Topic Three: Nutrition, Photosynthesis and Respiration
Reminder: All life processes are chemical activities which make up your______________.
I.
Nutrition: Taking in nutrients (_______) for various activities including:
1. Respiration (________)
2. ___________
3. Repair
A) Autotrophic Nutrition: Organisms take _________________materials (CO2, H2O) and convert
them into organic nutrients (__________).
1. Auto =________; troph = ________so Autotroph = ____________.
2. _____________is most common form of autotrophic nutrition
3. Ex: plants,__________.
Word Bank: algae
food
photosynthesis
metabolism
self-feeding
glucose
simple-organic
feeding
self
growth
energy
II. Photosynthesis: Process in which sun’s energy is trapped in the chemical _________of sugar.
A) Requires______, CO2 and H2O.
B) Makes ________(C6H 12O6) as food.
C) ________and ________are waste products.
D) Benefits:
1. Provides _______for all plants, animals and other organisms.
2. Provides oxygen to__________.
3. Removes _____________from atmosphere.
E) Plant adaptations:
1. Chloroplast: Cell organelle that does________________.
2. Gas exchange:
 Stomata : _______________under a leaf; let gases in and out.
Word Bank: photosynthesis
glucose
sunlight
holes
food
oxygen
water carbon-dioxide
bonds
III. Cellular Respiration: Process that takes ____________from sugar molecules and places it in
molecules of___________.
A) ATP is the ___________all life uses for energy.
 No organism can get energy from ___________or sugar without first putting the energy
into ATP.
B) Requires__________, oxygen and water.
C) ___________and ___________are waste products.
D) Most organisms carry out aerobic respiration (uses oxygen) in their___________.
Word Bank: ATP
water
molecule
mitochondria
energy
glucose
sunlight
carbon-dioxide
E) Photosynthesis and Cellular Respiration are _________reactions! They are also important in
__________oxygen, carbon, hydrogen and water through the environment.
_________________
____________ + CO2 + H2O  glucose + O2 + H2O
_____________________
glucose + O2 + H2O  CO2 + H2O + ______
IV. All living things must maintain ______________in order to stay alive.
A) Homeostasis: A ______________state in the body.
B) Failure to maintain homeostasis results in ____________or death.
C) Homeostasis is often maintained using ____________mechanisms.
1. Feedback mechanisms are __________in which the product of one reaction causes another
to start or stop.
Word Bank: cycling
opposite
exchanges
energy
cellular-respiration homeostasis photosynthesis balanced
respiration
ATP
disease feedback
sunlight
cycles