Chp 3 -review sheet flash cards
1 What is cytology
the study of cells
2 why is Robert Hooke important
he coined the word cell
- Why are Matthias scheilden, theodor schwann and zacharias jassen important
- (scheilden) plants are made of cells
- (schwann) animal are made of cell
- (jassen) invented the compound microscope
- why is Leeuenwenhooke important
father of microscopy, made lense that improved use
first to find a microscopic organisms
- what did rubalf virchow say
cells come from preexisting cells
- what are the 3 principles of the cell theory
- all organisms are made of 1 or more cells
- cells are the buildings blocks of life
- all cells some existing cells
- what is the difference btwn unicellular and multicellular
unicellular - one cell (bacteria)
multicellar - many cells ( animals, plants humans)
- what is colonial orgasms
similar cells working together
- what is the differnce btwn tissure organ and organ system
tissue - similar cells working together
organ - similar tissue working together
organ system - organs working together
- difference btwn eukaryotic and prokaryotic
eukaryotic - membrane around the nucleus (anything but bacteria)
prokaryotic -no membrane around the nucleus (bacteria)
What are the 2 names of the cell membrane
- screen door
- plasma membrane
were is the cell membrane found
on the cell wall
difference btwn hydrophilic and hydrophilic
what parts are they on the cell membrane
hydrophilic- (heads) loves water
hydrophilic - ( tails) hates water
What structure on the cell membrane allows things to pass through it?
phospholipid bilayer
how does signal transmission across a membrane happen?
receptor protein recieves signal molecules (ligands) that cause a response in the cell
Where are cell walls found?
what do they do?
What is it made of?
the outermost layer of the plant cell
they protect the cell
they are made of cellulose
Difference btwn the primary and secondary wall
primary - made when the cell is developing
secondary - produced when the cell is mature ( more cellulose)
What does cytoplasm do?
How does it look?
How does it differ from cytosol?
cytoplasm keeps the cells in place
it looks like jelly, or a liquid
cytosol is the liquid of cytoplasm