anatomy questions

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pbkal

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hai
can anyone please answer these questions-
1)infection from saggital sinus drains into??
2)spread of infection from facial vein to cavernous sinus is through??
 
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uabsfm said:
zona pellucida ia a feature of-
a)spermatid
b)mature spermatozoan
c)primary oocyte
d)mature ovum
e)corpus luteum

which ligament counterbalances the medial movement of tmj??
a)sphenomandibular ligament
b)stylomandibular ligament
c)temporomandibular ligament

an inpression in the right lung is caused by the presence of
a)superior vena cava
b)azygos vein
c)arch of aorta
d)two of the above
e)all of abovec
Click to expand...
.
 
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make you smile said:
Can you confirm the answer(-90).Isn't zona pellucida a feature of a mature follicle?
Click to expand...
Resting membrane potential for cardiac muscle is -90mV and most normal heart activities occur between +10 and -90mV.
don't confuse this with the normal heart axis which is between 0 and +90.

zona pellucida is a feature of primary oocytes.
 
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firasoblast said:
Resting membrane potential for cardiac muscle is -90mV and most normal heart activities occur between +10 and -90mV.
don't confuse this with the normal heart axis which is between 0 and +90.

zona pellucida is a feature of primary oocytes.
Click to expand...


I read that mean electrical exis of heart is in between -30 and +110. isnt it like this?
correct me if wrong
 
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pbkal said:
pbkal said:
most hyperosmotic part of kidney??
a)ascending loop of henle
b)inner medulla
c)distal tubule
d)collecting duct

ans for this is (b).
if 'descending loop of henle'was also one of the options,then what will be the ans?since descending loop of henle is permeable to water,will it be the ans??pls clear this doubt.
Click to expand...

collecting duct can be the answer in the situation of maximum adh effect.
Click to expand...
 
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The doctor will prescribes antibiotics for bacterial sinusitis, you may need to take them for as long as 3 weeks. If you really want to feel better, get plenty of rest and fluids so that your body's immune system can work along with the antibiotics to fight the infection.
 
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hello pbkal,

Do you know the answers of these questions or somebody else,? thanks

1- In a histologic section through the spiphyseal plate of the femur of an 18 years old male, which of the following is the zone in which cartilage lacunae appear swollen and the condrocytes are large?
1- proliferation
2. bone deposition
3. reserve cartilage
4. cartilage calcification
5 hypertrophy and maduration
2- WHICH OF THE FOLLOWING IS A SENSORY NERVE?
A) TORACODORSAL
B) LONG THORACIC
C) MEDIAL PECTORAL
D) LOWER SUBSCAPULAR
E) MEDIAL ANTEBRACHIAL CUTANEOUS- ANSWER

3-.EACH OF THE FOLLOWING STRUCTURES IS WRAPPED IN THE INVESTING LAYER OF THE DEEP CERVICAL FASCIA EXCEPT ONE. WHICH ONE IS THE EXCEPTION?
A)TRAPEZIUS
B)STERNOTHYROID
C) ANTERIOR SCALENE- ANSWER
D)STERNOCLEIDOMASTOID
E)INFERIOR BELLY OF OMOHYOID
 
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dentimax said:
hello pbkal,

Do you know the answers of these questions or somebody else,? thanks

1- In a histologic section through the spiphyseal plate of the femur of an 18 years old male, which of the following is the zone in which cartilage lacunae appear swollen and the condrocytes are large?
1- proliferation -answer(not sure)
2. bone deposition
3. reserve cartilage
4. cartilage calcification
5 hypertrophy and maduration
2- WHICH OF THE FOLLOWING IS A SENSORY NERVE?
A) TORACODORSAL
B) LONG THORACIC
C) MEDIAL PECTORAL
D) LOWER SUBSCAPULAR
E) MEDIAL ANTEBRACHIAL CUTANEOUS- ANSWER

3-.EACH OF THE FOLLOWING STRUCTURES IS WRAPPED IN THE INVESTING LAYER OF THE DEEP CERVICAL FASCIA EXCEPT ONE. WHICH ONE IS THE EXCEPTION?
A)TRAPEZIUS
B)STERNOTHYROID
C) ANTERIOR SCALENE- answer
D)STERNOCLEIDOMASTOID
E)INFERIOR BELLY OF OMOHYOID
Click to expand...

pls correct if im wrong.
 
