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  • Question 1 - All of the following features are associated with congenital uterine malformations except: ...

    Correct

    • All of the following features are associated with congenital uterine malformations except:

      Your Answer: Pregnancy induced hypertension

      Explanation:

      Congenital uterine abnormalities are associated with an increased risk of spontaneous abortions, preterm delivery of the foetus, fetal growth retardation and malpresentation.

    • This question is part of the following fields:

      • Embryology
      18.2
      Seconds

  • Question 2 - Which one of the following statements best suits Androgen insensitivity syndrome? ...

    Correct

    • Which one of the following statements best suits Androgen insensitivity syndrome?

      Your Answer: Gonadectomy must be performed after puberty because of the increased risk of malignancy

      Explanation:

      Androgen insensitivity syndrome patients have 46XY chromosomes. They are males by genotype but appear as female because of insensitivity to male hormones. It is advisable to perform gonadectomy in these patients after puberty because these patients are at increased risk of developing malignancy.

    • This question is part of the following fields:

      • Embryology
      37.9
      Seconds

  • Question 3 - The external carotid artery develops from which pharyngeal arch? ...

    Incorrect

    • The external carotid artery develops from which pharyngeal arch?

      Your Answer: 2nd

      Correct Answer: 1st

      Explanation:

      The external carotid develops from the 1st arch. The common and internal carotid develop from the 3rd arch.

    • This question is part of the following fields:

      • Embryology
      6.8
      Seconds

  • Question 4 - Regarding the closure of the ductus arteriosus (DA) after birth which of the...

    Incorrect

    • Regarding the closure of the ductus arteriosus (DA) after birth which of the following most accurately describes the mechanisms leading to closure of the DA?

      Your Answer: Increased arterial pO2, increased bradykinin & increased Prostaglandin E2

      Correct Answer: Increased arterial pO2, increased bradykinin & decreased Prostaglandin E2

      Explanation:

      Normal closure of the ductus arteriosus (DA) is brought about by a number of mechanisms. Upon delivery the new born babies first breath inflates the lungs and this causes a rise in pO2. Oxygen is known to cause constriction of the DA in vivo and in vitro. In addition the decreased vascular resistance means the pressure within the lumen of the DA drops aiding closure. In addition on inflation of the lungs, the lungs produce bradykinin which stimulates smooth muscle constriction of the ductus. The most important factor is thought to be the drop in Prostaglandin E2. Prostaglandin E2 maintains patency of the Ductus in the unborn child but after birth is metabolised in the lungs and its levels fall rapidly within 3 hours of birth.

    • This question is part of the following fields:

      • Embryology
      27.5
      Seconds

  • Question 5 - Ootidogenesis refers to which process during Oogenesis? ...

    Correct

    • Ootidogenesis refers to which process during Oogenesis?

      Your Answer: 1st and 2nd Meiotic Divisions

      Explanation:

      Oogonium become Primary Oocyte via Growth/Maturation. This process is called oocytogenesis Primary Oocyte undergoes 2 meiotic divisions to become Ootids. This process is called Ootidogenesis Ootids differentiate into Ovum

    • This question is part of the following fields:

      • Embryology
      174
      Seconds

  • Question 6 - How many days after fertilisation does the blastocyst form? ...

    Incorrect

    • How many days after fertilisation does the blastocyst form?

      Your Answer: 2 days

      Correct Answer: 5 days

      Explanation:

      Shortly after the Morula enters into the uterus, approximately on the 4th day after fertilization a fluid filled cystic cavity appears in the morula and transforms the morula into a blastocyst.

    • This question is part of the following fields:

      • Embryology
      14.2
      Seconds

  • Question 7 - At what age does meconium first appear in the fetal terminal ilium? ...

    Incorrect

    • At what age does meconium first appear in the fetal terminal ilium?

      Your Answer: 34-38 weeks gestation

      Correct Answer: 10-16 weeks gestation

      Explanation:

      Meconium first appears in the fetal ilium at 10-16 weeks.

    • This question is part of the following fields:

      • Embryology
      8.1
      Seconds

  • Question 8 - What is the life span of the corpus luteum in days? ...

    Incorrect

    • What is the life span of the corpus luteum in days?

      Your Answer: 20-22

      Correct Answer: 14-16

      Explanation:

      After the release of the oocyte, the theca and the granulosa cells form the corpus luteum which undergoes extensive vascularization for continued steroidogenesis. Progesterone is secreted by the luteal cells and is synthesized from cholesterol. The luteal phase lasts for 14 days and if implantation does not occurs the corpus luteum starts to degenerate. As B-HCG produced by the implanted embryo maintains it and without it luteolysis occurs.

    • This question is part of the following fields:

      • Embryology
      20.3
      Seconds

  • Question 9 - Which pharyngeal arch is closest to the head of the embryo? ...

    Incorrect

    • Which pharyngeal arch is closest to the head of the embryo?

      Your Answer: 4th

      Correct Answer: 1st

      Explanation:

      The arches are numbered according to their proximity to the head i.e. the 1st is the closest to the head end of the embryo and the 6th closest to the tail end as shown by the diagram below the table

    • This question is part of the following fields:

      • Embryology
      4.6
      Seconds

  • Question 10 - From which germ cell layer does the GI tract initially develop? ...

    Incorrect

    • From which germ cell layer does the GI tract initially develop?

      Your Answer: Ectoderm

      Correct Answer: Endoderm

      Explanation:

      GI Tract initially forms via gastrulation from the endoderm of the trilaminar embryo around week 3. It extends from the buccopharyngeal membrane to the cloacal membrane. Later in development there are contributions from all three germ cell layers.

    • This question is part of the following fields:

      • Embryology
      18.2
      Seconds

SESSION STATS - PERFORMANCE PER SPECIALTY

Embryology (3/10) 30%
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