Digestive tract

Question 1

what type of epithelium do lips have?

Answer 1

keratinized stratified squamous

Question 2

which tongue papillae can be partially keratinized?

Answer 2

filiform

Question 3

basic tastes are detected by receptor proteins encoded by what two genes?

Answer 3

taste receptor genes 1 and 2

TRG1 and TRG2

Question 4

what taste receptor detects sweetness?

Answer 4

T1R- subunits (T1R2 and T1R3)

Question 5

what taste receptor detects umami?

Answer 5

T1R- subunits (T1R1 and T1R3)

Question 6

what channel do H+ flow through for sour taste?

Answer 6

amiloride-sensitive Na+ channels, PKD1L3, and PKD2L1

Question 7

what channel do Na+ flow through for salty taste?

Answer 7

amiloride-sensitive Na+ channels

Question 8

what are the growth lines called in dentin?

Answer 8

growth lines of Owen

Question 9

what are the growth lines called in enamel?

Answer 9

growth lines of Retzius

Question 10

enamel is synthesized by what types of cells?

Answer 10

ameloblasts

Question 11

dentin is synthesized by what types of cells?

Answer 11

odontoblasts

Question 12

what is the hardest bone in the body?

Answer 12

enamel

Question 13

what attaches gingival epithelium to enamel

Answer 13

epithelial attachment of Gottlieb