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firasoblast said:
Resting membrane potential for cardiac muscle is -90mV and most normal heart activities occur between +10 and -90mV.
don't confuse this with the normal heart axis which is between 0 and +90.

what is ment by normal activity,is it contraction relaxation ,if it is then it should be between -90 and +10.correct if i am missing something.
Click to expand...
 
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The electrical axis of the heart is the mean direction of the action potentials traveling through the ventricles during ventricular activation (depolarization). The QRS complex, which represents ventricular depolarization, is used for the determination of the electrical heart axis.
The normal electrical axis of the heart is situated between -30 degrees and +90 degrees (positive 90 degrees) and because of the choices in this case should be +90.
 
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dentimax said:
hello pbkal,

Do you know the answers of these questions or somebody else,? thanks

1- In a histologic section through the spiphyseal plate of the femur of an 18 years old male, which of the following is the zone in which cartilage lacunae appear swollen and the condrocytes are large?
1- proliferation
2. bone deposition
3. reserve cartilage
4. cartilage calcification
5 hypertrophy and maduration-ans
2- WHICH OF THE FOLLOWING IS A SENSORY NERVE?
A) TORACODORSAL
B) LONG THORACIC
C) MEDIAL PECTORAL
D) LOWER SUBSCAPULAR
E) MEDIAL ANTEBRACHIAL CUTANEOUS-ans

3-.EACH OF THE FOLLOWING STRUCTURES IS WRAPPED IN THE INVESTING LAYER OF THE DEEP CERVICAL FASCIA EXCEPT ONE. WHICH ONE IS THE EXCEPTION?
A)TRAPEZIUS
B)STERNOTHYROID- ans
C) ANTERIOR SCALENE-D)STERNOCLEIDOMASTOID
E)INFERIOR BELLY OF OMOHYOID
Click to expand...


all other mentioned structures lies in the investing layer of deep fascia
 
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urine sample with a ph of 5.7 has a hydrogen ions concentration of approx
a. 2 x 10-3 M
b. 2 x 10-6M
c. 2 x 10 -8 M
d. 2 x 10 -5 M

plez explain the answer

which of the following describes the GTP binding protein

a. catalyze reaction that produces DAG
b. they are tightly bound to adenyl cyclase
c. they usually inactivate protein kinase C
d. self inactivating
 
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when a brief period of hysterical hyperventilation causes respiratory alklosis, tetany might be caused by a sudden decrease in which of the following?

a. total serum
b. ionized serum
c. citrate bound
d. serum protein bound

reflex exhibited by masseter muscle when dentist taps on the side of the face is
a. stretch
b.withdrawal
c.mass muscle
d.golgi tendon
e.cross extensor

pt having long history of taking anabolic steroids but recently stopped is likely to exhibit each of the following except
a. sterility
b.low FSH levels
c low testosteron levels
d.decrease no of spermatids

which is nucleotide?

a. urate
b.uracil
c.ribose
d.adenosine
e.thymidylate

slight detachment of retina results in a decrease in lenght from the optic center and the subject exhibits
a. near sightedness
b.far sightedness
c.strabismus
d.nystagmus
 
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uabsfm said:
urine sample with a ph of 5.7 has a hydrogen ions concentration of approx
a. 2 x 10-3 M
b. 2 x 10-6M
c. 2 x 10 -8 M
d. 2 x 10 -5 M

plez explain the answer

which of the following describes the GTP binding protein

a. catalyze reaction that produces DAG
b. they are tightly bound to adenyl cyclase
c. they usually inactivate protein kinase C
d. self inactivating
Click to expand...

pH is the negative log of hydrogen concentration. So you have, -log x = 5.7; therefore, x = 10^(-5.7) which is a bit bigger than 10^(-6), like 2 x 10^(-6).

phosphatidylinositol is broken down in the cell membrane by the alpha subunit of a an activated G protein (bound to GTP) into IP3 (inositol triphosphate) and DAG (diacylglycerate).
 
