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Science cell

structure + function of a cell

TermDefinition
Cell Basic unit of structure and function in living things
Microscope Instrument that magnifies objects to make small things look larger
Simple microscope Only has one lens
Compound microscope Has more than one lens
Robert Hooke English Scientist Looked at cork- called them "cells"
Anton van Leeuwenhoek Dutch business man Made his own lenses Looked at pond water- saw "animalcules"
Cell theory All living things are composed of cells Cells are the basic unit of structure and function in living things All cells are produced from other cells
Resolution Ability to clearly distinguish individual parts of an object
Element Any substance that cannot be broken down into simpler substances
Atom Smallest unit of an element
Compound Two or more elements combined chemically
Molecule Smallest unit of most compounds
Organic compounds contain ________ Carbon
Define and give examples of a carbohydrate Energy rich organic compound Sugar and starches ex: potatoes, noodles, rice, bread=starch
Protein Made up of amino acids ex: meat, eggs, fish, nuts, and beans
Enzyme Type of protein that speeds up chemical reaction
Lipid Fats, oils, waxes Cholesterol is a lipid Gives more energy Body stores lipids for later use
What do nucleic acids do? (DNA & RNA) DNA- Genetic material passed of from parent to offspring -Directs function of cell RNA- Production of proteins
Selectively permeable Some substances can pass through while others cannot
Diffusion Movement of molecules from an area of high concentration to an area of low concentration
Osmosis The diffusion of water molecules through a selectively permeable membrance
Passive transport Movement of materials through a cell membrane without using energy
Active transport Movement of materials through a cell membrane using energy
Created by: MSSstudy