Grinnell

How biological research differsFrom a history class

Why Cell Biology is Different From Histology

CBI Liver Cell ‘View 4’

CBI Liver Cell ‘View 5’

Electron Micrographs: What can we see and tell?

Live images: What can we see?

CBI 1.1: Dancing Keratocyte

What do these two approaches tell us about cells their properties and their components?

Biological Membranes

A) Where are they found?

B) What are their functions?

C) What are their major components?

LipidsAll lipids have same general chemical structure: polar head group and nonpolar hydrocarbon tails

Types of lipids?

Types of lipids in biomembranes?

Fig 10-2 see also CBI 10.2

Cholesterol

Fig 10-10: CBI 10-2

How do lipids form membranes?Combination of shape and packing

Role of hydrocarbon tails?

What is the role of cholesterol?

Why is the structure of a biological membrane important?

Fig 10-14

Why is a biological membrane more similar to a house than it is to a fence? (Think about on break)

What else is in biological membranes?

Proteins

What is a protein? (in general terms)

What functions do they perform?

Membrane Proteins

Transmembrane/Integral or Peripheral

What functions would require each category of membrane protein?

Covered:

Biological membraneswhere they are foundtheir chemical componentshow the components are arrangedproperties and functions of membranes

Next:

Membrane dynamics: Fluid Mosaic ModelLipid Rafts

Types and functions of organelles

Introduction to Graves’ Disease