3.2.29 - Stem Cell Research
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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
all of these answers are correct
What’s one thing stem cells serve for the body?
They serve as a repair system.
How many tissue layers does a stem cell have?
3
In multicellular organisms few of the cells have specific functions or jobs. True or False.
False
In the blastocyst stage of an embryo, the embryo only consists of about ___ cells.
100
The blastocyst stage of the embryo occurs at about how many days old?
4-5 days old
Stem cells can be found in all embryos. True or False.
True
Define Potency
The ability to differentiate into different cell types
Are stem cells specialized?
No
What two main categories can stem cells divide into?
They can either be unspecialized or be specialized (turn into a muscle cell, brain cell, etc)
How do stem cells serve as a repair system for the body?
They divide to create cells to replace damaged tissue.
Early embyronic cells are called what?
Totipotent stem cells
Define totipotent
lit = having unlimited capacity
What does totipotent refer to?
The cell’s ability to form an entire human organism
What are most of the cells that exist in the embryo during the blastocyst stage?
Pluripotent
What cells will eventually differentiate into all 3 layers of the embryo?
Pluripotent
What are the 3 layers of the embryo?
Ectoderm, endoderm and mesoderm
How many different types of cells are there in the human body?
220
What is the similarity and difference between totipotent and pluripotent.
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
What type of somatic stem cells are usually found in adults?
Multipotent
Define multipotent
these cells can differentiate into a few closely related types of cells
Define Embryo
an unborn or unhatched offspring in the process of development, a fertilized egg
Stem cell research is controversial. True or False
True