Class Notes (838,409)
Canada (510,881)
Langara College (1,809)
Biology (118)
BIOL 1175 (37)
H.Hun (24)

Two Major types of cells in all living organisms and cell structure, 10-18-12.docx

4 Pages
Unlock Document

BIOL 1175

Two Major types of cells in all living organisms and cell structure 10-18-12 Prokaryotic cells thought to be the first cells to evolve lack nucleus represented by bacteria and archaea (2 domains of life) smaller circular Eukaryotic cells (third domain of life) have a nucleus that houses DNA many membrane-bound organelles -coiled, linear strand Where did eukaryotic cells come from? The endosymbiotic theory Cells have specialized functions Movement in and out of cell What does the cell membrane do? 1, receiving information 2. import and export capacity for movement and expansion Plasma membrane - phospholipid bilayer - fluid mosaic model - contains cholesterol for support - contains carbohydrate on proteins and lipids on outer layer selectively permeable: membrane allows somethings in while keeping other substances out Diffusion: random movement movement of molecules from a higher concentration to a lower concentration Osmosis: movement of water across a selectively permeable membrane from a region of high water concentration to a region of low water concentration Hypertonic: solution have more solute than the inside of the cell Less H20 outside Water flows “downhill” out of the cell cell shriveling eg: very high salt concentration in surrounding fluid, water travels out of cell to dilute Hypotonic: solutions have less solute than the inside of the cell
More Less

Related notes for BIOL 1175

Log In


Join OneClass

Access over 10 million pages of study
documents for 1.3 million courses.

Sign up

Join to view


By registering, I agree to the Terms and Privacy Policies
Already have an account?
Just a few more details

So we can recommend you notes for your school.

Reset Password

Please enter below the email address you registered with and we will send you a link to reset your password.

Add your courses

Get notes from the top students in your class.