HD: Embryology at a glance MCQs
Test Questions and Answers.
When does the embryonic period end?
(a) end of week 7
(b) beginning of week 8
(c) end of week 8
(d) end of week 9
(e) beginning of week 10 - Answer (a) end of week 7
Which event in the female cycle is used to clinically date gestation?
(a) fertilization
(b) first day of last menstruation
(c) last day of last menstruation
(d) length of menstruation
(e) ovulation - Answer b: 1st day of last menstrual period (LMP)
Which hormone, secreted by the trophoblast, is important in maintaining the endometrium
after implantation of the blastocyst?
(a) follicle stimulating hormone (FSH)
(b) human chorionic gonadotrophin
(c) luteinising hormone (LH)
(d) oestrogen
(e) testosterone - Answer b: the syncytiotrophoblast secretes hCG which maintains the
corpus luteum, which maintains the decidua
What is the final maturation process of spermatozoa that occurs in the female genital system?
(a) acrosome reaction
(b) capacitation
(c) cortical reaction
(d) spermatocytogenesis
(e) spermiogenesis - Answer b. Capacitation: When mature sperm enter the female system
they become hyperactive (from removal of cholesterole and increase in calcium uptake)
The acrosome and cortical reactions help prevent fertilisation of an ovum by more than one
sperm. Which structure also helps prevent this?
, (a) cortical granules
(b) cumulus cells
(c) fimbrae
(d) plasma membrane
(e) zona pellucida - Answer a: cortical granules are released by the ovum to prevent further
entry from other sperm
Which structure is not formed from mesoderm?
(a) bone
(b) bone marrow
(c) dermis
(d) epidermis
(e) ureter - Answer d: epidermis
Which structure is not formed from endoderm?
(a) kidneys
(b) liver
(c) pancreas
(d) parathyroid glands
(e) tonsils - Answer a: Kidneys
Which structure is not formed from ectoderm?
(a) epidermis
(b) central nervous system
(c) peripheral nervous system
(d) retina
(e) thymus gland - Answer a: thymus gland
How many days after fertilisation does the blastocyst begin to implant into the uterine
endometrium?
(a) 3 days
(b) 6 days
(c) 10 days
(d) 14 days
(e) 21 days - Answer b. 6 days
Test Questions and Answers.
When does the embryonic period end?
(a) end of week 7
(b) beginning of week 8
(c) end of week 8
(d) end of week 9
(e) beginning of week 10 - Answer (a) end of week 7
Which event in the female cycle is used to clinically date gestation?
(a) fertilization
(b) first day of last menstruation
(c) last day of last menstruation
(d) length of menstruation
(e) ovulation - Answer b: 1st day of last menstrual period (LMP)
Which hormone, secreted by the trophoblast, is important in maintaining the endometrium
after implantation of the blastocyst?
(a) follicle stimulating hormone (FSH)
(b) human chorionic gonadotrophin
(c) luteinising hormone (LH)
(d) oestrogen
(e) testosterone - Answer b: the syncytiotrophoblast secretes hCG which maintains the
corpus luteum, which maintains the decidua
What is the final maturation process of spermatozoa that occurs in the female genital system?
(a) acrosome reaction
(b) capacitation
(c) cortical reaction
(d) spermatocytogenesis
(e) spermiogenesis - Answer b. Capacitation: When mature sperm enter the female system
they become hyperactive (from removal of cholesterole and increase in calcium uptake)
The acrosome and cortical reactions help prevent fertilisation of an ovum by more than one
sperm. Which structure also helps prevent this?
, (a) cortical granules
(b) cumulus cells
(c) fimbrae
(d) plasma membrane
(e) zona pellucida - Answer a: cortical granules are released by the ovum to prevent further
entry from other sperm
Which structure is not formed from mesoderm?
(a) bone
(b) bone marrow
(c) dermis
(d) epidermis
(e) ureter - Answer d: epidermis
Which structure is not formed from endoderm?
(a) kidneys
(b) liver
(c) pancreas
(d) parathyroid glands
(e) tonsils - Answer a: Kidneys
Which structure is not formed from ectoderm?
(a) epidermis
(b) central nervous system
(c) peripheral nervous system
(d) retina
(e) thymus gland - Answer a: thymus gland
How many days after fertilisation does the blastocyst begin to implant into the uterine
endometrium?
(a) 3 days
(b) 6 days
(c) 10 days
(d) 14 days
(e) 21 days - Answer b. 6 days
