Session 4: Cells in tissues and epithelial Flashcards
describe how cells are held together at the molecular level
describe the structural relationships between the epithelia and closely associated tissues (glands, underlying connective tissue (lamina propria and muscularis mucosae) comprising the gastrointestinal, urinary, and respiratory mucosae
discuss, for the gastrointestinal, urinary, and respiratory mucosae, how the structure of their constituent tissues is related to the function of the mucosa
Tight junctions:
Adhesion junctions:
Desmosome:
Gap Junctions:
Hemi-desmosomes: basal surface
Focal adhesions - basal surface
Integrins:
Summarise and talk about the epithelial “tissue glue”:
Summary cells to tissues:
Which structure in the lateral surface of the gut epithelia transiently opens in paracellular transport?
tight junctions
Which plasma membrane structure uses actin filaments as opposed to intermediate filaments in order to anchor the epithelial cell to its basal lamina?
Focal adhesion plaque
A 27 year old woman has undergone IVF treatment and had her blastocyst inserted 5 days ago. Her pregnancy test kit indicates that she is not pregnant and the blastocyst has failed to attach to the endometrium.
Integrin
What is the mucosal membran and outline its general functions
Lysosomes destroy bacteria
stop pathogens, stop tissue dehydration, lubrication
GI tract layers:
GI tract contains (oesophagus, stomach, jejunum, large intestine)
Mucosa
submucosa
Muscularis externa (inner circular smooth muscle, outer longitudinal muscle)
Serosa
Composition of mucosa of GI tract:
epithelium, lamina propria (contains connective tissue) and muscularis mucosa
Gi tract function of mucosa:
From book absorption, secretion, protection.
GI tract read page 642 test yourself
-
