Nbde I q's

[mg777]

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Which nerve is directly lateral to the surface of the medial pterygoid?

Facial
Lingual
Masseteric
Long bucal
Auricotemporal

Which of the following histolog. descrbes oral mucosa on floor of mouth?

Nonkeratinized w/ lamina propria & submucosa
Nonkeratinized w/ lamina propria & no submucosa

I think the answers is masseteric for the first. The second, I cant rmember if it has submucosa or not. Anyone remember where and where not to find a submucosa in the mouth?

 

[bobino]

pretty sure the answer to #1 is lingual, masseteric stays superior in the pterygomandibular triangle and passes through the mandibular notch to get the the masseter.

#2, I am pretty sure it has a submucosa, although it is thin. The only reason I think it has a submucosa is that is were the sublingual gland would be located. Also i found some old class histo notes that say the places in the oral cavity with no submucosa are:
median raphe of hard palate
gingiva
both dorsal and ventral surfaces of tongue
alveolar mucosa

 

[mg777]

thx for the reply & detailed explanation bobino👍

 

[saburi]

1 Infection with Histoplasma capsulatum in normal, healthy individuals is usually a👎
a. dermatomycosis
b. opportunistic infection
c. rapidly spreading disease
d. self-limiting, benign disease
e. disease localized in the blood
is it B or D

2.Each of the following statements about lymphocyte activation is correct EXCEPT one. Which one is the EXCEPTION ?
a. Interleukin 5 is a B cell growth and differentiation factor
b. Interleukin 2 stimulates proliferation of T and B lymphocytes
c. B lymphocytes recognize antigen on the surface of antigen-presenting cells in the context of HLA-D molecules
d. T lymphocytes recognize antigen on the surface of antigen-presenting cells in the context of HLA-B molecules
i think the ans is A

 

[mg777]

1 Infection with Histoplasma capsulatum in normal, healthy individuals is usually a👎
a. dermatomycosis
b. opportunistic infection
c. rapidly spreading disease
d. self-limiting, benign disease
e. disease localized in the blood
is it B or D

2.Each of the following statements about lymphocyte activation is correct EXCEPT one. Which one is the EXCEPTION ?
a. Interleukin 5 is a B cell growth and differentiation factor
b. Interleukin 2 stimulates proliferation of T and B lymphocytes
c. B lymphocytes recognize antigen on the surface of antigen-presenting cells in the context of HLA-D molecules
d. T lymphocytes recognize antigen on the surface of antigen-presenting cells in the context of HLA-B molecules
i think the ans is A

o

Pretty sure the first one is D, it's a repeat from a released exam. Second one I m not sure on right now, dont want to tell you the wrong answer.

 

[onetoothleft]

1 Infection with Histoplasma capsulatum in normal, healthy individuals is usually a👎
a. dermatomycosis
b. opportunistic infection
c. rapidly spreading disease
d. self-limiting, benign disease
e. disease localized in the blood
is it B or D

2.Each of the following statements about lymphocyte activation is correct EXCEPT one. Which one is the EXCEPTION ?
a. Interleukin 5 is a B cell growth and differentiation factor
b. Interleukin 2 stimulates proliferation of T and B lymphocytes
c. B lymphocytes recognize antigen on the surface of antigen-presenting cells in the context of HLA-D molecules
d. T lymphocytes recognize antigen on the surface of antigen-presenting cells in the context of HLA-B molecules
i think the ans is A

I think the answer to 2 is "B."

IL-5 stimulates B cells so that is correct.
IL-2 stimulates T cells (not B cells that i can see, although it could help out with B cell antibody production but i dont think that counts since by then it is already activated)
HLA-D molecules make up MHC II on APC's so could bind a CD4 cell (Th). It could also bind a BCR if the epitope is correct and stimulate clonal expansion, i think.
HLA-B molecules are MHC class I, and are present on all cells and CD8 (Tc) cells would indeed recognize them.

