Embryology MCQ Notes

Embryology MCQ Notes

• Question 1: If a zygote undergoes mitosis to form two blastomeres, what is the name of the larger blastomere?

  • Answer: Macromer

• Question 2: If a zygote undergoes mitosis to form two blastomeres, what is the name of the smaller blastomere?

  • Answer: Micromer

• Question 3: How long does it take for a human zygote to develop two blastomeres after fertilization?

  • Answer: 3 hours

• Question 4: What process is used in the division of cells after successful fertilization?

  • Answer: Cleavage

• Question 5: What is the name given to a zygote with 16-32 blastomeres?

  • Answer: Morula

Additional Embryology Information

• Question 6: What is the typical outcome of fertilization?

  • Answer: Zygote

• Question 7: Define fertilization.

  • Answer: Fusion of male and female gametes

• Question 8: Define ovulation.

  • Answer: Release of the secondary oocyte from the ovary

• Question 9: Where do sperms meet the egg for the first time?

  • Answer: Ampulla of the fallopian tube

• Question 10: What happens to the fertilized egg after successful fertilization?

  • Answer: Implantation in the uterus

• Question 11: What is the name for the released female gamete from the ovary?

  • Answer: Secondary Oocyte

• Question 12: Typically, where does implantation occur?

  • Answer: Endometrium of the uterus

• Question 13: How many days after fertilization does implantation normally occur?

  • Answer: 3 to 4 days or 5 to 6 days following fertilization.

• Question 14: How many oocytes are typically released during ovulation per month?

  • Answer: One

• Question 15: How many sperms normally enter an oocyte?

  • Answer: One

• Question 16: What is the outer layer of the blastocyst called?

  • Answer: Trophoblast

• Question 17: What is the name of the inner cell mass within the blastocyst?

  • Answer: Embryoblast

• Question 18: How many layers does the inner cell mass consist of within the blastocyst?

  • Answer: Two layers

• Question 19: What is the outer layer of the inner cell mass called?

  • Answer: Epiblast

• Question 20: What is the inner layer of the inner cell mass called?

  • Answer: Hypoblast

• Question 21: What is the first cavity formed within a blastocyst?

  • Answer: Blastocyst cavity

• Question 22: What part of the blastocyst gives rise to the embryo?

  • Answer: Inner cell mass

• Question 23: What part of the blastocyst develops into the placenta and fetal membranes?

  • Answer: Trophoblast

• Question 24: When does the bilaminar germ disc form?

  • Answer: During the early stages of embryonic development

• Question 25: Where is the primitive streak located?

  • Answer: On the epiblast

• Question 26: What process transforms a bilaminar disc into a trilaminar disc?

  • Answer: Gastrulation

• Question 27: Which structure is not associated with the trilaminar disc?

  • Answer: Syncytiotrophoblast

• Question 28: What gives rise to the definitive mesoderm layer during gastrulation?

  • Answer: Ectoderm and Endoderm

• Question 29: Which part of the ectoderm becomes the neural groove?

  • Answer: Neuroectoderm

• Question 30: What structures arise from the primitive streak?

  • Answer: Several structures, including the notochord, and the primitive node

• (...and so on, continuing with the questions and answers in the order they appear, up to question 130.)

Test your knowledge with these multiple-choice questions related to embryology. Covering key concepts such as zygote formation, cleavage, and the development of blastomeres, this quiz is perfect for students seeking to understand the early stages of embryonic development.