Chap-4

Question 1

Four basic types of tissues found in the organs of the human body?

Answer 1

Epithelial tissue
Connective tissue
Muscular tissue,
nervous tissue

Question 2

__________ are composed of closely aggregated polyhedral cells adhering strongly to one another and to a thin layer of ECM, forming cellular sheets that line the cavities of organs and cover the body surface.

Answer 2

Epithelial tissue

Question 3

What are the principal functions of epithelial tissues?

Answer 3

Covering, lining, protecting surfaces (epidermis)
•Absorption (intestinal lining)
•Secretion ( parenchymal cells of glands)

Question 4

These are large glycoproteins that attach to transmembrane proteins called integrins at the cells’ basal surface and project through the network of type IV collagen

Answer 4

Laminin

Question 5

a short, rod-like protein and a proteoglycan, both of these cross-link laminin to the collagen network and help determine the porosity of the basal lamina and the size of molecules able to filter through it

Answer 5

Nidogen
Perlecan

Question 6

– – – bind epithelial cells to the underlying basal lamina

Answer 6

Hemi desmosomes

Question 7

Major transmembrane link proteins in the Zonula Occludens

Answer 7

Zonula ocludence — tight junction
Occludins ,claudins , ZO proteins

Question 8

Sterocilia small membrane projections with cores of actin filaments that generally function to increase epithelial cells apical surface area for absorption
✔️
✖️

Answer 8

✖️
Crct ans is - microvilli

Question 9

Functions of stratified squamous epithelium ?

Answer 9

Stratified squamous epithelia such as the epidermis cover the body surface, protecting underlying tissues from excess water loss (dehydration) and microbial invasion

Question 10

Basal lamina includes ?

Answer 10

Type IV collagen
Laminin
Nidogen and perlecan