4.1 Chemical Energy and ATP
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4.1 Chemical Energy and ATP. 2.1 Atoms, Ions, and Molecules. Set up Cornell Notes on pg. 37 Topic: Chemical Energy and ATP Essential Question : How are some organisms able to survive without sunlight and photosynthesis?.

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4.1 Chemical Energy and ATP

2.1 Atoms, Ions, and Molecules

  • Set up Cornell Notes on pg. 37

  • Topic: Chemical Energy and ATP

  • Essential Question:

    How are some organisms able to survive without sunlight and photosynthesis?

How are some organisms able to survive without sunlight and photosynthesis?

Key Concept: All cells need chemical energy



The phospholipid bilayer of a cellular membrane is shown in the diagram above. Active transport is the primary function of the structure labeled

"A".

"B".

"C".

"D".


The phospholipid bilayer of a cellular membrane is shown in the diagram above. Active transport is the primary function of the structure labeled

"A".

"B".

"C".

"D".


  • Which of the following statements is true about cell structure?

  • Cells are enclosed by a thin, single layer of phospholipids and protein molecules

  • Cells are enclosed by a solid layer, or cell wall, for support

  • Cells are enclosed with semipermeable membranes

  • Cell casings allow molecules to pass unhindered in or out of the cell


  • Which of the following statements is true about cell structure?

  • Cells are enclosed by a thin, single layer of phospholipids and protein molecules

  • Cells are enclosed by a solid layer, or cell wall, for support

  • Cells are enclosed with semipermeable membranes

  • Cell casings allow molecules to pass unhindered in or out of the cell


organism W and organism Z

organism X and organism Y

organism X only

organism Y only


organism W and organism Z

organism X and organism Y

organism X only

organism Y only


Osmosis occurs in living organisms as water moves across the cellular membrane. An environment is hypotonic when the concentration of solutes in the environment is less than the concentration of solutes inside the cell.In hypotonic environments, water flows

inside and outside the cell at equal rates.

from the cell into the environment.

from the environment into the cell.

from high concentration of solutes to low concentration of solutes.


Osmosis occurs in living organisms as water moves across the cellular membrane. An environment is hypotonic when the concentration of solutes in the environment is less than the concentration of solutes inside the cell.In hypotonic environments, water flows

inside and outside the cell at equal rates.

from the cell into the environment.

from the environment into the cell.

from high concentration of solutes to low concentration of solutes.




KEY CONCEPT cellular membrane. An environment is All cells need chemical energy.


P. 36 cellular membrane. An environment is

ATP and ADP picture


Top of pg 36
Top of pg. 36 cellular membrane. An environment is

  • Do energy drinks or power bars do something different from any other foods you eat?

    • If so, what do they do? (how do they affect you?)

    • What causes them to do this? (ingredients?)

They may contain certain types of carbohydrates that can be used more quickly and so supply energy faster.

Note: An energy bar provides no more energy than a bagel or banana


California standard
California Standard cellular membrane. An environment is

1.f- Know that useable energy is captured from sunlight by chloroplasts and is stored through the synthesis of sugar from carbon dioxide.


Ch 4 in a nutshell
Ch. 4 In a Nutshell… cellular membrane. An environment is

  • *The cells of ALL organisms need chemical energy for ALL of their processes.

  • Plants absorb energy from sunlight

    • Some of that energy is stored in sugars (Photosynthesis)

  • Cells break down sugars to produce usable chemical energy for their functions (Cellular Respiration)

  • *Without organisms that make sugars, living things on Earth could not survive


Photosynthesis and cellular respiration
Photosynthesis and Cellular Respiration cellular membrane. An environment is


The chemical energy used for most cell processes is carried by adenosine triphosphate aka ATP.

  • ATP transfers energy from the breakdown of food molecules to fuel all cellular functions

Remember from Ch. 2: Energy is released when bonds break!

  • When the unstable 3rd phosphate breaks off- A blast of energy is released!


phosphate removed by

-

+

  • Adenosine diphosphate aka ADP is a lower-energy molecule than ATP with only 2 phosphates.

  • ADP is changed into ATP when a phosphate group is added


Atp and adp
ATP and ADP by

Bonds break- releasing energy

+

-

Draw and label pg. 36



Foods that you eat by do NOT contain ATP.

  • First the food must be digested, which breaks down food into smaller molecules that can make ATP.


Carbohydrates are the molecules by most commonly broken down to make ATP.

adenosine

triphosphate

tri=3

adenosine

diphosphate

di=2

ATP

ADP


  • 80 percent of the energy in your body is stored in fat

  • Proteins are least likely to be broken down to make ATP.

(Fats)


Point to ponder pg 36
Point to Ponder (Pg. 36) by

  • If we get our energy from food….

    • Where does our food get its energy?

      • Hint: Your food is probably a plant or animal

  • Plants get their energy from the sun

  • Animals get their energy from the plants they eat

  • Ipso Facto: We all get our energy by using sunlight

through PHOTOSYNTHESIS!!!!!!!!!!!!!!!!!


A few types of organisms do not need sunlight and photosynthesis as a source of energy
A few types of organisms do not need sunlight and photosynthesis as a source of energy.

  • Some organisms live in places that never get sunlight.

  • In chemosynthesis, chemical energy is used to build carbon-based molecules.

    • uses chemical energy instead of light energy


Chemosynthesis video
Chemosynthesis Video photosynthesis as a source of energy.


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