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robhmnt said:
pH is the negative log of hydrogen concentration. So you have, -log x = 5.7; therefore, x = 10^(-5.7) which is a bit bigger than 10^(-6), like 2 x 10^(-6).

phosphatidylinositol is broken down in the cell membrane by the alpha subunit of a an activated G protein (bound to GTP) into IP3 (inositol triphosphate) and DAG (diacylglycerate).
Click to expand...


thanx for the explanation
 
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what is the good source for the information regarding the contact areas of maxollary and mandibular teeth? if anybody has information about the contact areas plz mention
 
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what are the largest cusps of the maxillary and mandibular primary 1st molar,?

in decks answer is mesiobuccal for both the teeth while in wheelers answers for both the teeth are mesiolingual cusps, so which one is the right answer?
 
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uabsfm said:
what is the net charge of glutamic acid at pH of 1?
a.+2
b. +1
c. 0
d.-1
e. -2.
Click to expand...

All three groups (one COOH and one NH3+ on the alpha carbon, and one COOH on the side chain] will be protonated at this pH; therefore you get only the + charge of NH3+, leaving the molecule with a total charge of +1.
PKa of COOH on alpha carbon = 2
pKa of COOH on the side chain = 4
pKa of NH3+ on the alpha carbon = 9
Since all three pKa's are greater than 1 (the pH of the environment), the groups will tend to keep their protons.
 
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adipose lipase hydrolyse triglyceride in response to to activation of
a. phosphodiesterase by glucagon
b.phosphodiesterase by insulin
c. protein phosphatase by glucagon
d.protein kinase by insulin
e. adenyl cyclase by glucagon

in glycoproteins carbohyydrate groups are attached to each of the following amino acids except
a. serine
b. proline
c. asparagine
d.hydroxylysine
 
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uabsfm said:
adipose lipase hydrolyse triglyceride in response to to activation of
a. phosphodiesterase by glucagon
b.phosphodiesterase by insulin
c. protein phosphatase by glucagon
d.protein kinase by insulin
e. adenyl cyclase by glucagon

Glucagon activates adenylate cyclase, which catalyzes the breakdown of ATP to AMP. AMP activates protein kinase A, which will activate ATGL (adipose triglyceride lipase) by phosphorylation.

in glycoproteins carbohyydrate groups are attached to each of the following amino acids except
a. serine
b. proline
c. asparagine
d.hydroxylysine
Click to expand...
Hydroxyproline could be an answer, but proline does not have any hydroxyl or amide group for glycosylation (it should be either O-linked or N-linked).
Good night all.
 
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Hb is a globular molecule consisting of a molecular structure with moeity of

a. 1 heme group and 1 polypeptide chain
b. 1 heme grp and 4 polypeptide chain
c. 4 heme and 4 polypeptide chain
d. 4 heme and 1 polypeptide chain

formation of hydroxy apetite is associated with each of the following except
a. ion product grater than solubility product constant
b. loss of H2O from hydrated ion
c. pre existing hydroxy apetite
d. supersaturation
e. low pH
 
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uabsfm said:
Hb is a globular molecule consisting of a molecular structure with moeity of

a. 1 heme group and 1 polypeptide chain
b. 1 heme grp and 4 polypeptide chain
c. 4 heme and 4 polypeptide chain
d. 4 heme and 1 polypeptide chain

formation of hydroxy apetite is associated with each of the following except
a. ion product grater than solubility product constant
b. loss of H2O from hydrated ion
c. pre existing hydroxy apetite
d. supersaturation
e. low pH
Click to expand...

Low pH will decrease OH- and PO3- concentrations, causing the quilibrium to shift to the right [losing hydroxyapatite]
 
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on the crowns of which maxillary molars the contact area is smallest?
molar surface
a. first mesial
b. first distal
c. second mesial
d. second distal
e. third mesial

which of the following maxillary teeth most likely exhibit anomalous two rooted specimen?
a. central incisior
b. lateral incisior
c. canine
d. first premolar
e. second premolar


which of the following best describes non working inclines?

a.inner inclines of guiding cusps and inner inclines of centric cusps
b. inner inclines of opposing centric cusps
c. outer inclines of centric cusps and inner inclines of guiding cusps
d. outer inclines of guiding cusps and outer inclines of centric cusps

which relation ship results in one maxillary teeth contacting two mandibular teeth in the intercuspal position?

