Cell Surface and Extracellular Material

Question 1

Bands of fusion between adjacent cell membranes

Answer 1

Tight junction (zonula occludens)

Question 2

Function: Prevents intercellular transport

Answer 2

Tight junction (zonula occludens)

Question 3

Aggregation of filaments facing each other in adjacent cells

Answer 3

Zonula adherens

Question 4

Function: Continuous adhesion belt of filaments

Answer 4

Zonula adherens

Question 5

Button-shaped points of contact between cells

Answer 5

Desmosome

Question 6

Function: Cell-cell adhesion: cytoskeletal attachment

Answer 6

Desmosome

Question 7

Very narrow intercellular space

Answer 7

Gap junction (nexus)

Question 8

Function: Intercellular communication

Answer 8

Gap junction (nexus)

Question 9

Slender finger-like projection, central actin filaments

Answer 9

Microvillus

Question 10

Function: Increased surface area

Answer 10

Microvillus

Question 11

Hair-like extension, central microtubule 9 + 2 arrangement

Answer 11

Cilium, flagellum

Question 12

Function: Whip-like movement of fluid or whole cell propulsion

Answer 12

Cilium, flagellum

Question 13

Slender, hair-like tufts, central core filaments

Answer 13

Stereocilium

Question 14

Function: Immotile; increased surface area

Answer 14

Stereocilium

Question 15

Particulate matter of fibrous proteins, proteoglycans, glycosaminoglycans

Answer 15

Matrix

Question 16

Function: Gel-like material supporting connective tissue fibers

Answer 16

Matrix

Question 17

Cross-striated, slender wavy strands

Answer 17

Collagen fibril

Question 18

Function: Flexibility but resistance to longitudinal forces

Answer 18

Collagen fibril

Question 19

Network of very slender strands (type III collagen)

Answer 19

Reticular fiber

Question 20

Function: Provides structural support and is flexible

Answer 20

Reticular fiber

Question 21

Bundles of microfibrils and amorphous elastin

Answer 21

Elastic fiber

Question 22

Function: Provides elasticity

Answer 22

Elastic fiber