unit of structure and function of living things
seeks to discover how cellular mechanisms of a living thing actually work
Observed cork - First to use "cell"
Schieden and Schwann
Developed cell theory
All living things are composed of living units called cells and of cell products. All cells come only from preexisting cells.
Size, Number, Shape
Something that is so amazing complex, it had to be fully formed and functional from the beginning or it could not exist at all.
3 main parts of the cell
Cell membrane, nucleus, cytoplasm
Cell Membrane consists of:
Phospolipids, proteins, cholesterol, carbohydrates
Phosphate portion: Hydrophilic - water
Fatty acids portion: Hdyrophobic - water
where is protein found?
on surface or in membrane
Protein does what?
Movenment of material across the membrane;
cell to cell interaction
Nucleus consist of what three things?
Nuclear membrane, Nucleolus, and chromatin
Nuclear membrane has what?
Double phospholipid bilayer and nuclear pores
Nuclear membrane holds what?
What do nuclear pores do?
functions as gates, regulates the transport of large molecules in and out of the nucleus
Nucleolus is at what site?
Ribosome formation (where proteins are made)
Most conspicuous part of nucleus?
has DNA and protein. Condenses into coils called Spools and rakes.
fluid medium of the cell. gives a place for life's functions. contains cytoskeletion and organelles
cellular framework composed of microtubules. provides shape, enables movement within a cell and of a cell. based around centrioles
Little organ. Mitochondria: power plants. produce ATP. Highly folded inner membrane.
two parts of robosomes
read information to make proteins.
Endoplasmic Reticulum (ER)
1. rough ER - ribosome attached
2. Smooth ER - detoxification, lipid metabolism
shipping center. resembles stack of hollow pancakes. Loads proteins into vesicles
Recycling. acidic interior. :Digest" food, cell destruction
storage containers, variety of material and functions.
Maintaining a stable internal environment. Osmotic pressure.
food and waste
maintenance and repair
use energy (sunlight) to make food
use food to make energy (ATP)
Movement in and out of cells
endocytosis - phagocytosis and pinocyosis
Movement of cell
Master Program of the cell
DNA full name
Dr James Wastson and Dr. Francis Crick
Part of the DNA molecules in human cell
# of DNA in human cell?
# of genes found in our DNA
25,000 to 30,000
found only in the nucleus
storage for cell function
DNA very tightly coiled
Structure of DNA
Phosphate and sugar molecules
Building blocks of nucleic acids.
group of three nucleotides
code for one amino acid
building blocks of proteins