Lecture 3 Old Notes: Tandler Flashcards
All surfaces of the body, internal and external, are covered by what type of tissue?
Epithelial
What are the three listed functions of epithelium?
Absorption, secretion, protection
Is connective tissue always above or below epithelium?
Beneath
All structures in connective tissue (never/always) enter sheet of epithelium
Never
What structure lies between the epithelium and connective tissue, which is partially secreted by both of these structures?
Basement membrane
Is the epithelium on top of or below basement membrane?
The epithelia rests on the basement membrane
If epithelia is two cells or more thick, how is it classified?
Stratified
Does every single cell for pseudostratified epithelium touch the basement membrane?
Yes
What type of epithelium lines blood vessels?
Simple squamous
What type of tissue is found in the thyroid gland?
Simple cuboidal
What is the process of orthokeratinization?
The loss of all organelles, including the nucleus
Where do you find stratified squamous epithelium?
Wet areas (i.e. the mouth)
What is special about the lifespan of cells in wet areas? What about their nuclei?
Since the tissue is stratified squamous, the cells don’t die and their nuclei are retained up at the surface of the cell
Where do you find stratified cuboidal epithelium?
In the ducts of sweat glands
Where is transitional epithelium found?
In the renal pelvis and the ureter
What is special about transitional epithelium in regards to the number of cells, and the capacity to stretch?
The number of cell layers can change, and the cells may stretch
For bulk endocytosis, is there coating or no coating of the vesicles? Is it specific or non-specific
No coating on the vesicles, non-specific
For receptor-mediated endocytosis, are the vesicles coated or not? Does it have a way to take in specific molcecules or not?
There is a coating, and the endocytotic vesicles have receptors for specific molecules
Insulin demonstrates what type of endocytosis?
Receptor-mediated endocytosis
What structure allows epithelial cells to increase their efficiency of absorption?
Cilia
T/F every living cells has glycocalyx
True
What is the function of the glycocalyx, in reference to it’s location on the surface of cells?
Plays a part of the recognition mechanism
What is the protective function of glycocalyx in the gut?
It prevents bacteria from touching the plasma membrane, and this is protective
What three components comprise the glycocalyx?
Fuzz coat (cell signaling), intercellular cement, portion of the basement membrane
