Introduction to Cells

How you started life as one cell
…and what happened from there (cell differentiation)
…functions of various cells in your body

Prokaryotic cells vs eukaryotic cells

The cell membrane…
…demonstration using sandwich baggies
…why everything needs a membrane

Homework:
•

The Plasma membrane (Handout)

Phospholipids of the membrane
…a basic model (beach ball w/2 strings)
…Hydrophobic tails vs Hydrophilic head

The Fluid Mosaic Model

Homework:
•

Video Analysis Sheets on:
…"Cells : Basic Unit of Life"
…" Cycles of Life : Secrets of the Cell"


Homework:
•

Membrane proteins - structure and function (on the handout)
…Channel proteins
…Receptor proteins
…Marker proteins -- a short talk about your immune system (organ transplants)

Homework:
• Read pp 74-85 (Organelles)

Handout: "Animal vs Plant Cells"
…Complete table with organelles labelled in each drawing
…Some drawings contain the same organelle

Get out textbooks and, on the back of the sheet, take notes on the different organelles listed on the front.

Homework:
• Complete the remaining organelle descriptions

Parts of the Microscope

How to complete Plate Drawings for the Lab

Microscope Lab (Day 1)

Review of how to set up your plate drawings

Letter "e"
…put in on the slide/stage so you can read it
…draw at 40x and 100x total magnification

Epithelial Cells (Cheek)
…drop of methylene blue on slide
…rub toothpick inside of cheek, then in methylene blue drop
…draw at 100x and 400x total mag
…on 400x drawing, label: Nucleus, Membrane, Cytoplasm

Microcscope Lab (Day 2)

Plant Cell (Onion Epidermis)
…get a sample from me
…drop of water on slide, then coverslip
…draw at 100x and 400x total mag
…at 400x, label: Cell wall, Cell membrane, Cytoplasm, Nucleus

Organelles of Animal and Plant Cells

Finish-up any cell organelles

Diffusion

Osmosis -- Diffusion of water across a cell membrane
…Review of solutions (What you already know about Kool-aid)
…How much water is in a solution?
…Another example -- relating solute concentration to placing things in a full bathtub
…Hyper-, Iso-, and Hypotonic -- what it means

Osmosis Lab

Qualitative (Onion Cell) -- On the same plate draw at 400x:
…cells with distilled water (top drawing)
…cells exposed to salt water (bottom drawing)

Quantitative (Potato)
…Get a core of potato and mass it
…Place in salt solution for 20 minutes
…Mass it after soaking

Hand out and work on Unit Review

What work you have done will be collected at the end of the period.

More on Osmosis

What happened in Wednesday's lab

Finish up Osmosis
…Tonicity

Passive Transport

Facilitated Diffusion

Active Transport

Endo-and Exocytosis

Start Reviewing for Thursday's Exam

Unit Review Due

In-class Unit Review

EXAM 4 -- Cells Unit

Pass Back and Review Exam 3 -- Organic Compounds

Pass Back and Review Exam 4 -- Cells