Derivatives of germ layers: MCQ 13+

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• 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