Histology Lab Unit 1

Question 1

basic dye

Answer 1

• binds to basophilic tissue (DNA/RNA)
• hematoxylin

Question 2

acidic dye

Answer 2

• binds to eosiniphilic tissue (proteins + cytoplasmic organelles)
• eosin

Question 3

cilia function

Answer 3

movement

Question 4

flagella function

Answer 4

propulsion

Question 5

microvilli function

Answer 5

Increase SA for absorption

Question 6

heterochromatin

Answer 6

densely packed, stains darker

Question 7

euchromatin

Answer 7

loosely packed, stains lighter

Question 8

simple squamous function

Answer 8

• facilitates movement of mesothelium
• active transport
• secretion

Question 9

simple cuboidal function

Answer 9

covering, secretion

Question 10

simple columnar function

Answer 10

protection, lubrication, absorption, secretion

Question 11

stratified squamos keratinized function

Answer 11

protection, prevents water loss

Question 12

stratified squamos non keratinized function

Answer 12

protection, secretion, prevents water loss

Question 13

stratified cuboidal function

Answer 13

protection, secretion

Question 14

transitional epithelim function

Answer 14

protection, distensibility

Question 15

stratified columnar epithlium function

Answer 15

protection

Question 16

pseudostratifed function

Answer 16

protection, secretion, transport of mucous

Question 17

endothelium

Answer 17

simple squamous epithelium that lines wall of a blood vessel

Question 18

fibroblast

Answer 18

• secretes ECM proteins and ground substance

Question 19

collagen function

Answer 19

structural support, resists stretching

Question 20

elastic fiber function

Answer 20

elasticity

Question 21

loose connective tissue appearance

Answer 21

loose/sparse, found in lamina protia

Question 22

Dense irregular connective tissue

Answer 22

lots of collagen, few cells, in submucosa

Question 23

cartilage function

Answer 23

lubricant, bone development, cushions joints, resists stress

Question 24

perichondrium

Answer 24

band of CT bordering cartilage

Question 25

hyaline cartilage function

Answer 25

reduce friction and protection

Question 26

elastic cartilage function

Answer 26

elasticity

Question 27

fibrocartilage description + function

Answer 27

NO PERICHONDRIUM, chondrocytes are in long isogenous chains - resists compression

Question 28

periosteum

Answer 28

connective tissue containing osteoblasts and clasts

Question 29

Endosteum

Answer 29

lines haversion and volkmann canals

Question 30

intramembranous ossification

Answer 30

osteoblasts develop from embryonic tissue

Question 31

endochondral ossification

Answer 31

hyaline cartilage --> osteoblasts

Question 32

zones of endochondral ossification

Answer 32

- reserve: hyaline - proliferation : chondrocytes undergo rapid mitosis/isogenous chains - hypertrophy: chondrocytes grow - calcification: chondrocytes apoptose and lacunae are empty - ossification: osteoblasts establsim in vacant lacuna