First to observe and name cells underneath the microscope. Observed a cork and saw plant cells.
Anton van Leeuwenhoek
First to observe single celled organisms.
All plants are made of cells.
All animals are made of cells.
Cells only formed from existing cells.
Cell Theory 3 ideas
All living things composed of cells, cells basic unit of structure and function in living things, all cells are produced from other cells
Cell membrane (3)
Outer boundary, protects, controls what enters and leaves
Cell wall (4)
Only in plant cells, protection and support, made of cellulose, allows water and dissolved substances to pass through
Controls most activity, controls all genetic info in form of DNA, controls nuclear membrane which protects it
Contain genetic material which hold instructions to direct cell
Where ribosomes are made
Endoplasmic Reticulum (3)
Series of folded membrane that form sacs or tubes, carry proteins and other materials to cell parts, rough has ribosomes
Makes proteins which are transported to golgi bodies, in cytoplasm or rough ER, all cells must produce protein
Golgi bodies (2)
Storing and packing of proteins and other chemicals, mailroom
Produce energy, powerhouse, many in muscles, sausage shape
Only in plants, perform photosynthesis, contain chlorophyll pigment
Store food water or waste, plant cells have large ones that store water, some plants dont have them
created in golgi bodies and help with digestion
Bacterial cells (4)
very small, cell wall and membrane, no nucleus, have ribosomes
Tendency of molecules to move from a higher concentration to a lower concentration until equilibrium is reached.
Diffusion of water
Uses energy to move things in and out with transport proteins
higher concentration of solute, cell shrivels
lower concentration of solute, cell expands
Equal amounts of solute