If only a small volume of sperm is discharged into the vagina, an insufficient amount of enzymes might be released when sperm encounters the ovum. In that case, pregnancy would probably not result because:
A)Peristalsis of the fallopian tube would decrease, making it difficult for the ovum to enter the uterus.
B)The block to polyspermy (cortical reaction) would not occur.
C)The fertilized ovum would be unable to implant in the uterus.
D)Sperm would be unable to penetrate the zona pellucida of the ovum.

Question

Quizplus · Accepted Answer

The enzymes released by sperm are crucial for breaking down the zona pellucida, the protective outer layer of the ovum, allowing one sperm to penetrate and fertilize the egg. If insufficient enzymes are released due to a small volume of sperm, sperm penetration through the zona pellucida would be hindered, preventing fertilization.

If Only a Small Volume of Sperm Is Discharged into the Vagina