CLEARING

Question 1

removing dehydrant forn the tissue and replacing it with a fluid miscible to both dehydrant and embedding agent. makes tissues transluscent. most flammable fluids have low boiling points and excessive clearing may cause brittleness

Answer 1

clearing

Question 2

main purpose of clearing

Answer 2

create a bridge between the process of dehydration and infiltration

Question 3

characteristics of good clearing agent

Answer 3

miscible with alcohol and paraffin wax
not produce tissue shrinkage
make tissue transparent
does not dissolve in aniline dyes
not evaporate quickly in water bath

Question 4

time for xylene

Answer 4

30 mins to 1 hr

Question 5

time for toluene

Answer 5

1hr to 2 hrs

Question 6

time for benzene

Answer 6

15 mins to 1 hr

Question 7

it is an advantage of an agent where it is rapid, makes tissues transparent, miscible in alcohol and paraffin and cheap

Answer 7

xylene

Question 8

it is a disadvantage of an agent where it is slower than xylene and more expensive

Answer 8

toluene

Question 9

a disadvantage of an agent where it is carcinogenic and may lead to aplastic anemia

Answer 9

benzene

Question 10

what is carcinogenic

Answer 10

potential to cause a cancer

Question 11

an advantage to an agent where it is not carcinogenic, miscible in both alcohol and paraffin and does not make the tissues hard

Answer 11

toluene

Question 12

a disadvantage of an agent thatis highly flammable, makes tissues hard after for more than 3 hours and not suitable for nervous tissues and lymph nodes

Answer 12

xylene

Question 13

an advantage of an agent where it is used for urgent biospsies and the fastest clearing agent

Answer 13

benzene

Question 14

a clearing agent that is used for tough tissues and large specimens and is toxic to liver

Answer 14

chloroform

Question 16

a clearing agent that is used for smooth muscle tissue and cns

Answer 16

cedarwood oil

Question 17

a clearing agent that is used for insects, embryos, and delicate tissues

Answer 17

aniline oil

Question 18

a clearing agent that is causes minimum shrinkage of tissues and usually slow, expensive, and difficult to use

Answer 18

clove oil

Question 19

a clearing agent that is used for tough tissues and large specimens, cheap, and dangerous to inhale on prolonged exposure

Answer 19

carbon tetrachloride

Question 20

a clearing agent that is nontoxic but with offensive odor and considered superior among other agents since it can process dehydration and clearing and it can save time

Answer 20

tetrahydrfuran

Question 21

a clearing agent that causes greater shrinkage than xylene and toxic to liver

Answer 21

dioxane

Question 22

a clearing agent that is used when clearing directly from water

Answer 22

gum syrup and glycerin

Question 23

a clearing agent that is used for skin and smooth muscle

Answer 23

oil of bergamot

Question 24

a clearing agent that is used for skin

Answer 24

oil of origanum

Question 25

a clearing agent that is used for delicate tissues

Answer 25

oil of wintergreen

Question 26

a clearing agent that is used for smooth muscle and has foul odor

Answer 26

carbon disulfide

Question 27

a clearing agent that is used for friable tissues

Answer 27

carbol xylene

Question 28

a clearing agent that is used for delicate tissues like eyes

Answer 28

terpineol

Question 29

a clearing agent that is used for smooth muscles

Answer 29

phenol

Question 30

a clearing agent that is used excellent as an clearing agent

Answer 30

high test aviation lead-free gasoline