1.1 Cells and Life light microscope cell theory homeostasis protein nucleic acid lipid carbohydrate

Early Ideas About Cells 1.1 Cells and Life Early Ideas About Cells Most cells can only be seen with a microscope.

Early Ideas About Cells (cont.) 1.1 Cells and Life Early Ideas About Cells (cont.) Most cells can only be seen with a microscope.

Microscopes Early microscopes 1.1 Cells and Life Microscopes Early microscopes A light microscope uses light and has one or more lenses that enlarges an image of something. Modern microscopes An electron microscope can enlarge images 100,000 times or more.

Cell Theory All organisms are made of cells. 1.1 Cells and Life Cell Theory All organisms are made of cells. The cell is the smallest unit of life. All new cells come from pre-existing cells.

Characteristics of Life 1.1 Cells and Life Characteristics of Life All organisms have common characteristics such as: organization responses growth and development reproduction maintain homeostasis use energy

Chemistry of a Cell The molecules in living things are made from: 1.1 Cells and Life Chemistry of a Cell The molecules in living things are made from: Sulfur Nitrogen Potassium Hydrogen Oxygen Carbon

Water—The Main Ingredient 1.1 Cells and Life Water—The Main Ingredient 2/3 of our body mass Inside cells and surrounds cells Allows transport of substances in blood

Water—The Main Ingredient (cont.) 1.1 Cells and Life Water—The Main Ingredient (cont.) Water molecules have negative and positive ends that attract each other. Under what conditions do cells gain or lose water?

Basic Substances in Cells 1.1 Cells and Life Basic Substances in Cells Macromolecules: Proteins Nucleic acids Lipids Carbohydrates

Proteins Folded chains or groups of folded chains of amino acids 1.1 Cells and Life Proteins Folded chains or groups of folded chains of amino acids

Nucleic Acids Long chains of molecules called nucleotides DNA RNA 1.1 Cells and Life Nucleic Acids Long chains of molecules called nucleotides DNA RNA

Lipids Lipids do not dissolve in water. The main kinds include: fats 1.1 Cells and Life Lipids Lipids do not dissolve in water. The main kinds include: fats phospholipids steroids waxes

Carbohydrates Made of one or more sugar molecule Store energy 1.1 Cells and Life Carbohydrates Made of one or more sugar molecule Store energy Make up the structural parts of cells

Where do new cells come from? A the food we eat B our parents 1.1 Cells and Life Where do new cells come from? A the food we eat B our parents C preexisting cells D carbohydrates Lesson 1 Review

Which is a characteristic of organisms? A birth B death C respiration 1.1 Cells and Life Which is a characteristic of organisms? A birth B death C respiration D organization Lesson 1 Review

How much of our body mass is water? A 90% B 75% C 66% D 30% 1.1 Cells and Life How much of our body mass is water? A 90% B 75% C 66% D 30% Lesson 1 Review

End of Lesson 1