Photosynthesis & Respiration - Weebly Photosynthesis & Respiration Introduction to Energy...
Embed Size (px)
Transcript of Photosynthesis & Respiration - Weebly Photosynthesis & Respiration Introduction to Energy...
Photosynthesis & Respiration
Introduction to Energy
Why do we have to learn about chemistry in biology class?!
Because ALL living things are made of cells, which are made of non-living chemicals (molecules)… INCLUDING YOU!
Example: Calcium in bones, Iron in blood, Water in cells, Oxygen in lungs, Fluorine in your teeth… etc. (22 total)
CHNOPS! You’ll see this later in the notes.
Cells Energy ATP – Adenosine Tri-Phosphate
Cell’s or the body’s energy molecule
There is an energy requirement in living systems ATP is called Energy Currency
We need ATP for EVERYTHING
We make energy using our Mitochondria
Mitochondria make energy though cellular energy conversion in cycles
The release of energy takes place through the breakdown of food molecules
Uses the glucose we eat and the glucose plants make, plus oxygen we breath to create up to 38 molecules of ATP – as well as the water and carbon dioxide we breath out.
Broken into three main parts 1. Glycolysis: Sugar splitting phase (glucose
is the sugar)
2. Kreb’s Cycle (a.k.a. Citric Acid Cycle): Extracts the energy from glucose
3. Electron Transport Chain: Turns the energy into ATP for the body to use
In total, 34 – 38 ATP is made!
Cellular Respiration Equation C6H12O6 + 6O2 è 6CO2 + 6H2O + ATP
Reactants are on the left of the arrow: Glucose Oxygen
Products are on the right of the arrow: Carbon Dioxide Water ATP
What does this equation mean?!
If the equation for Carbon Dioxide is CO2, that means there is:
1 Carbon molecule (nothing in front of or behind the molecule means 1)
2 Oxygen molecules Carbon and Oxygen are joined together into a
compound. Since there is not a number in front of the CO2 that means there is only 1 carbon dioxide compound.
What does the chemical formula for water mean? H2O
Types of Cellular Respiration
Two types of cellular Respiration 1. Aerobic Respiration – Requires Oxygen,
produces more ATP
2. Anaerobic Respiration – Does NOT require Oxygen, makes less ATP
Photosynthesis Photosynthesis is the ultimate source of all the
food you eat and all the oxygen you breathe
The process in which plants make their own food (glucose) and oxygen is a byproduct
Takes place in plant cells and other photosynthesizing organisms
Specific Location: Chloroplast Needs sun and the pigment chlorophyll
Photosynthesis Equation 6CO2 + 6H2O + ATP è C6H12O6 + 6O2
Reactants are on the left of the arrow: Carbon Dioxide Water ATP Chlorophyll
Products are on the right of the arrow: Glucose Oxygen
Cycles Why do plants and animals need each other?!
They are a cycle
What would happen to plants if all animals died (and vice versa?)