A nurse is teaching a client who is prescribed COCs about the mechanism of action of these pills.
The nurse should explain that COCs prevent pregnancy by?
Inhibiting the production of follicle-stimulating hormone (FSH) and luteinizing hormone (LH)
Increasing the production of prostaglandins that cause uterine contractions
Decreasing the permeability of the fallopian tubes to sperm and egg
Suppressing ovulation, thickening cervical mucus and altering the uterine lining
The Correct Answer is A
The correct answer is choice A. COCs prevent pregnancy by inhibiting the production of follicle-stimulating hormone (FSH) and luteinizing hormone (LH), which are responsible for ovulation.
By suppressing ovulation, COCs prevent the release of a mature egg that can be fertilized by sperm.
Choice B is wrong because COCs do not increase the production of prostaglandins that cause uterine contractions.
Prostaglandins are involved in inflammation and pain, and are not directly related to contraception.
Choice C is wrong because COCs do not decrease the permeability of the fallopian tubes to sperm and egg.
The fallopian tubes are the site of fertilization, and COCs do not affect their function.
Choice D is partially correct but not the best answer. COCs do suppress ovulation, but they also have other mechanisms of action, such as thickening cervical mucus and altering the uterine lining.
These effects make it harder for sperm to reach the egg and for a fertilized egg to implant in the uterus.
Therefore, choice D does not capture the full mechanism of action of COCs.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
The correct answer is choice A.Mennorhagia is a contraindication for the use of an intrauterine device (IUD) for contraception because it can cause heavy or prolonged menstrual bleeding.This can lead to anemia, infection, or expulsion of the device.
Choice B is wrong because ovarian cysts are not a contraindication for IUD use.They are usually benign and do not interfere with the placement or function of the device.
Choice C is wrong because fibrocystic breast disease is not a contraindication for IUD use.It is a common condition that causes benign lumps in the breast tissue and does not affect the hormonal balance or the risk of infection.
Choice D is wrong because endometriosis is not a contraindication for IUD use.In fact, some types of IUDs that release progestin can help reduce the symptoms of endometriosis by thinning the endometrial lining and suppressing ovulation.
Correct Answer is A
Explanation
The correct answer is choice A.History of migraine headaches with aura is a contraindication for using COCs because it increases the risk of stroke.
Some possible explanations for the other choices are:
- Choice B is wrong because history of dysmenorrhea and menorrhagia is not a contraindication for using COCs.In fact, COCs may help reduce menstrual pain and bleeding.
- Choice C is wrong because history of acne vulgaris and hirsutism is not a contraindication for using COCs.In fact, COCs may help improve acne and hirsutism by reducing androgen levels.
- Choice D is wrong because history of iron-deficiency anemia and fatigue is not a contraindication for using COCs.In fact, COCs may help prevent iron-deficiency anemia by reducing menstrual blood loss.
Normal ranges for relevant parameters are:
- Blood pressure: <140/90 mmHg
- Body mass index: 18.5–24.9 kg/m
- Hemoglobin: 12–16 g/dL for women
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