1) Events in the process of fertilization:
A) The sperm nucleus (23 paternal chromosomes) and the egg nucleus (23 maternal chromosomes) fuse to form the zygote.
B) Sperm travel a path through the corona radiata, a loose collection of follicle cells.
C) From the acrosome, sperm cells release digesting enzymes.
D) The zona pellucida (a protein-carbohydrate structure) layer and the egg's plasma membrane are penetrated by sperm.
The process of fertilization proceeds in a specific sequence to form the first new cell of new life. The correct sequence to complete the fertilization of the egg is?
2) A blastocyst differs from the spherical 16-cell morula in that the blastocyst is a sphere that contains
A) An inner cell mass with germ layers that will develop into the embryo
B) An inner cell mass with germ layers that nourish the developing embryo
C) A trophoblast with germ layers that will develop into the embryo
D) A trophoblast that forms the embryo and an inner cell mass that nourishes the developing embryo
3) The outer layer of the blastocyst, the trophoblast, will develop into the
A) Placenta, which will form the chorion
B) Germ layers, which will arise into the various systems of the human body
C) Chorion, which will form the placenta
D) Germ layers, which provide immunity for the developing embryo
4) After successful implantation, the trophoblast of the blastocyst starts to secrete
A) LH
B) hCG
C) PRL
D) FSH
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