Cells Flashcards
What are cells?
Smallest living unit
Most are microscopic
Who discovered cells
Robert Hooke (mid 1600s)
Observed cork
Cell theory
All living things are made of cells
All cells come from cells
Cells are the smallest unit of life
Characteristics of all cells
A surrounding membrane
Cytoplasm
Organelles
Control center of dna
What are the cell types
Prokaryotic and eukaryotic
What is the plasma membrane
CELL MEMBRANE!!
Double layer of phospholipids and proteins
What is a phospholipid
The fats that make up the cell membrane
Movement across a plasma/cell membrane
It is semi permeable
What does a membrane protein do?
transports stuff
Recognizes certain chemicals
What types of membrane proteins are there?
Glycoproteins (identify cell type)
Enzymes (cartelized production of substances)
Cell wall differences between plants and fungi
Plants are mostly cellulose
Fungi is mostly chitin
Cilia
Little hairlike thingys on the outside of cells
Flagella
Sperm tails
Centrioles
Pairs of micro tubular structures
Play a role in cell division
Nuclear envelope
Separates nucleus from the rest of the cell
Double membrane
Has pores
Nucleolus
Most cells have two or more
Forms ribosomes
Golgi bodies
Packaging and shipping center of the cell
Lysosomes
Helps with cell renewal
Breaks down old cell parts
Vacuoles
Storage sacs
Garbage dump
What are the 2 bacteria like organelles
Mitochondria (release energy)
Chloroplasts (store energy)
Mitochondria
Have their own dna
Bound by their own membrane
