Osmosis and Homeostasis
A colonial organism
A group of more or less simular cells that live together in closely connected groups. example: Volvox
Chemical celluar signals change speeds, Why?
Can speed up or slow down the activities of the cells that receive and can change what the cells function is.
What does cell specialization mean
Each cell depending on one another to perform certain functions
Where are the receptors located
On the cell membrane, although the receptors for certain types of signals are inside the cytoplasm.
What completes a seriers of specialized tasks
Organs
many cells have water channel proteins known as
aquaporins.
proteins in the cell membrane act as
carriers or channels.
levels of multicelluar organization
cells make-up tissue then organ and organ make-up organ systems
Water moves quickly through a cell because it is surrounded by
fresh water causing it to swell.Eventually the cell may burst.
What is the process endocytosis
The membrane forms a pocket engulfingthe particle and pulls it into the cell
Osmotic pressure
The net movement of water out of or into a cell excerts a force known as this
In a plant cell an increase in water within the cell causes greater pressure describe the plant cell.
The plant cell become rigid
what has heppened when a cell is Hypotonic
The solution has a lower concentration than the cell. A net movement of water molecules causing it to swell
what has heppened when a cell is Hypertonic
The solution has higher concentration inside the cell. A net movement of water molecules causing it to shrink
An Hypotonic solution state is:
The solution is less concetrated outside the cell more than the inside.
An Hypertonic solution state is:
The solution is more concetrated outside the cell more than the inside.
How do cells balance the intake and loss of water
Through the use of osmosis.
vacuoles store materials like water.salts,proteins,and sugar.
a shrunken central vacuole does not give the same support to a cell as a full one.
What is Amoebus, describe the process
active transport, uses energy, an extension of the cytoplasm engulfs the particle and pulls it intom the cell.
how do yeast or unicellar fungi play an inportant role for larger organisms
breaking down complex nutrients which makes them avaialablle for other organisms.
Cells almost always have salts, sugars, proteins and other molecules that cause cells to be
hypertonic to fresh water
Cells communicate using what
in large organism communicate by means of chemical signals that are passed from one cell to another.
What part of the cell does active transport take place
membrane and protein pumps facilitate the transport of molecules, ions and proteins
Phagocytosis
process in which extensions of cytoplasm surround and engulf large particles and take them into the cell
An isotonic solution state it:
retains it's normal shape, does not experience osmosis
An Hypertonic solution causes a plant to
shrink and wilt
what has happened when a cell becomes Isotonic
the concentration of solutes is the same same inside and outside the cell. Water molecules move equally in both directions
large molecules cant pass through the pumps they must move side to side through vesicles
the contents of the vesicles are forced out of the cell.
a group of cells that perform a particular function is
tissues
What is the job of cell receptor
what the chemicals sent from the signaling molecule bind to.
Explain homeostasis
which is to mainatain a constant internal chemical and physical conditions .
Explain a celluar junction function
Some celluar junctions hold cell firmly together, others perform chemical connections. Others junctions allow small molecules carrying chemical messages.
