1.2 Epithelium and Glands

Question 1

Cell junctions found on the lateral domains of the epithelial cells

Answer 1

Cell-to-cell adhesions/junctions

Question 2

Main proteins in the Zonula occludens

Answer 2

Occludin and claudin

Question 3

Forms a belt or tight junction surrounding the apical portion of the epithelial cell; no space between cells
Important in organs that specialize in concentrating its content;
Materials may not pass paracellularly, only transcellularly

Answer 3

Tight junction / Zonula Occludens

Question 4

Types of Anchoring junctions

Answer 4

Zonula adherens
Fascia adherens
Desmosome or macula adherens

Question 5

Protein used in zonula adherens

Answer 5

E-cadherin

Question 6

Electrolyte used for attachment in zonula dherens

Answer 6

Calcium

Question 7

Strongest attachment between epithelial cells;
Prevents sloughing off during friction;
Attached to intracellular attachment plaque through intermediate filaments

Answer 7

Desmosome

Question 8

Proteins in gap junctions or communication junctions

Answer 8

Connexions

Question 9

Supports basal lamina and connects to the laminin through proteins

Answer 9

Type IV collagen

Question 10

Core component of cilia

Answer 10

microtubules

Question 11

Arrangement of microtubules in cilia

Answer 11

a central doublet and 9 doublets at the periphery

Question 12

Causes the motile function of cilia

Answer 12

Dynein arms

Question 13

Core component of microvilli

Answer 13

Actin filaments

Question 14

Longer and more slender than cilia

Answer 14

Stereocilia

Question 15

Main protein of sterocilia

Answer 15

Actin filament

Question 16

Path of release through bloodstream (type of glands)

Answer 16

Endocrine

Question 17

Path of release is through ducts (type of gland)

Answer 17

Exocrine

Question 18

Type of gland where the target cell is adjacent

Answer 18

Paracrine

Question 19

Type of gland according to mechanism of product release:

Product is released through exocystosis

Answer 19

Merocrine

Question 20

Type of gland according to mechanism of product release:

The cell dies when the product is released

Answer 20

Holocrine

Question 21

Type of gland according to mechanism of product release:

Apical portion of the epithelial cells is released with the product

Answer 21

Apocrine

Question 22

Specialized epithelial cell found at the basal part of the epithelium, hugging the basal cells of the acinus; has contractile elements in the cytoplasm

Answer 22

Myoepithelial cell

Question 23

Major protein component of basal lamina; a protein in lace-like configuration)

Answer 23

Laminin