Differentiation

DifferentiationMs. Russo

Ready, Set, Go!Journal Prompt => One of the most important questions kids get asked is “what do you want to be when you grow up?”

How do you think cells figure out what they will be when they ‘grow’ up. For example, how does a blood cell become a blood cell, a skin cell become a skin cell, etc?

I grew up to become a doctor!

Ready, Set, Go!View => http://www.youtube.com/watch?v=749-fohVY0M

Discuss => What gives a stem cell ‘superpowers?’

Agenda

1. Ready, Set, Go!2. Cell Demo3. What’s Your Job?4. Journal Close

Objectives

• Describe the basic structure and function of various types of cells (7.4.2)

• Describe the levels of organization in organisms (7.4.3)

• SWBAT draw a sketch illustrating how cells become differentiated

• SWBAT explain the specialized job of at least one type of cell

Cell Demonstration

• Demo 1 - Embryonic Differentiation

• Demo 2 - Adult Stem Cell Differentiation

Follow Directions

Listen for Transitions

What’s Your Job?• Now that each of you have grown up and become a specialized cell, you have a specific job to do. Just like the little girl below grew up to become a doctor with a specific job, you’ve grown up to become a specialized heart, skin, nerve, or blood cell.

I grew up to become a doctor!

We just learned that when a cell grows up, it becomes a specialized type of cell. But guess what! It doesn’t stop there. Like doctors, cells can be broken down into even further by their specialized job task. How many types of doctors can you think of?

Example 1:

A heart cell is a specialized type of muscle cell. The formal name for muscle cell is myocyte. Heart cells are cardiac (meaning heart) myocytes.

Example 2:

A skin cell is a specialized type of epithelial cell. The formal name for muscle cell is myocyte. Heart cells are cardiac (meaning heart) myocytes.

Muscle Cells

Epithelial Cells

What’s Your Job?The Nerve

Cell

Blood Cells

Interactive Work: Links to Apps

Nerve Cells:http://www.planet-science.com/categories/over-11s/human-body/2011/05/what's-in-a-nerve.aspx

Blood Cells:http://www.e-learningforkids.org/Courses/Liquid_Animation/Body_Parts/Blood/

http://www.cellsalive.com/myocyte.htm

Heart Cells (Cardiac Myocytes):

http://askabiologist.asu.edu/epithelial-cells

Skin Cells (Epithelial Cells):

Interactive Work: Graphic Organizer

Cell Type:

Sub-types: Function: Reminds Me Of...

That’s a Wrap

Journal Close (Next Day Entrance Slip)

1. Draw a sketch of how a cell differentiates, listing the stages in order beginning with fertilized egg and ending with differentiation

2. In two sentences, describe the specialized job that your cell does