1staidanasci3 Flashcards
1
Q
- The supraoptic nucleus is intricately involved
in which of the following bodily functions?
A. Aggression
B. Satiety
C. Hunger
D. Water balance
E. Circadian rhythm
A
D. Water balance
2
Q
- Sensory innervation to the hypothenar region
of the hand travels via the
A. radial nerve.
B. ulnar nerve.
C. musculocutaneous nerve.
D. median nerve.
E. axillary nerve
A
B. ulnar nerve.
3
Q
- Which of the following muscles divides the
maxillary artery into three distinct anatomical
segments?
A. Lateral pterygoid
B. Masseter
C. Posterior belly of digastric
D. Stylohyoid
E. Anterior belly of digastric
A
A. Lateral pterygoid
4
Q
- Each of the following structures receives
blood from the external carotid EXCEPT
A. thyroid.
B. brain.
C. salivary glands.
D. teeth.
E. jaw bones.
A
B. brain.
5
Q
- The vertebral artery enters the spine at which
level?
A. C6
B. T2
C. T1
D. C5
E. C7
A
A. C6
6
Q
- The function of the salpingopharyngeus
muscle is to
A. open the auditory tube.
B. raise the mandible.
C. propel food down pharynx.
D. retract the tongue.
E. protrude the mandible.
A
A. open the auditory tube.
7
Q
- Within which bone is the vestibulocochlear
nerve most contained?
A. Parietal
B. Occipital
C. Temporal
D. Frontal
E. Maxilla
A
C. Temporal
8
Q
- Which of the following regarding the pectoralis
major muscle is TRUE?
A. It acts to protract and depress the glenoid
of the scapula.
B. It is an accessory muscle of respiration.
C. It is innervated by the lateral and medial
pectoral nerves.
D. It inserts at the coracoid process.
E. It is located superiorly to the pectoralis
minor.
A
C. It is innervated by the lateral and medial
pectoral nerves.
9
Q
- Which of the following arteries supplies the
maxillary canines and incisors?
A. Pterygoid
B. Sphenopalatine
C. Descending palatine
D. Infraorbital
E. Pharyngeal
A
D. Infraorbital
10
Q
- The cisterna chyli drains lymph from each of
the following EXCEPT
A. thoracic duct.
B. abdomen.
C. pelvis.
D. inguinal region.
E. lower extremities.
A
A. thoracic duct.
11
Q
- As the dentin ages, which of the following is
typically seen?
A. Increased dentinal tubule diameter
B. Decreased reparative dentin
C. Decreased dead tracts
D. Decreased sclerotic dentin
E. Increased deposition of peritubular
dentin
A
E. Increased deposition of peritubular
dentin
12
Q
- A 17-year-old patient presents at your office
asking why there is a brownish-gray band
across each of her teeth. You suspect that she
was previously prescribed a regimen of tetracycline
most likely at which of the following
ages?
A. 10
B. 11
C. 5
D. 14
E. 17
A
C. 5
13
Q
- Which of the following vitamin deficiencies
is LEAST likely to directly affect enamel
structure?
A. A
B. B
C. C
D. K
E. Calcium
A
D. K
14
Q
- Which type of epithelium is most commonly
found lining closed body cavities?
A. Simple columnar
B. Simple squamous
C. Transitional
D. Stratified squamous
E. Pseudostratified columnar
A
B. Simple squamous
15
Q
- Which of the following is TRUE of the basement
membrane?
A. Lamina lucida is electron dense.
B. Lamina densa is a product of the connective
tissue.
C. Type IV collagen is typically found in the
basal lamina.
D. Reticular lamina contains anchoring
fibrils.
E. It does not have a filtering function
A
C. Type IV collagen is typically found in the
basal lamina.
16
Q
- Which of the following oral epithelial types is
keratinized?
A. Sulcular epithelium
B. Alveolar mucosa
C. Junctional epithelium
D. Attached gingiva
E. Gingival col
A
D. Attached gingiva
17
Q
- Which of the following has the LOWEST
organic composition?
