Explain the Molecular Basis of Fertilization Flashcards

Order of prenatal development

Process that makes it possible for sperm to penetrate the egg is called

In the slow block to polyspermy, sperm penetration releases an inflow of ___________, which in turn stimulates the ________.

In the fast block to polyspermy, binding of sperm opens up _________ channels, which depolarizes the egg membrane and _________

The optimal "window of opportunity" to conceive a child is

The spheroidal stage of early prenatal development with about 16 to 64 cells is called a/an

Twins produced when a single egg is fertilized are called _____________ twins, and twins produced from two eggs ovulated at the same time are called ___________ twins

In the blastocyst, the trophoblast will become ____________, whereas the embryoblast will become __________

Primary germ layers are formed during

Mesenchyme gives rise to

During implantation, the trophoblast divides into a deep layer, the _________, composed of individual cells, and a superficial layer, the ___________, composed of a multinucleate mass of cytoplasm

By the time the conceptus arrives in the uterus

Out of the 300 million ejaculated sperm, only about ____________ reach the vicinity of the egg

Prior to ejaculation, __________ in the sperm plasma membrane prevents premature release of ______________

These are derivatives of ectoderm except