Misc 4

Question 1

Gingiva has …… rete pegs than the alveolar mucosa

Answer 1

higher (more interdigitation)

• Note: Gingiva contains collagen fibers, while alveolar mucosa has collagen, elastin & blood vessels
• Attached gingiva has no rete pegs

Question 2

Metopic suture refers to ……

Answer 2

frontal suture (between the two frontals)

Question 3

The free gingival groove is …..

Answer 3

the groove separating the free from the attached gingiva

Question 4

The blood vessel with greatest smooth muscle thickness relative to its size is …….

Answer 4

arterioles

* Even more than Large arteries

Question 5

In the developing embryo, two laminae arises which separate the lip from the palate, which are ………

Answer 5

vestibular lamina & dental lamina

Question 6

Palatine tonsils & pharyngeal tonsils have afferent lymph vessels. T/F?

Answer 6

False

Question 7

Lateral cleft of the upper lip is due to …..

Answer 7

failure in fusion of maxillary and medial nasal processes.

Question 8

Most of the efferent & afferent fibers from the cerebral cortex traverse …….

Answer 8

the internal capsule

* Note that: The cerebral peduncles (Rt. & Lt.) make up the midbrain

Question 9

Atlanto-occipital joint allows …….

Answer 9

flexion & extension (nodding)

* It is a synovial joint

Question 10

The matrix secreted by the odontoblasts is …….

Answer 10

aminoacid with collagen fibers

* Not sure of this though

Question 11

The superior alveolar nerves supply …….

Answer 11

the maxillary sinus, the max. gingiva & teeth

Question 12

The reason elastin is more elastic than collagen is …….

Answer 12

it lack hydroxylysin

Question 13

Shivering is ……

Answer 13

mechanism for heat production. Mediated by the hypothalamus

Question 14

Salivary glands of the hard palate is located in …..

Answer 14

posterolateral zone

Question 15

Myopia means the eyeball is ……, while hyperopia means ………

Answer 15

long (tx is concave lens)

short (tx is convex lens)

Question 16

Skin water resistance is due to the presence of …….

Answer 16

keratin

Question 17

Facial cleft occurs if ………. don’t fuse

Answer 17

maxillary prominence & lateral nasal process don’t fuse

* They form the nasolacrimal duct

Question 18

The vertical part of the palatine bone forms ……..

Answer 18

part of the lateral nasal cavity wall

Question 19

The laryngeal cartilage that extends between the arytenoid cartilage & the epiglottis is ……..

Answer 19

the cuneiform cartilage

• All three paired cartilage are hyaline
• Corniculate cartilage articulate with the arytenoid

Question 20

In the bone, calcified ground substance add ……., while tensile strength depends primarily on ……

Answer 20

compressive strength

collagenous fibrils of matrix

Question 21

The hepatic veins drain the liver to the ……..

Answer 21

IVC

Question 22

Lamina papyracea is a part of ………. of the orbit

Answer 22

medial wall (thin part of ethmoid bone)

• Roof: frontal, lesser wing
• Lateral: zygoma, frontal, greater wing
• Medial: maxilla, frontal, lacrimal, ethmoid
• floor: maxilla, zygoma, palatine bone

Question 23

The lateral ventricles are surrounded laterally & inferiorly by ……..

Answer 23

caudate nucleus

* It is

Question 24

The retropharyngeal space is bounded laterally by ……..

Answer 24

the carotid sheath

Question 25

An area of loose CT beneath GIT epithelium is ......

Answer 25

lamina propria | * Note: submucosa is dense CT

Question 26

The left recurrent laryngeal N is closely related at its beginning to .......

Answer 26

ligamentum arteriosum and the arch of the aorta

Question 27

Axillary lymph nodes drain ......

Answer 27

upper limb, upper lateral part of the breast, and superficial abdominal lymph vessels above the umbilicus * There is: Anterior (pectoral), posterior, lateral (for upper limb), and central (receives from all 3)

Question 28

Both dental arches drain into ...... lymph node

Answer 28

submandibular (except lower incisors into sublingual) | * All ultimately drain into the deep cervical node

Question 29

The origin of the middle pharyngeal constrictor is ......, and the inferior is ........

Answer 29

hyoid bone thyroid cartilage * Both insert into the median raphe

Question 30

The muscle responsible for elevating the upper lip is .......

Answer 30

levator labii | * origin is maxilla

Question 31

Muscles of the tongue which are connected to the hyoid bone are .........

Answer 31

hyoglossus & genioglossus

Question 32

The three branches of the trigeminal N pass through foramen in ........

Answer 32

sphenoid bone | * Note that: ovale & rotundum are in the greater wing

Question 33

Tropocollagen is found in .........

Answer 33

collagen & reticular fibers only | * Elastic fibers are not included. They contain elastin, desmosin & isodesmosin

Question 34

The cricoid cartilage is attached to the trachea by ......

Answer 34

external ligaments * Thyroid cartilage to hyoid bone by external ligament also * All nine cartilages of larynx together by intrinsic ligaments * The annular ligaments attach each tracheal cartilage to neighboring cartilages

Question 35

Blood from branches of the portal vein and hepatic artery enters ......

Answer 35

the liver sinusoids at the periphery of the liver lobule, and passes centripetally to reach the central vein

Question 36

The ECA extends from .........

Answer 36

the upper border of the thyroid cartilage to the back of the neck of the mandible where it ends by dividing into the superficial temporal and maxillary artery * The superior thyroid A originates just below the level of greater cornu

Question 37

Barr body is used to ........

Answer 37

determine the sex. Found in female cells only | * During interphase, one X chromosome remains condensed as a dark staining body

Question 38

Osteoid differs from bone in .......

Answer 38

bone is calcified | * Note: the number of lacunae is the same in both

Question 39

The muscle that retracts the tongue is ........

Answer 39

hyoglossus

Question 40

The principal extensor of the forearm is .......

Answer 40

the triceps brachii

Question 41

The nerve most likely to become injured in fractures of the mid-humeral shaft is .......

Answer 41

radial nerve | * travels in the radial (spiral) groove on the posterior aspect of the midhumeral shaft

Question 42

General sensation of Cn IX have their cell bodies in .......

Answer 42

superior & inferior nuclei of Cn IX | * Not in spinal nucleus

Question 43

During inspiration phase the following events occur

Answer 43

The diaphragm moves downwards, the ribs are raised superiorly, the suprapleural membrane remains fixed, and the tone of the muscles of the anterior abdominal wall is decreased. * The sternum moves anteriorly

Question 44

The isthmus of the thyroid gland contacts ......... posteriorly

Answer 44

trachea

Question 45

The deep cervical fascia surrounding the thyroid gland. It becomes two layers posteriorly and contains branches of .......

Answer 45

inf. thyroid A & recurrent laryngeal N (They contact the gland directly)

Question 46

The middle mediastinum contains .....

Answer 46

the heart, recurrent laryngeal N, arch of aorta & phreic N

Question 47

The epithelium well adapted for secretory or absorptive functions is .....

Answer 47

simple columnar

Question 48

Peyer's patches and pharyngeal tonsils are .......

Answer 48

subepithelial & non encapsulated | * Peyer's is in the lamina propria, especially ilium