Cell Physiology
How cells work
Endocytosis
Exocytosis
Endo- to take in
Exo- to let out
Phagocytosis“cell eating”
white blood cells
Pinocytosis“cell drinking”
Plasma Membrane
1.
2.
3.
Made up of Lipids
Polar head and non-polar tail
“Fluid Mosaic Model”
Cell Membrane
Phospholipids
2. Proteins
a. receptor
b. transmembrane
3. Cholesterol
1.
Transport into Cells

Passive- no energy (ATP)
Diffusion and Osmosis

Active- energy needed (ATP)
Uses proteins embedded in the membrane
“Pumps”
Cell Division


Mitosis- All body cells reproducing
1 cell (46 chromosomes)  2 cells (46 ch)
for growth and repair
lifelong- conception to death
Related to tumors and cancer
Meiosis- Sex cells- produce egg and sperm
for reproduction
begins at puberty
1 cell (46 chromosomes)  4 cells (23)
Mitosis
Meiosis
1 cell- DNA replicates- divides – divides again
46 --
92
--46 --
23(egg/sperm)
Cell Division Animation
Using GFP to Study
Cell Division
1.
2.
What is a stem cell?
What is GFP?
You tube video: “Growing Nerve Cells”