Energy• Defined as: The ability to do work • 1. some processes that require energy are obvious • Ex: playing sports • 2. some processes, not so obvious • Ex: making proteins in your sleep
Objective: Howis the energyfrom the suntransferred toorganisms?
Where does the energy in foodcome from?
…The sun! PLANTS AND SOME OTHER TYPES OF ORGANISMS ABLE TO USE LIGHT ENERGY FROM THE SUN TO PRODUCE FOOD!
Think about it…• Where does all the energy from the food you eat – ORIGINALLY – come from?? • Seriously, try and name a food… • All of the energy in the food came from the sun • Cows: eat grass; grass utilizes photosynthesis • Humans: eat cows, who eat grass that does photosynthesis • Tree: photosynthesis • Apple: comes from an apple tree (photosynth.)
Organisms are classified onhow they get energy1. Autotrophs • Able to use the sun’s energy directly • Make their own food through PHOTOSYNTHESIS • Ex: plants, grass, certain bacteria
Organisms are classified onhow they get energy2. Heterotrophs • Cannot use the sun’s energy DIRECTLY • Obtain energy from foods they consume or absorb • Ex: animals, fungi
Adenosine Triphosphate Aka ATP or energy (made where?) 1. principal compound that organisms store energy 2. consists of: Ribosesugar Adenine nitrogenous base 3 phosphate groups
How is the energy in ATP used?KEY IDEA 1: Used to carry out biological processes,metabolic functions, and the eight life functionsKEY IDEA 2: These traits make ATP great moleculethat is used by all organisms as an energy source Energy stored in ATP is released when ATP is converted to ADP and a PHOSPHATE GROUP Can store and use energy as needed
ATP is like a rechargeablebattery the body uses.
How ATP is used1. Metabolic ractions, biology processes Used with enzymes*****2. Active transport Moving solutes from low to high conc. Ex: Na+/K+ pump3. Movement within cells Cellular motors that move along fibers
Regents Review The rate at which all organisms obtain, transform, and transport materials depends on an immediate supply of 1.ATP and enzymes 2.solar energy and carbon dioxide 3.carbon dioxide and enzymes 4.ATP and solar energy
Glucose vs. ATP“Organic molecule that “Energy the cell can usehas the potential to for biological processes”make energy” Cells only have small Sugar molecule amount of ATP 90x more energy Can’t last long than ATP One molecule of glucose can make lots of ATP
Think of it like this….A tree has a lot of potential planks of wood You need to break up the tree to use the wood The glucose is the tree (a lot of potential but unusable wood) The ATP is the pieces of broken down wood (the wood that you can use are the house)
Regents ReviewWhich statement best describes one of the events takingplace in the chemical reaction?1.Energy is being stored as a result of aerobic respiration.2.Fermentation is taking place, resulting in the synthesis ofATP.3.Energy is being released for metabolic activities.4.Photosynthesis is taking place, resulting in the storage ofenergy
Citations Allpictures taken from google pictures/powerpoint clipart