4 Basic Tissue Types

Question 1

What is the function of glandular epithelial?

Answer 1

Secretion, from glands

Question 2

Explain endocrine epithelia

Answer 2

Endocrine epithelia secrets hormones directly into blood stream

Question 3

Describe exocrine epithelial

Answer 3

Exocrine epithelia secrets hormones into ducts or onto surfaces

Question 4

What are the 2 types of epithelia tisssue?

Answer 4

Covering and lining , glandular

Question 5

What are the 5 cell junctions in epithelia tissue?

Answer 5

Truncation, adherents junction, gap junction, desmosomes, hemidesmosomes

Question 6

Describe tight junctions and their fucntion

Answer 6

Tight junctions are located at the top of the cell, cells are bonded together by Claudins and occludins. The the junction is electrically tight providing sealing and protective factors, also selective barrier/ semi permeable

Question 7

Describe the adherents junction and its function

Answer 7

The adherenes junction has a gap which is spanned by CADHERIN which links to care in of the other cell. The catering binds the cadherin to actin

Question 8

Describe the gap junction and its function

Answer 8

The gap junction is where 2 connexon of different cells join and open a communication channel, known as hydrophilic channel

Question 9

Describe desmosomes and their function

Answer 9

Desmosomes have a gap between plaques of cell membranes. The gap is spanned by cadherin. The cadherin links to desoplankin of the other other cell. The desmoplankin binds the cadherin to keratin.

Question 10

Describe hemidesmosomes and their function

Answer 10

Hemidesmosomes connect cells to the basement membrane (BM). The gap between the cell and BM is spanned by intergrin which binds to lambing of BM

Question 11

What makes up the basement membrane

Answer 11

Basal lamina and reticular lamina

Question 12

What is basal lamina made of?

Answer 12

Make from produces secrets by epithelia tissues.

Question 13

What is reticular lamina made of

Answer 13

Made by secretions of fibroblasts in the connective tissue

Question 14

What are the functions of the BM

Answer 14

Acts as physical barrier, diffuses oxygen and nutrients from CT to epithelia, supports overlaying epithelia, provides a surface for epithelial cells to migrate during growth/wound healing.

Question 15

What are the ABCD warning signs of melanoma and what increases the risk?

Answer 15

Melanoma is dangerous once it has penetrated the BM
A- asymmetry
B- border
C- colour
D- diameter

Question 16

What are the layers of epithelia called?

Answer 16

Simple, stratified, pseudostratifiedd

Question 17

What are the shapes of epithelia cells?

Answer 17

Squamous, cubiodal, columnar, transitional

Question 18

What are extra features of epithelia cells

Answer 18

Cilia, microvilli, keratinised

Question 19

What are the 3 types of muscle tissue?

Answer 19

Skeletal, cardiac, smooth