Cells Flashcards
robert hooke
the discovery of the cell
antionie van leeuwenhoek
saw bacteria and made his own microscope
the cell theory (3 parts)
- all living things are made of cells
- the cell is the basic unit of structure/function
- cells come from pre-existing cells
matthias schleiden
discovered that all plants were made of cells
theodor schwann
discovered that all animal were made of cells
rudolf virchow
cells come from pre-existing cells
eukaryotic cells
have a nucleus
prokaryotic cells
don’t have a nucleus (bacteria)
cell membrane
surrounds animal and plant cells, selectively permeable, contain phospholipid bilayers
cytoplasm
jelly-like substance inside the cell membrane that is the medium for chemical reactions/metabolism. composed of water, salts, various organic chemical materials
mitochondria
supplies energy to the cell, is a double membrane and produces ATP. contains two membranes that enclose it. “bean” structure
ribosomes
made up of RNA and protein and does protein synthesis. doesn’t have lipid bilayer and is located on rough ER
rough ER
intracellular pathway for proteins to be assembled and folded. has ribosomes and look like sheets
smooth ER
doesn’t have ribosomes, synthesis of lipids and has the process of detoxification
golgi apparatus/body
modify, sort, storage, and package proteins. help manufacture and store cellular secretions.
lysosomes
membrane-bound organelle that contains digestive enzymes for breaking down macromolecules. lipid-bilayer.
peroxisome
small membrane-enclosed organelle that contains catalase to break down hydrogen peroxide to maintain the organelle’s balance.
vacuole
membrane-bound organelle that is found in both animals and plants which contains storage for water, carbs, salts, etc.
flagella
whip-like extensions of the cell surface, helps aid in movement
cilia
move water relative to the cell in a regular movement. made of microtubules. hair-like and short
cytoskeleton
helps cells maintain their shape and internal organization. provides support that enables cells to carry out essential functions like division and movement.
microfilament
assist with cell movement. is threadlike and thin structure and is made of a protein called actin.
microtubules
regulate cell growth/movement. cylindrical shell/hollow tube
vesicle
intraceullar structure that takes proteins from ER to golgi apparatus
nucleus
has its own membrane and stores hereditary material which eventually guides the production of proteins indirectly
chromosomes
where genes are located and are threadlike (organized)
chromatin
DNA/protein however are unorganized chromosomes/uncoiled DNA
nucleolus
located inside nucleus and creates ribosomes
chloroplasts
contains chlorophyll (green) and is a conversion factory for sun energy to glucose
chromoplasts
all other pigments are created here
leukoplasts
don’t have pigments and store starch. use hydrolysis and is found in roots
cell wall (plant and bacteria)
rigid/not flexible and is made up of cellulose
centrioles
help in cell division