a. balanced occlusion
b.cusp fossae -cusp fossae
c.cusp fossae -cusp marginal ridge
d.canine protected occlusion
e. anterior protected occlusion

when in its proper position , the crown of a mandibular molar inclines

a. distally and facially
b. distally and lingually
c. mesially and lingually
d. mesially and facially

the earliest indication of mixed dentition consists of the primary dentition and eruption of which of the following?

a. maxillary central incisior
b.mandibular central incisior
c. maxillary and mandibular first molar
d.maxillary first molar
e mandibular first molar

which of the following muscles most responsible for elevating the mandible during normal closure?
a. masseter and temporalis
b. masseter and diagastric
c. medial and lateral pteygoid
d. temporalis and medial pterygiod

in which tooth proximal height of contour is in the incisal third except?

a. mandibular central incisior, distal
b.maxillary lateral incisior, mesial
c.mandibular lateral incisior, distal
d.maxillary canine, mesial
e. mandibular camine. distal

after attrition incisal outline of mandibular canine normally exhibits
a. longer mesiolingual slope than distoincisal slope
b.longer distoincisal slope
c.mesio and distoincisal slopes of same lenght
d. straight line with no slopes
e. cusp tip offset to distal

oral micro organisms usually reside in areas of the oral cavity where O2 is limited , they metabolise primarily by
a. fermention
b.aerobic respiration
c.anaerobic respiration
d.nitrogen fixation

sonication is recommended for cleaning instruments before sterilization for
a. to reduce exposure to sharp injuries
b. another way to kill bacterial endospores
c. get instruments cleaner thean hand cleaning
 
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in which primary molar mesial portion most distinctly separated fromm reminder of occlusal surface by transverse ridge
a. maxillary first
b.mandibular second'
c.maxillary second
d. mandibular second
 
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Adipose tissue is found in the submucosa of the palate in

a rugae
b incisive papillae
c midline at the level of molars
d lateral level at the level of premolars
e lateral area at the level of molars
 
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which of the following describes the axial inclination of the palatal root of maxillary second molar?
vertical
mesial and lingual
mesial and facial
distal and facial
distal and lingual

which of the following affect restrict the amount of lateral shift that can occur on a working condyle

a) mesial wall of the articular fossa on the working side
b) superior wall of the articular fossa on the non working side
c)capsular ligament
d) styloohyoid ligament
e) stylomandibular ligament

on the crown of an incisior which feature separates th labial lobes?
a) mammelons
b)lingual groove
c)facial developmental depression

which of the following groove that originates in mesial pit and extends toward MB line angle on maxillary premolars?
central
MB secondary
MB triangular
mesial marginal
ML tiangular
 
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uabsfm said:
when a brief period of hysterical hyperventilation causes respiratory alklosis, tetany might be caused by a sudden decrease in which of the following?

a. total serum(ans)
b. ionized serum
c. citrate bound
d. serum protein bound

reflex exhibited by masseter muscle when dentist taps on the side of the face is
a. stretch(ans)
b.withdrawal
c.mass muscle
d.golgi tendon
e.cross extensor

pt having long history of taking anabolic steroids but recently stopped is likely to exhibit each of the following except
a. sterility
b.low FSH levels
c low testosteron levels(ans)
d.decrease no of spermatids

which is nucleotide?

a. urate
b.uracil
c.ribose
d.adenosine(ans) not sure
e.thymidylate

slight detachment of retina results in a decrease in lenght from the optic center and the subject exhibits
a. near sightedness(ans)
b.far sightedness
c.strabismus
d.nystagmus
Click to expand...


hope this helps
 
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uabsfm said:
on the crowns of which maxillary molars the contact area is smallest?
molar surface
a. first mesial
b. first distal
c. second mesial
d. second distal(ans)
e. third mesial

which of the following maxillary teeth most likely exhibit anomalous two rooted specimen?
a. central incisior
b. lateral incisior
c. canine
d. first premolar(ans)
e. second premolar


which of the following best describes non working inclines?

a.inner inclines of guiding cusps and inner inclines of centric cusps
b. inner inclines of opposing centric cusps(ans)
c. outer inclines of centric cusps and inner inclines of guiding cusps
d. outer inclines of guiding cusps and outer inclines of centric cusps

which relation ship results in one maxillary teeth contacting two mandibular teeth in the intercuspal position?

