Unit 2 Flashcards
(31 cards)
What can you view through a lift microscope?
Living or dead specimens
What is the total magnification of the most powerful light microscope
2000 times
Electron microscope
Forms an image using a beam of electrons
Specimen must be thin and dry
Can view micro structures
Dissecting microscope
Used to study external structures of small plants and animals
Ultracentrifuge
Separates materials by density
Why is staining used
To see details
Robert Hooke
Built the first microscope
Examined corks and found “cells”
Anton Van Leeuwenhoek
Viewed pond water and found unicellular organisms
Robert Brown
named the nucleus
Theodore Schwann
All animals are composed of cells
Mattias Schleiden
All plants are composed of cells
Rudolph Virchow
States new cells arise from preexisting cells
Cell theory
All lining things are made of one or more cells
Cells are the basic unit of function and structure
All cells arise from existing cells
Exceptions to the cell theory
Mitochondria and chloroplasts can duplicate themselves
Bread mold is made up of cytoplasm and not cells
Viruses consist of DNA surrounded by a protein coat
Types of cells
Animal
Bacteria
Plant
Flagella
Whip like structures that allow the cell to locomote
Cillia
Short hair like structures that allow the cell to move
What jobs do cells have
Gas exchange Eat-take in and digest food Make energy-ATP Build molecules- proteins, carbs , fats and nuclei acid Remove waste Maintain homeostasis Cell reproduction
Cell membrane
Controls what goes in and out
Allows communication
Semi-permeable
Vacuoles/vesicles
Move material around cell
Storage
Food and water storage
Plant
Central vacuole
Animal
Food vacuole and contractile vacuole
Contractile vacuole
Gets rid of excess water
Lysosomes
Digest food
Clean up and recycle
Mitochondria
Make ATP energy from cellular respiration