A. Cementum
B. Dentin
C. Pulp
D. Enamel
E. Alveolar bone
A
D. Enamel
18
Q
- With increased age of the pulp, each of the
following occurs EXCEPT
A. decreased collagen content.
B. decreased size of apical foramen.
C. decreased sensitivity.
D. decreased cellularity.
E. increased calcification
A
A. decreased collagen content.
19
Q
- Which of the following portions of the tooth
or its associated structures allows for orthodontic
movement?
A. Enamel
B. Cementum
C. Dentin
D. Epithelial attachment
E. Alveolar bone
A
B. Cementum
20
Q
- What type of nerve ending is most common
in the periodontal ligament?
A. Coiled
B. Spindle
C. Free
D. Meissner
E. Ruffini
A
C. Free
21
Q
- Which of the following is the depression of
the interdental gingiva that connects the lingual
and facial papillae?
A. Gingival col.
B. Alveolar mucosa.
C. Attached gingiva.
D. Mucogingival junction.
E. Interdental papilla
A
A. Gingival col.
22
Q
- Which of the following is FALSE regarding
the primary palate?
A. It can be involved in facial clefting.
B. It contains the incisive foramen.
C. It usually contains no teeth.
D. It is mesenchymal in origin.
E. It is formed by fusion of two median nasal
processes
A
C. It usually contains no teeth.
23
Q
- Which of the following best describes circumpulpal
dentin?
A. Most is produced in the form of intertubular
dentin.
B. It is the initial 150 μm of dentin laid
down.
C. It lacks hydroxyapatite.
D. It forms before mantle dentin.
E. It lacks dead tracts.
A
A. Most is produced in the form of intertubular
dentin.
24
Q
- During amelogenesis, enamel is laid down
each day at a rate of
A. 0.04 μm.
B. 1 mm.
C. 0.1 mm.
D. 4 μm.
E. 4 mm.
A
D. 4 μm.
25
Q
- Formation of which of the following brain
structures normally occurs LAST in the
fetus?
A. Cerebellum
B. Ventricles
C. Neural tube
D. Hemispheres
E. Temporal lobe
A
E. Temporal lobe
26
Q
- During odontogenesis, which of the following
cells determine the type of tooth to be
formed?
A. Mesoderm
B. Mesenchyme
C. Ectomesenchyme
D. Endoderm
E. Ectoderm
A
C. Ectomesenchyme
27
Q
- The area of skin covering the parotid gland
receives sensory innervation from which
nerve?
A. Transverse cervical
B. Superficial temporal
C. Long buccal
D. Lesser occipital
E. Great auricular
A
E. Great auricular
28
Q
- Each of the following is TRUE regarding the
sacral plexus EXCEPT
A. one of its main branches is the obturator
nerve.
B. it is located in the posterior pelvic wall.
C. it provides motor innervation to parts of
the leg.
D. it supplies sensory innervation to the
lower back.
E. it is comprised of L4-L5 and S1-S4.
A
A. one of its main branches is the obturator
nerve.
29
Q
- Which of the following cranial nerves does
NOT have an efferent involuntary parasympathetic
function?
A. VII
B. V
C. X
D. III
E. IX
A
B. V
30
Q
- Which is TRUE regarding general visceral
afferent function of the vagus nerve?
A. It is involved with chemo- and baroreception
from the carotid body and sinus.
B. It travels through the jugular foramen.
C. Its origin of cell bodies is the nucleus
ambiguus.
D. It transmits sensation from the posterior
meninges.
E. It is involved with taste sensation
A
B. It travels through the jugular foramen.
31
Q
- Which of the following is FALSE regarding
the adrenal gland?
A. Zona fasciculata secretes glucocorticoids.
B. Outer cortex contains chromaffin cells.
C. Aldosterone is a mineralocorticoid produced
here.
D. Sex steroids are secreted from the innermost
layer of the outer cortex.
E. Inner medulla secretes catecholamines
A
B. Outer cortex contains chromaffin cells.
32
Q
- If a patient is suffering from lack of peristalsis
in the large intestine, which of the following
may be affected?
A. Microvilli
B. Myenteric plexus
C. Plicae circulares
D. Teniae coli
E. Crypts of Lieberkühn
A
D. Teniae coli
33
Q
- Bile contains each of the following EXCEPT
A. lipoproteins.
B. plasmin.
C. albumin.
D. prothrombin.
E. alpha and beta globulins
A
B. plasmin.
34
Q
- The temporal bone articulates with each of
the following bones EXCEPT
A. parietal.
B. occipital
C. zygoma.
D. ethmoid.
E. sphenoid.
A
D. ethmoid.
35
Q
- Terminal differentiation occurs during which
stage of the cell cycle?
