QuestionSBA
QuestionChoice
This is true. Most ectopic pregnancies implant in the fallopian tube. They may also implant in the ovary, abdomen and cervix, although this is uncommon. This is a serious complication for the mother.
10004901
a
Ectopic pregnancies most often occur in the fallopian tubes
QuestionChoice
The sperm interacts with the ZP3 receptor, which is a human-specific sperm receptor. It allows the sperm to penetrate the surrounding egg-protective zona pellucida membrane.
10004903
c
Sperm interacts with the ZP2 receptor to enter the egg
QuestionChoice
This is untrue as the first two cell types the cell differentiates into are the trophoblast and inner cell mass. The inner cell mass then proceeds to divide into epiblast and hypoblast.
10004905
e
The first two cell types the cell differentiates into are trophoblast and epiblast
QuestionChoice
Cleavage divisions occur in the first 24 hours and are accompanied by an increase in cell number, not an increase in cell size. Compaction allows the cells to fit in the zona pellucida membrane.
10004904
d
Cleavage divisions occur in the first 24 hours and are accompanied by cell growth
QuestionChoice
Fertilisation occurs in the ampulla of the fallopian tube, also known as an oviduct. It implants in the uterine wall approximately six days after ovulation.
10004902
b
Fertilisation occurs in the uterine wall
Concept
Chapter
2693
4344
Fertilisation
Topic
171
Embryology
13527
Which of the following statements is correct regarding fertilisation?
a