Lecture 4- Where do cells come from? Flashcards
How do you increase the amount of amino acids to be removed from the intestine?
Increase the surface area
How to increase the surface area of intestine?
- organ is long
- it has folds
- it has villus and microvillus
Villus
little fingers made of many cells
The more cells we have, the more nutrients can be brought into our bodies
true or false
True
What are the 4 types of cells?
- Absorptive cell
- Goblet cell
- Paneth cell
- Enteroendocrine cell
Absorptive enterocytes (Absorptive cell)
~ 90%
most common: gut cells
import nutrients
Microvilli are filled with:
A. actin filaments
B. intermediate filaments
C. collagen
D. cellulose
E. microtubules
A. actin filaments
Goblet cells
~ 10%
export protective mucus into gut
shape= goblet
Paneth cells
< 1%
export anti-bacterial proteins into gut
discovered by Paneth
Enteroendocrine cells (EECs)
< 1%
export hormones into blood (=endocrine cell)
“gut is empty”
“gut is full”
How does cell replication replace the cells that are lost when they’re at the tip?
Stem cells can either:
reproduce
mature
Stem cells reproduce and make all other different types of cells
true or false
TRUE
What is the first decision or the first type of cell that stem cells turn into?
Absorptive enterocytes
What is the second decision or the second type of cell that stem cells turn into?
Enteroendocrine cells (EECs)
Enteroendocrine cells can turn into what type of cells?
Goblet cells and Paneth cells
