Bio

cell

smallest unit of life, building blocks of organisms

organelle

structures in eukaryotic cells that serve specific fuctions

cell membrane

semi-permeable barrier that foes around the outside of the cell

selectively permeable

ability to control what goes in or exit

nuclear membrane

barrier around the nucleus to protect

nucleus

DNA is stored

cytoplasm

gelatin like filling inside cell

vacuole

storage area inside cell

lysosome

destroys old cell parts

cytoskeleton

skeleton of cell, internal threads provide structure

ribosomes

makes proteins

rough er

makes and ships protiens inside the cell

smooth er

makes and ships fats inside the cell

golgi body

recieves and sends out packages

chloroplast

captures energy energy and stores it as sugar

mitochondria

breaks down sugar to release stored energy

cell wall

rigid barrier that protects cell membrane

nucleolus

region inside the nucleus where ribosomes are made

vesicle

package of products being shipped

major differences between prok. and euk. cells

prok. has no nucleus or membrane bound organelles.

major differences in plant and animal cells

plant cells have chloroplast, a cell wall, and a large central vacuole

Isotonic

same conc. inside and outside the cell

hypertonic

water flows out of the cell, water conc. is higher inside the cell

hypotonic

water flows into the cell, water conc. is is lower inside the cellce

cells need to maintain a balance between their internal and external environments, this is called

homeostasis

the movement of water across the cell membrane is called

osmosis