Template:BGDA Practical 3 - Implantation Interactive: Difference between revisions

Revision as of 14:33, 6 May 2019

Interactive Component

Attempt the Quiz - Implantation

Here are a few simple Quiz questions that relate to Implantation from the lecture and practical.

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 <quiz display=shuffle>
-{At fertilisation:
+{Which of the following is essential for successful implanatation?
 |type="()"}
-- male and female pronuclei complete their meiotic division
+- a decidual reaction
-+ male and female pronuclei enter interphase
+- transport of the blastocyst to the uterine cavity at the right time
-- cyclic AMP (cAMP) is secreted by the zygote to block polyspermy
+- removal of the zona pellucida just before attachment of the blastocyst
-- the zona pellucida is discarded
+- release of Prostaglandin E2 by the endometrial stroma
-- All of the above.
++ all of the above are needed
-|| The male and female pronuclei enter interphase before commencing the first mitosis.
+|| All of the above are needed! Prostaglandin E2 is an important regulator of human trophoblast invasion, from the underlying stroma that activates other signaling proteins. [https://www.ncbi.nlm.nih.gov/pubmed/29359200 PMID 29359200]
-{All of the following are essential for successful fertilization except:
+{Diagnostic tests for pregnancy are based mainly on:
 |type="()"}
-- capacitation of the sperm
+- levels of oestrogens
-- transport of the sperm through the female genital tract
+- levels of progesterone
-- transport of the zygote to the uterine cavity
+- levels of thyroxin
-+ separation of the sperm from semen
++ secretion of human chorionic gonadotrophin (hCG)
-- bidirectional movements of gametes in the uterine tube
+- secretion of human chorionic somatomammotropin (hCS)
-|| Separation of the sperm from semen is not essential for successful fertilization to occur. All the other listed options are essential for successful fertilization.
+|| Secretion of human chorionic gonadotrophin (hCG)
-{Fertilization commences when a spermatozoon makes contact with an oocyte and ends:
-|type="()"}
-+ with the intermingling of maternal and paternal chromosomes at metaphase of the first cleavage division
-- when the spermatozoon is completely taken into the ootid
-- when the spermatozoa penetrates the zona pellucida
-- with the formation of the second polar body
-- all of the above
-|| Fertilization commences when a spermatozoon makes contact with an oocyte and ends with the intermingling of maternal and paternal chromosomes at metaphase of the first cleavage division.
 {Transport of sperm through the cervix is assisted by all of the following except: