Session 4: Cells in tissues and epithelial

Question 1

describe how cells are held together at the molecular level

Answer 1

Question 2

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

Question 3

discuss, for the gastrointestinal, urinary, and respiratory mucosae, how the structure of their constituent tissues is related to the function of the mucosa

Question 4

Answer 4

Question 5

Tight junctions:

Answer 5

Question 6

Adhesion junctions:

Answer 6

Question 7

Desmosome:

Answer 7

Question 8

Gap Junctions:

Answer 8

Question 9

Hemi-desmosomes: basal surface

Answer 9

Question 10

Focal adhesions - basal surface

Answer 10

Question 11

Integrins:

Answer 11

Question 12

Summarise and talk about the epithelial “tissue glue”:

Answer 12

Question 13

Summary cells to tissues:

Answer 13

Question 14

Which structure in the lateral surface of the gut epithelia transiently opens in paracellular transport?

Answer 14

tight junctions

Question 15

Which plasma membrane structure uses actin filaments as opposed to intermediate filaments in order to anchor the epithelial cell to its basal lamina?

Answer 15

Focal adhesion plaque

Question 16

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.

Answer 16

Integrin

Question 17

What is the mucosal membran and outline its general functions

Answer 17

Lysosomes destroy bacteria

stop pathogens, stop tissue dehydration, lubrication

Question 18

GI tract layers:

GI tract contains (oesophagus, stomach, jejunum, large intestine)

Answer 18

Mucosa

submucosa

Muscularis externa (inner circular smooth muscle, outer longitudinal muscle)

Serosa

Question 19

Composition of mucosa of GI tract:

Answer 19

epithelium, lamina propria (contains connective tissue) and muscularis mucosa

Question 20

Gi tract function of mucosa:

Answer 20

From book absorption, secretion, protection.

Question 21

GI tract read page 642 test yourself

Answer 21

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