concept 2
simple diffusion
the spreading out of molecules across a membrane until equilibrium
What is Osmosis
The simple diffusion of water across the cell membrane
Molecular pumps?
when cells use energy to pump molecules across the membrane
what happens when the sperm is fertilized
that becomes Zygote which goes through the cell division repeatedly
what is an organism
one individual member of a species
What is Equilibrium
equally concentrated on both sides of the membrane
high water concentration means what solute concentration
low solute concentration
what does molecular pumps help with
this allows a cell to concentrate key molecules within the cell or remove waste quickly from the cell
what do specilized cells become
they become tisues-organs-organ systems
what is the organ system
set of organs working together for a common function
a transport protein helps to facilitate the the diffusion of molecules that normally couldnt pass through the cell membrane
Hypertonic solution?
net movement of water out of cell which makes the cell shrivil
What do Endocytosis use?
what are stem cells
undifferentiated cells that become differentiated into one or more types of specialized cells
what is an organ
set of tissues working together for a common function
they can act as a channel or a carrier
Hypotonic solution
net movement of water into the cell which makes the cell swell (go big)
What to Phagocytosis
cell eating - engulfd solids into the vesicles and digests them
what are Embryonic stem cells
cells that have never differentiated
what is tissue
group of cells working together for a common function
Is Facilitated diffusion active or passive
it is active
Isotonic solution
identical amount of water to cells cytoplasm which makes the cell stay the same
"Digests" - cell engulfs liqueds into vesicles and digests them
what are adult stem cells
they are cells found in adult bone marrow
what is a cell
most basic unit of life that has all the characteristics of life