 

[dentheartthrob]

1 Infection with Histoplasma capsulatum in normal, healthy individuals is usually a👎
a. dermatomycosis
b. opportunistic infection
c. rapidly spreading disease
d. self-limiting, benign disease
e. disease localized in the blood
is it B or D

2.Each of the following statements about lymphocyte activation is correct EXCEPT one. Which one is the EXCEPTION ?
a. Interleukin 5 is a B cell growth and differentiation factor
b. Interleukin 2 stimulates proliferation of T and B lymphocytes
c. B lymphocytes recognize antigen on the surface of antigen-presenting cells in the context of HLA-D molecules
d. T lymphocytes recognize antigen on the surface of antigen-presenting cells in the context of HLA-B molecules
i think the ans is A

1. i think its d.
2. is also d, coz i think T lymphocytes are cell mediated immunity and has
nothing to do with antibody-antigen complexes

 

[dentheartthrob]

an autosomal dominat trait showing 50 perent penetrance will be pheotypically expressedin what percent of the offspring?
a. 0
b. 25
c. 33
d. 50
e. 75

I think the answer is b but dont know quite how to explain it, can anyone be kind enough to give me a good explaination for it? thanks

 

[oralpath]

What is the best answer for this question? Does anyone know? I have some old exams which show a different answer from Decks.

In relashionship to the occlusal plane of the mandibular molars, the mandibular formane is located:
a. at or slightly below the occlusal plane and posterior to the molars
b. at or slightly above the occlusal plane and posterior to the molars

Thanks for the help.

 

[dentheartthrob]

What is the best answer for this question? Does anyone know? I have some old exams which show a different answer from Decks.

In relashionship to the occlusal plane of the mandibular molars, the mandibular formane is located:
a. at or slightly below the occlusal plane and posterior to the molars
b. at or slightly above the occlusal plane and posterior to the molars

Thanks for the help.

I thikn it would be b, since i know that on pedo patients it is slightly below.

 

[saburi]

i think its below the occlusal plane and post. to mandibular molars

 

[oralpath]

Thanks guys.

My old exams says b.
but, Decks says a.

I am very confused, but I think that is above the occlusal plane.

 

[dentheartthrob]

Thanks guys.

My old exams says b.
but, Decks says a.

I am very confused, but I think that is above the occlusal plane.

yup, just think of it when you're doing a mandi block

 

[pol37]

Which one differentiate cementum from enamel?

1. the presents of collagen fibers
2. the absence of incremental lines
3. the cellular component in the mature tissue
4. derivation from the epithelial root sheet (Hertwig)

is it ?
1&2
1&3 (ans in old exam)
1&4
2&3
2&4
3&4
1,2,3,4 (my ans)

that looks wrong to me can some1 explain? What has the enamel with root sheet in common? and incremental lines I only can think of incremental lines of retzius and ebner which are in the enamel and dentin but not cementum

 

[PrePerio]

1. presence of collagen fibers --> this is correct
2. cementum DOES have incremental lines; as far as I know they don't have a fancy name like those in enamel and dentin
3. the cellular component is the mature tissue --> correct because of cellular cementum in the apical 1/3 that contains cementoblasts, inactive cementoblasts, fibroblasts from the PDL, and cementoclasts
4. derivation from the epithelial root sheath - the root sheath guides formation of root dentin...when the sheath degenerates, the surrounding bone is induced to form cementum --> cementum is a dental sac derivative

Which one differentiate cementum from enamel?

1. the presents of collagen fibers
2. the absence of incremental lines
3. the cellular component in the mature tissue
4. derivation from the epithelial root sheet (Hertwig)

is it ?
1&2
1&3 (ans in old exam)
1&4
2&3
2&4
3&4
1,2,3,4 (my ans)

that looks wrong to me can some1 explain? What has the enamel with root sheet in common? and incremental lines I only can think of incremental lines of retzius and ebner which are in the enamel and dentin but not cementum