8. (B) Inner surface:
Lined by Thick,
transparent and wet
mucous membrane
formed of :
Epithelium: non
kretanized stratified
squamous
C.T. Corium
contains mucous
glands called labial
gland (accessory
gland ).
9. (D) Red margin:
Covered by modified skin
which has no hair follicles,
no sweat glands & no
sebaceous glands.
The CT. dermis forms deep
papillae that contain
numerous blood capillaries &
receptors. The skin is thin ,
transparent & highly
sensitive.
14. Macroscopic appearance:
formed of dorsal surface &
ventral surface
•The dorsal surface is rough &
adherent mucous membrane
divided by V- shaped line called
sulcus terminalis into:
1.Posterior1/3:
Where lingual tonsil are
present.
1.Anterior 2/3:
The ventral surface: non
adherent & non adherent
mucous membrane
15.
16. A bag of mucous membrane full of
sckletal muscle.
17. (A) Skeletal muscle
bundles:
• run in vertical, horizontal and
longitudinal directions.
• Covered by stratified
squamous epithelium & a CT
corium.
• The ventral surface covered
by non keratinized. The CT
corium has lingual
glands( mucous )
• The dorsal surface is
covered by partially
keratinized & rough due to
lingual papillae
18. Lingual papillae:
Numerous projections of the
mucous membrane on the
dorsal surface of the tongue .
Each papilla is formed of:
Central core of C.T covered
with stratified squamous
epithelium.
19. Filiform papillae (conical papillae):
Site: anterior 2/3 of the
dorsum of the tongue
Shape: conical
Number: most numerous.
Taste buds: not present
20. Fungiform papillae:
Site: anterior2/3
particularly on the tip
and lateral sides
scattered between
conical papillae.
Shape: basal narrow neck
and rounded top.
Number : less numerous
than conical papillae.
Taste buds: few.
22. Circumvallate papillae
Shape: rounded
with constricted
base which is
surrounded by a
groove .
Von- Ebner’s glands
(serous) underneath
this papillae
Taste buds:
numerous
23. Foliate papillae
Site:
lateral margin of the dorsal
surface the tongue of rabbit.
Shape:
parallel broad projections of
CT covered by epithelium.
Number:
rabbit tongue but not in
human
Taste buds: numerous
24. Filiform Fungiforn Circumvillate Foliata
Site: Ant 2/3 of dorsal
surface
At tip & lateral sides On V shaped line Lateral margin of
post. 1/3 of tongue
of rabbit
Shape: Conical & long .
(broad base &
pointed tip)
Fungus shape
narrow base &
rounded top
Constricted base &
broad top
Parallel ridges
No: Numerous Less in No 8-12 in number
Taste buds: Abscent + ve few (at top) numerous at sides numerous at sides
26. Structure:
flask shaped bodies
scattered among the
stratified squamous
epithelium covering
some lingual papillae
It is formed of an upper
opening called
gustatory pore &
contain 3 types of cells:
1 2
3
27. 1- Gustatory cells
(haircells)
• Central in position.
• Shape: modified
columnar.
• Their free ends show
short microvilli
• Their basal ends
surrounded by free
nerve endings which
carry the taste
sensation.
33. The free red margin of the lip contains :
a. Hair follicles.
b. Sweat glands.
c. Sebaceous glands.
d. Numerous receptors.
34. The mucous membrane covering the
inner surface of the lip :
a. Is formed of stratified squamous
keratinized epithelium.
b. Contains sebaceous glands.
c. Contains sweat glands.
d. Is thicker than the skin of the
outer surface of the lip.
e. Has no glands.
35. The lip:
a.Its inner surface is covered by mucous
membrane.
b.Its outer surface is covered by thick
skin.
c.Smooth muscles run in different
directions.
d.Labial glands are mainly serous.
36. Taste buds are :
a.Neuroepithelial structures.
b.Formed of 3 types of cells.
c.Situated between the cells of
stratified squamous epithelium.
d.In contact with fine nerve fibres that
carry taste sensations.
e.All of the above.
•
37. Gustatory cells of taste buds:
a.Are modified pyramidal cells.
b.Have dark cytoplasm.
c.Act as stem cells for regeneration of
other cells.
d.Their basal parts are surrounded by
nerve fibres.
38. The skin covering the outer surface of the lip
a.Contains no hair follicles or sebaceous
glands.
b.Contains no sweat glands.
c.Is thicker than the inner surface of the
lip.
d.All of the above.
e.None of the above.
39. Mitotic figures are common in the cells of :
a. Basal cell layer.
b. Spinous layer.
c. Horny layer.
d. Clear layer.
e. None of the above.
40. The cells of granular layer contain :
a. Melanin pigments.
b. Carotene pigments.
c. Eleidin granules.
d. Basophilic keratohyaline granules.
e. Acidophilic keratohyaline granules.
41. Berbick granules are present in :
a. Melanophores.
b. Merkel's cells.
c. Langerhans cells.
d. Stratum lucidum.
e. Meissner's corpuscles