a. balanced occlusion(ans) not sure
b.cusp fossae -cusp fossae
c.cusp fossae -cusp marginal ridge(ans) not sure
d.canine protected occlusion
e. anterior protected occlusion

when in its proper position , the crown of a mandibular molar inclines

a. distally and facially
b. distally and lingually
c. mesially and lingually(ans)
d. mesially and facially

the earliest indication of mixed dentition consists of the primary dentition and eruption of which of the following?

a. maxillary central incisior
b.mandibular central incisior
c. maxillary and mandibular first molar
d.maxillary first molar
e mandibular first molar(ans)
which of the following muscles most responsible for elevating the mandible during normal closure?
a. masseter and temporalis(ans) massetor being the strongest muscle i guess
b. masseter and diagastric
c. medial and lateral pteygoid
d. temporalis and medial pterygiod

in which tooth proximal height of contour is in the incisal third except?

a. mandibular central incisior, distal
b.maxillary lateral incisior, mesial(ans)
c.mandibular lateral incisior, distal
d.maxillary canine, mesial(ans)
e. mandibular camine. distal(ans)

all three of them dont have their proximal contact in the incisal third

after attrition incisal outline of mandibular canine normally exhibits
a. longer mesiolingual slope than distoincisal slope
b.longer distoincisal slope
c.mesio and distoincisal slopes of same lenght
d. straight line with no slopes
e. cusp tip offset to distal

dont know the answer plz help

oral micro organisms usually reside in areas of the oral cavity where O2 is limited , they metabolise primarily by
a. fermention
b.aerobic respiration
c.anaerobic respiration(ans)
d.nitrogen fixation

sonication is recommended for cleaning instruments before sterilization for
a. to reduce exposure to sharp injuries
b. another way to kill bacterial endospores
c. get instruments cleaner thean hand cleaning(ans)
Click to expand...
 
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uabsfm said:
how come the answer is near sightedness will you explain it plz?

and if you can explain other answers too
Click to expand...

question says detachment from retina ...so image cant be formed behind or on it it has to form in front of it....since it forms in front of it it has to be myopia(near sightedness)
 
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krishna99 said:
which of the following describes the axial inclination of the palatal root of maxillary second molar?
vertical
mesial and lingual
mesial and facial
distal and facial
distal and lingual(ans)

which of the following affect restrict the amount of lateral shift that can occur on a working condyle

a) mesial wall of the articular fossa on the working side
b) superior wall of the articular fossa on the non working side
c)capsular ligament(ans)
d) styloohyoid ligament
e) stylomandibular ligament

on the crown of an incisior which feature separates th labial lobes?
a) mammelons(ans)
b)lingual groove
c)facial developmental depression

which of the following groove that originates in mesial pit and extends toward MB line angle on maxillary premolars?
central
MB secondary
MB triangular
mesial marginal
ML tiangular
Click to expand...
not sure about this one
 
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krishna99 said:
Adipose tissue is found in the submucosa of the palate in

a rugae
b incisive papillae
c midline at the level of molars
d lateral level at the level of premolars(answer)
e lateral area at the level of molars
Click to expand...


anterolateral zone of palate -adipose tissue so this seems 2 b the best option
 
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uabsfm said:
on the crowns of which maxillary molars the contact area is smallest?
molar surface
a. first mesial
b. first distal-answer
c. second mesial
d. second distal
e. third mesial

which of the following maxillary teeth most likely exhibit anomalous two rooted specimen?
a. central incisior
b. lateral incisior
c. canine
d. first premolar-answer
e. second premolar


which of the following best describes non working inclines?

a.inner inclines of guiding cusps and inner inclines of centric cusps
b. inner inclines of opposing centric cusps
c. outer inclines of centric cusps and inner inclines of guiding cusps
d. outer inclines of guiding cusps and outer inclines of centric cusps-answer(not sure)

which relation ship results in one maxillary teeth contacting two mandibular teeth in the intercuspal position?

a. balanced occlusion
b.cusp fossae -cusp fossae
c.cusp fossae -cusp marginal ridge-answer
d.canine protected occlusion
e. anterior protected occlusion

when in its proper position , the crown of a mandibular molar inclines

a. distally and facially
b. distally and lingually
c. mesially and lingually-answer
d. mesially and facially

the earliest indication of mixed dentition consists of the primary dentition and eruption of which of the following?

