3.2.29 - Stem Cell Research

Question 1

Stem cells can divide to produce cells that can differentiate into which of the cell listed:
brain cells, muscle cells, blood cells, all of these answers are correct

Answer 1

all of these answers are correct

Question 2

What’s one thing stem cells serve for the body?

Answer 2

They serve as a repair system.

Question 3

How many tissue layers does a stem cell have?

Answer 3

3

Question 4

In multicellular organisms few of the cells have specific functions or jobs. True or False.

Answer 4

False

Question 5

In the blastocyst stage of an embryo, the embryo only consists of about ___ cells.

Answer 5

100

Question 6

The blastocyst stage of the embryo occurs at about how many days old?

Answer 6

4-5 days old

Question 7

Stem cells can be found in all embryos. True or False.

Answer 7

True

Question 8

Define Potency

Answer 8

The ability to differentiate into different cell types

Question 9

Are stem cells specialized?

Answer 9

No

Question 10

What two main categories can stem cells divide into?

Answer 10

They can either be unspecialized or be specialized (turn into a muscle cell, brain cell, etc)

Question 11

How do stem cells serve as a repair system for the body?

Answer 11

They divide to create cells to replace damaged tissue.

Question 12

Early embyronic cells are called what?

Answer 12

Totipotent stem cells

Question 13

Define totipotent

Answer 13

lit = having unlimited capacity

Question 14

What does totipotent refer to?

Answer 14

The cell’s ability to form an entire human organism

Question 15

What are most of the cells that exist in the embryo during the blastocyst stage?

Answer 15

Pluripotent

Question 16

What cells will eventually differentiate into all 3 layers of the embryo?

Answer 16

Pluripotent

Question 17

What are the 3 layers of the embryo?

Answer 17

Ectoderm, endoderm and mesoderm

Question 18

How many different types of cells are there in the human body?

Answer 18

220

Question 19

What is the similarity and difference between totipotent and pluripotent.

Answer 19

Totipotent can make all cells. Pluripotent can make most cells (sort of all cells but not all at once). Pluripotent aren’t elastic enough to make a whole embryo. They’re more used for making each layer of the embryo

Question 20

What type of somatic stem cells are usually found in adults?

Answer 20

Multipotent

Question 21

Define multipotent

Answer 21

these cells can differentiate into a few closely related types of cells

Question 22

Define Embryo

Answer 22

an unborn or unhatched offspring in the process of development, a fertilized egg

Question 23

Stem cell research is controversial. True or False

Answer 23

True