Answer the Following Questions s1

GO GO STEM:

Go To Link: http://learn.genetics.utah.edu/content/stemcells/sctypes/

Answer the following questions:

BLOOD CELL NICHE:

1. ______become damaged over time and need to be replaced often.

2. The stem cell niche responsible for producing blood cells is inside the bones, in the ______.

3. Pull the handle to release signals that will ______the stem cell.

4. The stem cell divides. One copy stays in the ______, the other will become a ______

5. The ______activate genes that will transform the stem cell.

6. As the new red blood cell matures, it makes lots of ______, the ______that carries ______to tissues in your body.

7. To complete the transformation from stem cell to red blood cell, the ______and most of the other ______are ______.

8. This red blood cell will live for about ______months in the bloodstream before a new red blood cell takes its place.

9. ______is made up of many different cell types that do a variety of jobs. Stem cells in this niche give rise to many different kinds of cells!

What is function of WHITE BLOOD CELL

What is function of RED BLOOD CELL

BRAIN CELL:

1. ______send and receive ______in your brain. Your body makes most of its neurons before birth. But there are at least two regions where stem cells continue to give rise to new neurons: the hippocampus, a brain region important for memory; and the olfactory bulb, which powers your sense of smell.

2. Signals are ______that will ______the stem cell.

3. The stem cell ______. One copy stays in the niche, the other will become a new ______

4. The signals ______that will transform the stem cell.

5. ______come in many shapes and sizes. Projections extending from the cell ______and ______signals to and from other neurons.

Intestinal

1. Inside the intestine are tiny finger-like projections called ______that ______nutrients and move food through the digestive system.

2. The cells on the surface of the villi only ______a ______before they are shed and replaced

3. This stem cell niche sits inside ______at the base of the villi.

4. The stem cell ______. One copy stays in the niche, the other will become a ______cell for the intestine.

5. The signals activate ______that will ______the stem cell.

6. The new cell will make its way up from the crypt to the villus. As it migrates it further ______to perform its new function: absorbing nutrients from food passing through the gut.

BONE CELL:

1. ______are living organs filled with busy cells.

2. Stem cells in this niche maintain and ______our bones.

3. The stem cell divides. One copy stays in the ______,the other will become a ______.

4. The signals ______that will ______the stem cell. These signals work ______during childhood and adolescence, a time of dramatic bone ______.

5. This stem cell will become an ______. Osteoblasts build and repair bones by ______a special kind of extracellular matrix. 6. One important ______in this matrix is ______, the most abundant protein in the human body. 25% of the protein in your body is collagen!