Limited Time Offer: Get 2 Months of ABCmouse.com for only $5!

"20 Days to Regents" Review - Lesson 1

Topic 1: Cells – Day 1

  • Homeostasis is the ability of an organism to maintain a stable internal balanced environment.  Failure to maintain homeostasis can result in SICKNESS or DEATH. 
  • Metabolism is the sum of all the chemical reactions that occur within the cells of an organism. 
  •  Organic molecules contain skeleton structures of carbon with hydrogen and oxygen.
Organic MoleculeBasic Unit - (Lego Blocks)Foods found
Carbohydrates (starch)Glucose (Simple Sugars)Grains, vegetables, fruit
ProteinsAmino Acid (20 kinds)Meat, egg whites, beans
LipidsFatty Acid & GlycerinAnimal fats, nuts, oils
Nucleic AcidNucleotideSmall amounts in all foods

  • Organization of living things:           

             Cells    --->      Tissues     --->        Organs     --->     Organ Systems   --->       Organism                                               [smallest]                                                                                                                                    [biggest]  

Get 2 Months for $5!