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PhotosynthesisCh. 2.1 Cell processes and energy
How do all living things get energy? REMEMBER: Autotroph- “auto” self “ troph” nourish Heterotroph “hetero” other or different So autotroph makes their own food
(plants) Heterotroph gets food from other
sources
The sun is the greatest energy source Photosynthesis- “photo” means light And “synthesis” means putting together All living things get energy from the sun
indirectly or directly ….. How? Autotrophs? Heterotrophs?
Photosynthesis: Stage 1 CHLOROPHYLL -
the main pigment found in chloroplast. Acts like a solar cell can have other color (yellows red orange) but usually hidden by green1st stage of photosynthesis -energy from light is captured During stage one INSIDE THE CHLOROPLAST THE WATER H20 is split into hydrogen H and oxygen O. Oxygen is given off as a waste product.
Photosynthesis: Stage 1
Photosynthesis video
Photosynthesis: Stage 2
Equation of Photosynthesis
Cellular Respiration 2.2 Cells obtain ENERGY from SUGAR! Cells break down glucose and other
molecules from food in the presence of Oxygen, releasing energy.
BOTH PLANTS AND ANIMALS UNDERGO CELLULAR RESPIRATION.
Cellular respiration: Cellular respiration overview
Molecules of glucose are broken down into smaller molecules(happens in the cytoplasm)
Part 2: in the mitochondria the molecules are broken down even more and use oxygen and release energy and CO2
Fermentation: energy releasing process w/o Oxygen Alcoholic: makes
alcohol,CO2, and energy using yeast
Lactic Acid: using energy in the cells and the CO2 builds up and produces acids
Cell Division: producing new and healthy cells Growth repair damaged
structures reproduce
Cell Cycle: Cell grows Prepares for
division Divides into two
cells called daughters
Three Main stages:
Interphase- cell grows, makes a copy of the DNA, and prepares to divide
Mitosis Stage 2 Nucleus divides DNA is given to
each new nucleus Divided into four
stages: Prophase,
metaphase Anaphase telephase
Mitosis Mitosis with chrom
atid
Cytokinesis: the cytoplasm divides The cytoplasm
divides and you have two new cells
It begins about the same time as telophase.
Animals- splits in two
Plant- forms a cell plate and the plate forms a cell membrane which in turn forms a cell wall