If only a small volume of sperm is discharged into the vagina, an ...

[notis]

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. What would be the result for pregnancy?
 
  1. The block to polyspermy (cortical reaction) would not occur.
  2. The fertilized ovum would be unable to implant in the uterus.
  3. Sperm would be unable to penetrate the zona pellucida of the ovum.
  4. Peristalsis of the fallopian tube would decrease, making it difficult for the ovum to enter the uterus.

Question 2

The nurse instructs a client about conception and fetal development. Which client statement indicates understanding about transportation time of the zygote through the fallopian tube and into the cavity of the uterus?
 
  1. It will take 8 days for the egg to reach the uterus.
  2. It will take at least 3 days for the egg to reach the uterus.
  3. It will take 18 hours for the fertilized egg to implant in the uterus.
  4. It will only take 12 hours for the egg to go through the fallopian tube.

[vkodali]

Answer to Question 1

3
Explanation:
1. The answer choice of the block to polyspermy (cortical reaction) not occurring is incorrect because it is mediated by release of materials from cortical granules below the ovum's surface and not the result of low sperm count.
2. With a low sperm count it is unlikely that the ovum would be fertilized.
3. Sperm would be unable to penetrate the zona pellucida of the ovum because it takes hundreds of acrosomes (the result of the acrosomal reaction) to rupture and release enough hyaluronic acid to clear the way for a single sperm to penetrate the ovum's zona pellucida successfully.
4. Peristalsis of the fallopian tube would decrease, making it difficult for the ovum to enter the uterus is an incorrect statement.

Answer to Question 2

2
Explanation:
1. It will take 8 days for the egg to reach the uterus is an incorrect interpretation of the information on conception.
2. It takes at least 3 days for the egg to reach the uterus.
3. It will take 18 hours for the fertilized egg to implant in the uterus is an incorrect interpretation of the information on conception.
4. It will only take 12 hours for the egg to go through the fallopian tube is an incorrect interpretation of the information on conception.