1. Aim: How are photosynthesis and Respiration related?
Do now

2. Complete the following Diagram
Use arrows To show the direction of the following:
Sunlight
CO2 O2
H2O
Glucose

3. Plants are energy producers
Like animals, plants need energy to live
unlike animals, plants don’t need to eat food to make that energy
Plants make both FOOD & ENERGY

4. How do plants make energy & food?
Plants use the energy from the sun
to make sugars:
glucose, sucrose, cellulose, starch, & more
sun
sugars

5. Using light & air to grow plants
Photosynthesis
using sun’s energy, CO2 & water to make sugar
Occurs in chloroplasts
Allows plants to grow
Make oxygen (O2)
as a waste product
 glucose + oxygen
carbon
dioxide
sun
energy
+ water +
6CO2
6H2O
C6H12O6
6O2
sun
energy  +

6. Chloroplasts absorb sunlight & CO2 Leaf Leaves CO2
Chloroplasts in cell
Chloroplast
Chloroplast
Chloroplasts
contain
Chlorophyll
make ENERGY & SUGAR

7. Chloroplasts are only in plants
animal cells
plant cells

8. So what does a plant need?
Needs:
Energy (sunlight)
CO2
H2O
To make: O2
Glucose
leaves
shoot
roots
6CO2
6H2O
C6H12O6
6O2
light
energy  +

9. Leaf Structure vascular bundle (vein) xylem (water) phloem (sugar)
cuticle
epidermis
palisades
layer
spongy
layer
epidermis
stomate
guard cells
cuticle

10. Transpiration xylem (water) stomate guard cells CO2 in O2 out
H2O
CO2
stomate
guard cells
CO2 in
O2 out
water out
so it gets to leaves from roots O2
H2O
CO2

11. Transpiration Water evaporates from the stomates in the leaves
pulls water up from roots like a straw

12. Stomates & Guard Cells guard cell stomate
Function of stomates is to let:
CO2 in
O2 out
H2O out
Function of guard cells
open & close stomates to control H2O loss
guard cell
stomate

13. Guard cells & Homeostasis
keeping the internal environment of the plant balanced
Stomates open
let CO2 in
needed to make sugars
let H2O out
needed for photosynthesis
let O2 out
get rid of waste product
Stomates close
if too much H2O evaporating

14. Xylem
carry water up from roots

15. Phloem: food-conducting cells
carry sugars around the plant wherever they are needed

16. What is Respiration?
The method cells used to make energy in the form of ATP
Happens in the Mitochondria
Sugars are broken down
In the presence of oxygen
aerobic respiration
Without oxygen:
Anaerobic respiration
Example: Fermentation

17. Mitochondria are in both plants and animals
plant cells
animal cells

18. Mitochondria

19. What does the mitochondria need?
Needs:
Glucose O2
Makes:
CO2
H2O
Energy (ATP)
glucose + oxygen  carbon + water + energy
dioxide
C6H12O6
6O2
6CO2
6H2O
ATP  +

20. How does Glucose and O2 get to the Mitochondria?
Glucose is absorbed by the digestive system
Oxygen is taken in by the respiratory system
Both systems are connected to the circulatory system which moves materials to and from the cell?

21. Mitochondria Almost all eukaryotic cells have mitochondria
there may be 1 very large mitochondrion or 100s to 1000s of individual mitochondria
number of mitochondria is correlated with aerobic metabolic activity
more activity = more energy needed = more mitochondria
What cells would have a lot of mitochondria?
active cells:
• muscle cells
• nerve cells

22. glucose + oxygen  carbon + water + energy
How are they connected?
Respiration
glucose + oxygen  carbon + water + energy
dioxide
C6H12O6
6O2
6CO2
6H2O
ATP  +
Photosynthesis
So, in effect, photosynthesis is respiration run backwards powered by light.
Cellular Respiration
oxidize C6H12O6  CO2 & produce H2O
fall of electrons downhill to O2
exergonic
Photosynthesis
reduce CO2  C6H12O6 & produce O2
boost electrons uphill by splitting H2O
endergonic
6CO2
6H2O
C6H12O6
6O2
light
energy  +
 glucose + oxygen
carbon
dioxide
sun
+ water +

23. The Great ENERGY Circle of Life
sun
Photosynthesis
plants
glucose sugar
CO2 +
H2O + O2
Respiration
animals & plants
ATP

24. Correct your Diagram
Use arrows To show the direction of the following:
Sunlight
CO2 O2
H2O
Glucose