Embryology MCQ 50+

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• Vernix caseosa
  ক

  Is a product of exfoliated peridermal cell

  খ

  Contain sebum

  গ

  Protect the skin

  ঘ

  Is secreted in the embryonic period

  ঙ

  Hinder the growth of the fetus
• Anterior 2/3rd of tongue arises from
  ক

  Two lingual swelling

  খ

  Tuberculum impar

  গ

  Hypobranchial eminence

  ঘ

  Developed from 4th arch

  ঙ

  Submandibular duct
• The cloaca is divided into the rectum and urogenital complex by the
  ক

  Urorectal septum

  খ

  Cloacal membrane

  গ

  Urogenital ridge

  ঘ

  Sinus bulbs

  ঙ

  Genital ridge
• Derivatives of the ureteric bud in male include the
  ক

  Collecting tubule

  খ

  Ureter

  গ

  Distal convoluted tubule

  ঘ

  Prostatic part of the urethra

  ঙ

  Urinary bladder except trigone
• The paramesonephric ducts
  ক

  Fuse to form the uterus

  খ

  Are suppressed by developing testis

  গ

  Open into the urogeuital sinuses directly

  ঘ

  Develop appendix of testes in male

  ঙ

  Form the ductus deference
• Derivatives of Wolffian duct are
  ক

  Epididymis

  খ

  Ducts deferens

  গ

  Seminal vesicle

  ঘ

  Appendix testes

  ঙ

  Lower part of the uterus
• Persistent truncus arteriosus occurs due to
  ক

  Failure of conotruncal ridge to fuse

  খ

  Failure of descend of conotruncal ridge towards the ventricle

  গ

  Migration of neural crest cells towards truncal and bulbar ridges

  ঘ

  Aorticopulmonary septum following an oblique course

  ঙ

  Anterior displacement of aorticopulmonary septum
• A new born baby is noted to have a left unilateral cleft. Behaving no abnormalities-at the palate. The developmental defects accountable are
  ক

  Failure of the left maxillary prominence to unite with left medial nasal prominance

  খ

  Failure of the left lateral palatine process to fuse with the median palatine process

  গ

  Failure of the right and left medial nasal prominence to merge

  ঘ

  Failure of the left maxillary process to fuse with the medial nasal process

  ঙ

  Lip muscles to divide completely
• Derivatives of frontonasal prominence include
  ক

  Bridge of the nose

  খ

  Forehead

  গ

  Cheek

  ঘ

  Lateral part of upper lip

  ঙ

  Lower lip
• Regarding the development of eyeball
  ক

  Macular development begins in the fifth month of gestation

  খ

  Macular development is not complete until after birth

  গ

  Closure of the optic cup begins posteriorly

  ঘ

  The choroid is the first in the body to produce Melanin

  ঙ

  The primary vitreous forms the bulk of the vitreous in developed eye
• During the development of the pancreas
  ক

  It originates at 4th week of gestation as paired evaginations of the foregut

  খ

  The islets of langerhans make up 10% of pancreas in fetal life

  গ

  The ventral bud gives rise to body and tail

  ঘ

  In 50% of cases the duct system fails to fuse

  ঙ

  The pancreatic buds fuse to form one pancreas at approximately 12th week to gestation
• Development of the interatrial septum receives contribution from the
  ক

  Septum primum

  খ

  Septum secundum

  গ

  Right venous valve

  ঘ

  Spiral septum

  ঙ

  Septum spurium
• Non-closure of neuropore leads to
  ক

  Anencephaly

  খ

  Rachischisis

  গ

  Spina bifida

  ঘ

  Omphalocele

  ঙ

  Gastoschisis
• Factors responsible for neural tube defect are
  ক

  Infant of diabetic mother

  খ

  Folate deficiency

  গ

  Failure of migration of neural crest cell

  ঘ

  Zinc deficiency

  ঙ

  Magnesium deficiency
• Neural tube defect
  ক

  May occur due to environmental causes

  খ

  Can be prevented by using folic acid

  গ

  Usually involves the parts of the peripheral nervous system

  ঘ

  Starts during the third month of pregnancy

  ঙ

  Is diagnosed by invasive prenatal testing
• Myelomeningocele is associated with
  ক

