A pregnant client asks about the functions of the placenta.Which of the following items should the nurse NOT include in the teaching plan?

Fetal nutrition and excretion are carried out by the placenta.

Fetal respirations are carried out by the placenta.

The placenta filters harmful substances from maternal blood.

The placenta receives maternal blood from the uterine arteries.

Answer and Explanation

The Correct Answer is C

Choice A rationale

Fetal nutrition and excretion are carried out by the placenta. This statement is correct. The placenta provides essential nutrients to the fetus and removes waste products from fetal blood.

Choice B rationale

Fetal respirations are carried out by the placenta. This statement is correct. The placenta facilitates gas exchange, providing oxygen to the fetus and removing carbon dioxide.

Choice C rationale

The placenta filters harmful substances from maternal blood. This statement is incorrect. While the placenta provides some barrier function, it does not filter all harmful substances from maternal blood, and certain drugs and toxins can cross the placental barrier and affect the fetus.

Choice D rationale

The placenta receives maternal blood from the uterine arteries. This statement is correct. Maternal blood flows to the placenta via the uterine arteries, supplying oxygen and nutrients to the fetal side of the placenta.

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Correct Answer is A

Explanation

Choice A rationale

50% of the offspring have a chance of developing the disease from the affected parent. Autosomal dominant inheritance means that a single copy of the altered gene in each cell is sufficient to cause the disorder. Thus, each child of an affected parent has a 50% chance of inheriting the condition.

Choice B rationale

Diseases transmitted from a carrier mother to her son typically describe X-linked recessive inheritance, not autosomal dominant. In autosomal dominant conditions, both males and females can be affected, and it doesn't depend on the sex of the parent transmitting the gene.

Choice C rationale

All of the offspring will develop the disease is incorrect. In autosomal dominant inheritance, there is a 50% chance of passing the altered gene to the offspring, not 100%.

Choice D rationale

50% of the offspring will be carriers of the disease from the affected parent is incorrect for autosomal dominant inheritance. There are no "carriers" in autosomal dominant diseases; individuals either have the disease or they don't, based on whether they inherit the altered gene.

A. This is a possible sign of pregnancy. B. This is a positive sign of pregnancy. C. This is a presumptive sign of pregnancy. D. This is a probable sign of pregnancy.

Correct Answer is B

Explanation

Choice A rationale

Possible signs of pregnancy include symptoms like nausea, but feeling the baby move is not one of them.

Choice B rationale

Feeling fetal movements felt by both the mother and examiner is a positive sign of pregnancy as it confirms fetal presence.

Choice C rationale

Presumptive signs of pregnancy are symptoms felt by the woman, such as missed periods, but not confirmed fetal movements.

Choice D rationale

Probable signs include changes observed by an examiner, like a positive pregnancy test, but not confirmed fetal movements.

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A pregnant client asks about the functions of the placenta.Which of the following items should the nurse NOT include in the teaching plan?

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Naxlex Comprehensive Predictor Exams

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Correct Answer is A

Explanation

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Correct Answer is B

Explanation

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