A. G1
B. S
C. G0
D. G2
E. Mitosis
A
C. G0
36
Q
- Which of the following glands has paracrine
function?
A. Gastroenteropancreatic glands.
B. Adrenal glands.
C. Gonads.
D. Salivary glands.
E. Pituitary glands.
A
A. Gastroenteropancreatic glands.
37
Q
- The embryological stomodeum is lined by
A. endoderm.
B. mesoderm.
C. neural crest.
D. ectoderm.
E. ectomesenchyme
A
D. ectoderm.
38
Q
- Which of the following structures has its
embryological origin located further cranial
in a 4- to 5-week-old fetus?
A. Stapes
B. Internal carotid artery
C. Vagus nerve
D. Glossopharyngeal nerve
E. Stylopharyngeus muscle
A
A. Stapes
39
Q
- Which of the following best describes the
decidual reaction of embryogenesis?
A. Breakdown of the zona pellucida
B. The first zygotic cleavage
C. Invasion of the syncytiotrophoblast into
the uterine endometrium
D. Release of an ovum from the ovary
E. Enlargement of the endometrium with
lipid and glycogen accumulation
A
E. Enlargement of the endometrium with
lipid and glycogen accumulation
40
Q
- Which of the following is the number of chromosomes
present after fusion of sperm and egg?
A. 1/2N
B. N
C. 2N
D. 3N
E. 4N
A
C. 2N
41
Q
- Each of the following contains sinusoids
EXCEPT
A. epidermis.
B. liver.
C. lymphatic tissue.
D. endocrine glands.
E. spleen.
A
A. epidermis.
42
Q
- Peroxisomes contain which of the following
enzymes?
A. Elastase
B. Collagenase
C. Trypsin
D. Chymotrypsin
E. Catalase
A
E. Catalase
43
Q
- Production of vitamin D occurs at which of
the following sites?
A. Large intestine
B. Kidney
C. Spleen
D. Liver
E. Epidermis
A
E. Epidermis
44
Q
- Which of the following directly controls lens
accommodation in the eye?
A. Ciliary body
B. Neural retina
C. Choroids body
D. Pupil
E. Iris
A
A. Ciliary body
45
Q
- Serum includes each of the following
EXCEPT
A. electrolytes.
B. fibrinogen.
C. immunoglobulins.
D. water.
E. albumin
A
B. fibrinogen.
46
Q
- Which of the following is TRUE of the heart?
A. The pericardium contains cardiac
muscle.
B. The endocardium has a layer of simple
squamous endothelium.
C. The innermost layer of the heart is
pericardium.
D. Normally the thickest portion of the heart
is the endocardium.
E. A layer of columnar epithelium surrounds
the pericardium.
A
B. The endocardium has a layer of simple
squamous endothelium.
47
Q
- Which of the following is FALSE regarding
heart conduction?
A. The bundle of His conducts electric current
to the Purkinje fibers.
B. The SA node regulates the rate of electrical
conductance.
C. The autonomic nervous system regulates
the rhythm of cardiac contraction.
D. Cardiac muscle maintains an intrinsic
rhythmicity.
E. The pacemaker of the heart is the SA node
A
C. The autonomic nervous system regulates
the rhythm of cardiac contraction.
48
Q
- Which of the following is TRUE of platelets?
A. They range 200,000-400,000 per mm3
blood.
B. They are involved in immunoregulation.
C. The average lifespan is upward of
120 days.
D. They are nucleated.
E. They function in blood gas transport.
A
A. They range 200,000-400,000 per mm3
blood.
49
Q
- Which of the following is the site of B-cell
maturation?
A. Lymph nodes
B. Blood
C. Thymus
D. Bone marrow
E. Target tissue
A
D. Bone marrow
50
Q
- Thyroxine is secreted from
A. follicular cells.
B. outer cortex of adrenals.
C. pars distalis.
D. pars intermedia.
E. parafollicular cells
A
A. follicular cells.
