hierarchy of organization cells → tissues → organs → organ systems → organism

of 15/15

Post on 18-Jan-2016

239 views

Category:

Documents

0 download

Embed Size (px)

TRANSCRIPT

Cell Specialization

Hierarchy of organization

Cells Tissues Organs Organ Systems OrganismWhat is cell specialization?A less specialized cell (stem cell) becomes a specific cell.Ex: nerve cell

What are the difference in stem cells?Embryonic Stem CellsThese are the stem cells found in the embryo just after fertilization occurs.These stem cells undergo changes to become all the various cells in your body.Adult Stem CellsAn undifferentiated cell, found among differentiated cells in a tissue or organ that can renew itself and yield some or all of the major specialized cell types of the tissue or organDifferent than embryonic because it can only be a cell of that organ or tissue.PracticeWhat kind of cell in the human body might have a ton of mitochondria in it? ___________________What cellular structures might the enzyme-producing cells in the pancreas contain a lot of? _____________________*Hint: What is an enzyme?

How is the structure of each cell related to its function?

Nerve cellSperm cellMuscle cellRed blood cell

What causes cell differentiation?All cells are controlled by ___?___For each specific cell a different section of DNA is turned on allowing it to be specific for its job.

ReflectionWhat if a mutation caused the sperm cell and the red blood cell to change shapes? How would this affect the cells ability to do their job?What impact would this have on future cells they created?How do cells communicate?What process takes place as you burn yourself?

Nerve cell sends signals to muscle cells to move your hand away from the flame!

Sending and receiving signalsHormones: Chemical signal released by cell to send a message

Receptor proteins: Proteins that receive chemical messages