a. maxillary central incisior
b.mandibular central incisior
c. maxillary and mandibular first molar
d.maxillary first molar
e mandibular first molar-answer

which of the following muscles most responsible for elevating the mandible during normal closure?
a. masseter and temporalis-answer
b. masseter and diagastric
c. medial and lateral pteygoid
d. temporalis and medial pterygiod

in which tooth proximal height of contour is in the incisal third except?

a. mandibular central incisior, distal-in incisal 3rd
b.maxillary lateral incisior, mesial
c.mandibular lateral incisior, distal-in incisal 3rd
d.maxillary canine, mesial
e. mandibular camine. distal

after attrition incisal outline of mandibular canine normally exhibits
a. longer mesiolingual slope than distoincisal slope-answer
b.longer distoincisal slope
c.mesio and distoincisal slopes of same lenght
d. straight line with no slopes
e. cusp tip offset to distal

oral micro organisms usually reside in areas of the oral cavity where O2 is limited , they metabolise primarily by
a. fermention
b.aerobic respiration
c.anaerobic respiration-answer
d.nitrogen fixation

sonication is recommended for cleaning instruments before sterilization for
a. to reduce exposure to sharp injuries
b. another way to kill bacterial endospores
c. get instruments cleaner thean hand cleaning
Click to expand...
-answer
 
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gudluk said:
uabsfm said:
on the crowns of which maxillary molars the contact area is smallest?
molar surface
a. first mesial
b. first distal
c. second mesial
d. second distal(ans)
e. third mesial

have you read it anywhere for this answer? in any book?

which of the following maxillary teeth most likely exhibit anomalous two rooted specimen?
a. central incisior
b. lateral incisior
c. canine
d. first premolar(ans)
e. second premolar

this is right answer, I think
which of the following best describes non working inclines?

a.inner inclines of guiding cusps and inner inclines of centric cusps
b. inner inclines of opposing centric cusps(ans)
c. outer inclines of centric cusps and inner inclines of guiding cusps
d. outer inclines of guiding cusps and outer inclines of centric cusps
this one also

which relation ship results in one maxillary teeth contacting two mandibular teeth in the intercuspal position?

a. balanced occlusion
b.cusp fossae -cusp fossae
c.cusp fossae -cusp marginal ridge
d.canine protected occlusion
e. anterior protected occlusion

when in its proper position , the crown of a mandibular molar inclines

a. distally and facially
b. distally and lingually
c. mesially and lingually(ans)
d. mesially and facially

the earliest indication of mixed dentition consists of the primary dentition and eruption of which of the following?

a. maxillary central incisior
b.mandibular central incisior
c. maxillary and mandibular first molar
d.maxillary first molar
e mandibular first molar(ans)

in this they have given the maxillary and mandibular first molars as an answer, I am also having doubt

which of the following muscles most responsible for elevating the mandible during normal closure?
a. masseter and temporalis(ans) massetor being the strongest muscle i guess
b. masseter and diagastric
c. medial and lateral pteygoid
d. temporalis and medial pterygiod

I think that may be the answer
in which tooth proximal height of contour is in the incisal third except?

a. mandibular central incisior, distal
b.maxillary lateral incisior, mesial(ans)
c.mandibular lateral incisior, distal
d.maxillary canine, mesial(ans)
e. mandibular camine. distal(ans)
I know that none of these teeth surfaces having contact in middle third but thisa was the q given in one paper
all three of them dont have their proximal contact in the incisal third

after attrition incisal outline of mandibular canine normally exhibits
a. longer mesiolingual slope than distoincisal slope
b.longer distoincisal slope
c.mesio and distoincisal slopes of same lenght
d. straight line with no slopes- I think this may be the answer
e. cusp tip offset to distal

dont know the answer plz help

oral micro organisms usually reside in areas of the oral cavity where O2 is limited , they metabolise primarily by
a. fermention
b.aerobic respiration
c.anaerobic respiration(ans)
d.nitrogen fixation
this is right
sonication is recommended for cleaning instruments before sterilization for
a. to reduce exposure to sharp injuries
b. another way to kill bacterial endospores
c. get instruments cleaner thean hand cleaning(ans)
Click to expand...
this one also
Click to expand...
 
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