Chapter 3 Flashcards
who discovered the cell?
Robert Hooke
Who was first to observe living microorganisms
Anton Van Leeuwenhoek
What is the Cell Theory?
All living things are made up of cells
Cells are the basic units of structure and function in living things
New cells are produced from existing cells
usus beams of light or electrons to produce magnified images
Microscopes
microscope where light passes through the specimen and uses 2 lenses to form a 2D image (Can magnify up to 1000 times)
Light Microscope
type of microscope where beams of electrons are sent and can only pass through extremely thin slices of the specimen, so images are 2D (only examines nonliving things)
TEM (transmission electron microscopes)
type of microscope where beams of electrons focused on magnetic fields is scattered over the surface of a specimen, so images are 3D (only examines nonliving things)
SEM (scanning electron microscope)
a photo of an object seen through a microscope
Micrograph
type of cell that is bigger, more complex, and has membrane bound organelles (plants and animals)
Eukaryotic
Type of cell that is smaller, simpler, and has no membrane bound organelles (bacteria)
Prokaryotic
small structures inside a cell that have specific functions
Organelles
transport of particles that doesn’t require energy
Passive Transport
process where particles move from an area of high concentration to low concentration
Diffusion
process where molecules that cannot directly diffuse across the membrane pass through special membrane
Facilitated Diffusion
the movement of water through solutes from low solute concentration to high solute concentration. Water moves to make concentration equal.
Osmosis
the concentration of solutes is the same inside and out of the cell (there’s water inside and out of cell)
Isotonic
the solution has a higher concentration of solute concentration than the cell (water outside of cell)
Hypertonic
the solution has a lower concentration of solute than the cell (water is inside the cell)
Hypotonic