  Folate deficiency

  খ

  Involvement of lumbosacral region

  গ

  A high risk of hydrocephalus

  ঘ

  Spastic paralysis of lower limbs in lumbosacral involvement

  ঙ

  Minimal neurologic deficit in involvement of upper thoracic and cervical region
• Derivatives of fourth aortic arch are:
  ক

  Arch of the aorta

  খ

  Proximal part of right subclavian artery

  গ

  Arch of the aorta

  ঘ

  Proximal part of right subclavian artery

  ঙ

  Internal carotid artery

  চ

  Common carotid artery

  ছ

  Right pulmonary artery

  জ

  Internal carotid artery

  ঝ

  Common carotid artery
• The structures derived from the first branchial arch are
  ক

  Muscles of mastication

  খ

  Muscles of mastication

  গ

  Muscles of facial expression

  ঘ

  Malleus

  ঙ

  incus and stapes

  চ

  The facial nerve

  ছ

  The levatorpalati muscles

  জ

  Muscles of facial expression

  ঝ

  Malleus
• Muscles developed from the second pharyngeal arch are
  ক

  Buccinator

  খ

  Stylohyoid

  গ

  Anterior belly of digastric

  ঘ

  Mylohyoid

  ঙ

  Tensor tympani
• Ectodermal germ layer gives rise to following organs
  ক

  Pituitary gland

  খ

  Skin

  গ

  Thyroid gland

  ঘ

  Liver

  ঙ

  Spleen
• Ectodermal derivatives include the
  ক

  Parotid glands

  খ

  Anterior lobe of the hypophysis cerebri (pituitary glan

  গ

  Lining epithelium of the pharynx

  ঘ

  Lining epithelium of the whole of the urethra

  ঙ

  Lining epithelium of the blood vessels
• Derivatives of neural crest are:
  ক

  Facial skeleton

  খ

  Melanocytes

  গ

  Adrenal medulla

  ঘ

  Hepatocytes

  ঙ

  Spinal cord
• Neural crest derivates are
  ক

  Melanocyte

  খ

  Odontoblast

  গ

  Posterior root ganglia

  ঘ

  Infundibulum

  ঙ

  Oligodentrocyte
• The derivatives of neural crest cells are
  ক

  Cranio-facial skeleton

  খ

  Autonomic ganglia

  গ

  Melanocyte

  ঘ

  Duramater

  ঙ

  Cortex of adrenal gland
• The endocardial cushions of the atrioventricular canal participate in
  ক

  Closure of the ostium primum between the left and right atria

  খ

  Closure of the foramen ovale

  গ

  Formation of the membranous interventricular septum

  ঘ

  Division of the atrium into right and left chambers

  ঙ

  Formation of the semilunar valve
• The neural crest cells:
  ক

  Is derived from the junctional zone between neural plate ectoderm and embryonic ectoderm

  খ

  Gives rise to autonomic ganglia

  গ

  Gives rise to adrenal medulla

  ঘ

  Contributes to developing alar lamina

  ঙ

  Gives rise to marginal layer of the neural tube
• Structures derived embryologically from the foregut include
  ক

  Stomach

  খ

  Lining of the bronchial tree

  গ

  Sigmoid colon

  ঘ

  Third part of the duodenum

  ঙ

  Meckel’s diverticulum
• Bone/s derived from neural crest cells is/are
  ক

  Frontal

  খ

  Ethmoid

  গ

  Maxilla

  ঘ

  Occipital bone

  ঙ

  Parietal
• Glands derived from the ectoderm are
  ক

  Breast

  খ

  Thyroid

  গ

  Parathyroid

  ঘ

  Parotid
• The following statements are correct regarding the development of the testis
  ক

  It originates from the celomic epithelium

  খ

  It gains contributions from the developing mesonephros

  গ

  It completes its descent into the scrotum at birth

  ঘ

  The inguinal hernias are more common at birth

  ঙ

  Its descent is aided by the processusvaginalis