The maternity nurse understands that vascular volume increases 40% to 45% during pregnancy to:
compensate for decreased renal plasma flow.
prevent maternal and fetal dehydration.
provide adequate perfusion of the placenta.
eliminate metabolic wastes of the mother.
The Correct Answer is C
Choice A reason: Vascular volume increases during pregnancy to meet the increased oxygen and nutrient demands of the fetus, not to compensate for decreased renal plasma flow. In fact, renal plasma flow increases by 50% to 80% during pregnancy to facilitate the excretion of metabolic wastes.
Choice B reason: Vascular volume increases during pregnancy to ensure adequate blood supply to the uterus and other organs, not to prevent maternal and fetal dehydration. Dehydration can occur due to vomiting, diarrhea, or inadequate fluid intake, and it can be prevented by drinking enough fluids and replacing electrolytes.
Choice C reason: Vascular volume increases during pregnancy to provide adequate perfusion of the placenta, which is the main organ of gas exchange and nutrient delivery for the fetus. The placenta receives about 10% of the maternal cardiac output at term.
Choice D reason: Vascular volume increases during pregnancy to support the growth and development of the fetus and the maternal tissues, not to eliminate metabolic wastes of the mother. Metabolic wastes are eliminated by the kidneys, lungs, skin, and gastrointestinal tract.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["B","C","D"]
Explanation
Choice A reason: Abstinence is the avoidance of sexual activity, which reduces the risk of exposure to STIs. It is not a sexual risk behavior.
Choice B reason: Multiple sex partners increases the likelihood of exposure to STIs, especially if the partners are not tested or treated. It is a sexual risk behavior.
Choice C reason: Unprotected anal intercourse exposes the mucous membranes of the rectum and anus to potential pathogens, which can cause STIs such as gonorrhea, chlamydia, syphilis, and HIV. It is a sexual risk behavior.
Choice D reason: Oral sex involves contact between the mouth and the genitals or anus, which can transmit STIs such as herpes, HPV, gonorrhea, and syphilis. It is a sexual risk behavior.
Choice E reason: Dry kissing is the contact between the lips without the exchange of saliva, which does not transmit STIs. It is not a sexual risk behavior.
Correct Answer is A
Explanation
Choice A reason: A previous birth of a large infant (macrosomia) is a risk factor for gestational diabetes mellitus (GDM). A large infant may indicate that the mother had high blood glucose levels during pregnancy, which can cause the fetus to grow larger than normal. Women who have had a large infant are more likely to develop GDM in subsequent pregnancies.
Choice B reason: Underweight before pregnancy is not a risk factor for GDM. In fact, being overweight or obese before pregnancy is a risk factor for GDM, as it increases insulin resistance and makes it harder for the body to use glucose effectively.
Choice C reason: A previous diagnosis of type 2 diabetes mellitus is not a risk factor for GDM. It is a contraindication for GDM, as it means that the woman already has diabetes before pregnancy. GDM is a condition that develops during pregnancy and usually resolves after delivery.
Choice D reason: Maternal age younger than 25 years is not a risk factor for GDM. In fact, being older than 25 years is a risk factor for GDM, as it increases the risk of insulin resistance and other metabolic changes that can affect glucose tolerance.
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