balance in the cell and feedback
the internal balance of a system that keeps conditions stable
powerhouse of the cell, transforms energy from sugars into usable energy for the cell
mitochondria
provides strength and rigidity to the cell, contains pores so that materials can pass through it
cell wall
what is osmosis?
the diffusion of a solvent through a semipermeable membrane
the movement of molecules across a membrane without the use of chemical energy
passive transport
speeds up a cellular process
positive feedback
helps with cell division
centrioles
location of photosynthesis
chloroplast
what does isotonic mean?
when the cell and solution surrounding it have equal amounts of solute
what passes through the cell membrane the easiest
non-polar particles
slows down or stop a cellular process
negative feedback
what are cilia
they propel the cell through its environment
made of stacks of thylakoids
granum
what happens to a cell in a hypertonic solution
it shrinks
the movement of molecules across a membrane using chemical energy
active transport
conditions that go beyond what cells can handle
limit of tolerance
contains digestive enzymes that digest food, kill bacteria and viruses and recycles old cell parts
lysosomes
keeps tugor pressure in a plant cell by collecting and storing water
central vacuole
if a cell is placed in a solution that has a higher concentration of solute, the cell is said to be.....
hypotonic
molecules can move through the cell with the help of transport proteins
dynamic equilibrium
the balance of changes and motions in a system
builds parts for the cytoskeleton
centrosomes
a type of colorless plastid, stores starches, lipids, and proteins
leucoplast
ocean water is known as a ......... solution
factors that determine whether a particle can be passively transported across a cell membrane
particle size, particle shape, particle polarity, membrane composition