1. Cell Energy Respiration Chapter 2, Section 2 Pages (38-41)
Plant cells
Animals Cells
Respiration

2. Chemical Reactions are responsible for
the energy that plants and animals receive. It
all starts from our Sun!!! Lets find out how!
Watch the following video clip!

3. Introduction to Photosynthesis 13 min.
Photosynthesis: Plants converting sunlight into food energy for themselves.

4. Photosynthesis Process by which plants gather sunlight (energy,
carbon dioxide and water to make glucose (food
for the plant) and oxygen. Takes place in the
chloroplasts within the plant cell.

5. Plants use the following compound, elements and
What does this “chemically” look like?
To begin with:
Plants use the following compound, elements and
energy to make their own food.
Carbon dioxide (Co2) + Hydrogen (H) + Oxygen (O) + energy (sunlight)
The above chemicals come from water (absorbed through their roots),
air (Co2 from our atmosphere) and light energy from the sun.

6. Finally, After the plant has produced its own food called
glucose (sugar) and oxygen.
Finally,
The plant releases oxygen, back into the air, that it doesn’t use.
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Answer the following questions:
1. Why do plants produce their own food?
Plants do not have food supplied to them like we do.
Plants must take in the necessary materials so they
can grow and reproduce.
2. Why might a seed “shrivel” on a plant?
As a seed grows it uses energy from the
plant. If the plant can not supply the seed
with enough nutrients, the seed will shrivel.

7. Seed and root development
Plants store their food in different places!!
Lets first look at where plants do not store their food
Plants do not store their food in the soil, surrounding water or in the air!!!!
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Plants do, however, store their food in their seeds, roots, leaves and even the fruits or nuts they produce.
Seed and root development
during germination

8. Plants can grow indoors
Plants can grow indoors. How can this happen with very little natural sunlight?
Light?
Plants are all different and therefore require different amounts of
sunlight for growth. Artificial light produced indoors will work!!!

9. What happens to photosynthesis at night?
The process stops at night because light can not reach the plant.

10. Plant life also provides nutrients for our needs.
Wait, stop…………………… What’s a nutrient?
The photosynthesis process produces glucose (sugar).
These simple molecules are also known as carbohydrates.
Bread
Potatoes
Fruit
Cereal
Grains

11. What is Nutrient? We hear the term all the time,
but do we really know what it means?
A group of chemicals present in food that provide energy, cell building
and structural materials, and body chemistry regulating agents known
to be essential for life.
Nutrients are classed into: proteins, fats, carbohydrates
(includes energy rich sugars), vitamins, minerals, and water.

12. Plant life also provides nutrients for our needs.
O.K., lets do this again!!!!!
Plant life also provides nutrients for our needs.
The photosynthesis process produces glucose (sugar).
These simple molecules are also known as carbohydrates.
Bread
Potatoes
Fruit
Cereal
Grains

13. High amounts of protein are found in beans and peanuts
One of the basic components of food and makes all life possible
High amounts of protein
are found in beans and peanuts

14. Fats and Oils olive oil olives nuts canola oil and avocado
Vegetable fats and oils are substances which
can also be derived from plants.
olive oil
olives
nuts
canola oil
and avocado

15. Cellular Respiration (pages 39-40)
The process by which cells use oxygen
to produce (release) energy from food

16. Cellular Respiration (1:29 min.)

17. Cellular respiration releases carbon dioxide and water,
Key Idea:
Cellular respiration releases carbon dioxide and water,
which are used by plant cells to make glucose.
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Mini Quiz time: (True or False)
1. Plants and animals capture
their energy from the sun
False
2. Cellular respiration describes
how a cell breathes.
False
3. One function that all cells
perform is that they must
take in food
True
During cellular respiration the cell takes in carbon, hydrogen and oxygen and releases carbon dioxide, water and energy
True

18. What happens if your cells can’t get the oxygen they need?
Fermentation p. 41
A process called occurs
When muscles can’t get the oxygen they need, they get energy
from the burning of compounds including carbohydrates.
This produces lactic acid which makes your muscles feel
tired and sore (causing a burning sensation).

19. The End