November 5, 2013 Turn in 5.3 and 5.5 Reinforcement.

Leave out vocab & PN to be stamped.

Fill out the “Know” and “Want to Know” sections of your KWL chart.

Stem Cells We have over 200 types of cells in our bodies

that all have specialized jobs.

..But we start out as a single-celled, fertilized egg.

How do we go from one cell to hundreds of types of cells?

Stem Cells Stem cells are cells that have the

unique ability to develop into a variety of specialized cells.

Stem cells develop into specialized cells through a process called cell differentiation.

Stem Cells Stem cells will differentiate depending

on:1. The environment they’re in, and2. Their location.

Outer = Exoderm Middle = Mesoderm Inner = Endoderm

Stem Cell Classification Stem cells can be classified in 3 ways:

Stem Cell Classification Stem cells can also be classified by their

origin:1. Somatic stem cells are found in

developed humans (children and adults) and in umbilical cord blood.

2. Embryonic stem cells are taken from a cluster of undifferentiated cells in a 3-to-5-day-old blastocyst.

Stem Cell Classification Blastocysts are only used to create

embryonic stem cells when donated by patients undergoing in-vitro fertilization treatments.

Stem Cell Research Currently used to treat a variety of

diseases, including leukemia and lymphoma.

Incredibly hard to do! Stem cells want to differentiate & will do

so spontaneously.

Activity 14 Read the information together.

Complete the activity as a pair.

Brainstorm answers to questions #1-4 on your whiteboards.

Explain answers to your partner orally. “I don’t know” is not an acceptable answer!

Activity 15 Add any additional “Want to Know”

information to your KWL chart.

Brainstorm answers to questions #1-2 on your whiteboards.

Explain answers to your partner orally. “I don’t know” is STILL not an acceptable

answer!

Complete the “Learned” section of your KWL.

Homework Study for quiz on Mitosis

Section 6.1: Vocab PowerNotes Reinforcement