

Page 4: Cell Energy The Cell in Action. Cell Energy  Why do you get hungry?  Feeling hungry is your body’s way of telling you that your cells need energy

From sun to cell As you know, all energy webs and pyramids start with the sun.

Plants capture the energy of the sun and change it into food through a process called photosynthesis

The food that plants make supplies them with energy.

This food also becomes a source of energy for the organisms that eat the plants

Page 5: Cell Energy The Cell in Action. Cell Energy  Why do you get hungry?  Feeling hungry is your body’s way of telling you that your cells need energy

Photosynthesis

Plants have molecules that absorb light energy.

These molecules are called pigments. Pigments give color

The main pigment used in photosynthesis is called chlorophyll. This give plants their green color

Chlorophyll is found in chloroplasts

Page 6: Cell Energy The Cell in Action. Cell Energy  Why do you get hungry?  Feeling hungry is your body’s way of telling you that your cells need energy

PhotosynthesisPlants use the energy captured in the chlorophyll to change the carbon dioxide and water into food.This food is in the form of a simple sugar: glucoseWhen plants make glucose, they convert the sun’s energy into a form of energy that can be stored and used. Photosynthesis also produces oxygen!

Page 7: Cell Energy The Cell in Action. Cell Energy  Why do you get hungry?  Feeling hungry is your body’s way of telling you that your cells need energy

Getting Energy from Foodhttp://www.sumanasinc.com/webcontent/animations/content/cellularrespiration.html

Animal cells have different ways of getting energy from food

The first way, cellular respiration, uses oxygen to break down food

The second way, fermentation, no oxygen is needed

Page 8: Cell Energy The Cell in Action. Cell Energy  Why do you get hungry?  Feeling hungry is your body’s way of telling you that your cells need energy

Cellular Respiration is not breathing!!! The word “respiration” means “breathing”

But cellular respiration is different from breathing!

Breathing supplies the oxygen needed for cellular respiration

Breathing also removes carbon dioxide, which is the waste product of cellular respiration.

But cellular respiration is a chemical process that occurs in cells, not the mechanical process that occurs in your lungs

Page 9: Cell Energy The Cell in Action. Cell Energy  Why do you get hungry?  Feeling hungry is your body’s way of telling you that your cells need energy

What cellular respiration is It is a chemical process where food (such as

glucose, a simple sugar) is broken down into carbon dioxide and water and energy is released

It is the opposite of photosynthesis.

It is used to make ATP by the mitochondrian, and maintain an animal’s body temperature.

Page 10: Cell Energy The Cell in Action. Cell Energy  Why do you get hungry?  Feeling hungry is your body’s way of telling you that your cells need energy

A Symbiotic Relationship

Page 11: Cell Energy The Cell in Action. Cell Energy  Why do you get hungry?  Feeling hungry is your body’s way of telling you that your cells need energy

Connection between Photosynthesis and Respiration…

Photosynthesis Cellular Respiration

Plants

Changes carbon dioxide to oxygen

Plants need the CO2 for photosynthesis

Animals

Changes oxygen to carbon dioxide

Animals need the O2 for respiration

Page 12: Cell Energy The Cell in Action. Cell Energy  Why do you get hungry?  Feeling hungry is your body’s way of telling you that your cells need energy

FermentationHave you ever had a side stitch after running?

Page 13: Cell Energy The Cell in Action. Cell Energy  Why do you get hungry?  Feeling hungry is your body’s way of telling you that your cells need energy

FermentationWhen your muscles can’t get the oxygen needed for cellular respiration, they use the process of fermentation for energy.

In fermentation, glucose molecules (sugars) are broken down, but oxygen is not used.

The waste products of fermentation are lactic acid, alcohol, and carbon dioxide.

Page 14: Cell Energy The Cell in Action. Cell Energy  Why do you get hungry?  Feeling hungry is your body’s way of telling you that your cells need energy