A nurse is discussing fetal circulation with a group of nursing students.The ductus venosus, foramen ovale, and ductus arteriosus are key factors in fetal circulation.Which of the following explains the purpose of these shunts in fetal circulation?
To bypass the lungs and direct oxygenated blood to the brain and body.
To ensure proper development of the fetal heart.
To regulate blood pressure in the fetus.
To facilitate gas exchange in the lungs.
The Correct Answer is A
Choice A rationale
The ductus venosus, foramen ovale, and ductus arteriosus are shunts in fetal circulation that bypass the lungs and liver, directing oxygenated blood to the brain and body. The foramen ovale allows blood to flow from the right atrium to the left atrium, bypassing the lungs. The ductus arteriosus connects the pulmonary artery to the aorta, allowing blood to bypass the lungs. The ductus venosus shunts blood from the umbilical vein to the inferior vena cava, bypassing the liver.
Choice B rationale
This choice is incorrect because the primary purpose of these shunts is not to ensure proper development of the fetal heart. While they do play a role in directing blood flow, their main function is to bypass the non-functional fetal lungs and liver.
Choice C rationale
This choice is incorrect because the shunts are not primarily involved in regulating blood pressure in the fetus. Their main function is to direct oxygenated blood to vital organs like the brain and heart.
Choice D rationale
This choice is incorrect because the shunts bypass the lungs, which are not yet functional in the fetus. Gas exchange occurs in the placenta, not the fetal lungs.
Free Nursing Test Bank
- Free Pharmacology Quiz 1
- Free Medical-Surgical Quiz 2
- Free Fundamentals Quiz 3
- Free Maternal-Newborn Quiz 4
- Free Anatomy and Physiology Quiz 5
- Free Obstetrics and Pediatrics Quiz 6
- Free Fluid and Electrolytes Quiz 7
- Free Community Health Quiz 8
- Free Promoting Health across the Lifespan Quiz 9
- Free Multidimensional Care Quiz 10
View Related questions
Correct Answer is B
Explanation
Choice A rationale
This response is dismissive and does not address the client’s feelings. It may make the client feel invalidated and unsupported.
Choice B rationale
This response acknowledges that ambivalent feelings are common in early pregnancy. It normalizes the client’s feelings and provides reassurance, which is appropriate and supportive.
Choice C rationale
This response imposes an expectation of happiness on the client, which may make her feel guilty or inadequate for not feeling happy. It does not validate her current feelings.
Choice D rationale
This response redirects the client’s feelings to another person (her mother) rather than addressing them directly. It may not be helpful if the client does not have a supportive relationship with her mother.
Correct Answer is C
Explanation
Choice A rationale
Heartburn and nausea are common symptoms during pregnancy and are not typically considered warning signs that require immediate medical attention.
Choice B rationale
Amenorrhea, or the absence of menstruation, is a normal sign of pregnancy and does not indicate a complication that needs immediate reporting.
Choice C rationale
Abdominal cramping can be a sign of a serious condition such as ectopic pregnancy or miscarriage, and it is important for the client to report this symptom immediately.
Choice D rationale
Urinary frequency is a common symptom during pregnancy due to hormonal changes and the growing uterus pressing on the bladder. It is not typically a warning sign that requires immediate medical attention.