Photosynthesis & Respiration - Weebly Photosynthesis & Respiration Introduction to Energy...

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Transcript of Photosynthesis & Respiration - Weebly Photosynthesis & Respiration Introduction to Energy...

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    Photosynthesis & Respiration

    Introduction to Energy

    Biochemistry

      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.

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    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

    Animal Cells

      We make energy using our Mitochondria

      Mitochondria make energy though cellular energy conversion in cycles

      Cellular Respiration

      The release of energy takes place through the breakdown of food molecules

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    Cellular Respiration

     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.

    Cellular Respiration

     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!

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    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

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    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

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    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?)