Cells

Three Main parts to an Animal Cell 1. Plasma Membrane2. Cytoplasm3. Nucleus

The Nucleus Controls the activity

of the cellContains the cells

genetic informationAre NOT found in all

types of cells yet some cells have severalWhy?

CytoplasmIncludes the cytosol

and organelles

The MitochondriaSite of ATP

productionHas two membranes

Outer is smoothInner has cristae

Org

anel

le C

hart

Organelles http://interactivesites.weebly.com/cells.htmlhttp://

fau.pearlashes.com/anatomy/Heandouts/Study%20Guide%20Cell%20Structures%20of%20Animal%20Cells.htm

http://www.cellsalive.com/cells/3dcell.htm

Plasma Membrane(AKA Cell Membrane)

Allows certain substance into and out of the cell

Made up of: Lipid bilayerCholesterolGlycolipids

Integral and peripheral proteins

Active Transport vs Passive TransportThis is how cells

transport molecules across the membrane to maintain homeostasis

Which type of transport requires an input of energy?

Types of Passive TransportDiffusion- moves from

an area of high concentration to an area of low concentration.

Simple vs facilitated diffusionSimple diffusion

allows for lipid soluble substance to cross

Facilitated diffusion membrane proteins assist in getting molecules across Via channels or carriers

Diffusionhttp://highered.mcgraw-hill.com/sites/0072495855/student_view0/chapter2/animation__how_diffusion_works.html

Ion Channels Ions are able to

move into and out of the cell when gates are opened and closed. How does the

channel do this?

Facilitated diffusion http://highered.mc

graw-hill.com/sites/0072495855/student_view0/chapter2/animation__how_facilitated_diffusion_works.html

Osmosis

The diffusion of water across a membraneIs this passive or

active transport?

Permeability of Cells LabThings you should know: Iodine turns purple black in the presence of a

starchYour hypothesis for part B should address

each solutionYou should read your background to create

your hypothesis for Part B or maybe this will help youhttp://www.youtube.com/watch?

v=HqKlLm2MjkI

Osmotic MovementReview

Osmotic Condition

Direction of water

movement

Effect on the cell

Picture

Isotonic

Hypotonic

Hypertonic

The Na+K+ PumpAn integral protein

that brings in K+ ions and kicks out Na+ ionsIons slowly leak

back and the pump must continually maintain the balance

Is this an example of active transport or passive transport?

• http://www.youtube.com/watch?v=GTHWig1vOnY

• http://www.brainpop.com/science/cellularlifeandgenetics/activetransport/

Cell Transport Analysis1. Based on what you learned in class

today, was this an example of diffusion, osmosis, endocytosis, exocytosis or phagocytosis? Explain your answer.

2. Describe how white blood cells attack germs in the body. Which type of cell transport is this an example of?

3. Why do cells need to use active transport?

Cell Raphttp://

www.youtube.com/watch?v=jtf7MKDBF60http://www.youtube.com/watch?v=-zafJKbMP

A8