Nursing Elites

1. Which of the following is a function of the placenta?

• A. The placenta secretes insulin.
• B. The placenta facilitates the exchange of gases and nutrients between mother and fetus.
• C. The placenta provides immunological protection to the fetus.
• D. The placenta stores fat-soluble vitamins for the fetus.

Correct answer: B

Rationale: The correct answer is B. The placenta serves as a crucial organ during pregnancy, facilitating the exchange of gases (oxygen and carbon dioxide) and nutrients (such as glucose and amino acids) between the mother and the developing fetus. This exchange is vital for the fetus's growth and development. Choices A, C, and D are incorrect. The placenta does not secrete insulin; insulin is produced by the pancreas. While the placenta provides some immune support to the fetus, its main role is not immunological protection. Additionally, storing fat-soluble vitamins is not a primary function of the placenta.

2. Which hormone is primarily responsible for the development of female secondary sexual characteristics?

• A. Progesterone
• B. Testosterone
• C. Estrogen
• D. Oxytocin

Correct answer: C

Rationale: Estrogen is primarily responsible for the development of female secondary sexual characteristics. Progesterone, while important in the menstrual cycle and pregnancy, is not primarily responsible for secondary sexual characteristics. Testosterone is the primary male sex hormone. Oxytocin is involved in labor, lactation, and social bonding, but not in the development of female secondary sexual characteristics.

3. Complete abortion is characterized by:

• A. Os closed.
• B. Firm contracted uterus.
• C. Heavy bleeding.
• D. Heavy cramping.

Correct answer: A

Rationale: Complete abortion is characterized by a firm contracted uterus with a closed os. This closure of the os indicates that the products of conception have been completely expelled from the uterus. Choices B, C, and D are incorrect because a firm contracted uterus with a closed os is the hallmark sign of a complete abortion, not heavy bleeding, heavy cramping, or any other features.

4. Which of the following are signs and symptoms of vaginitis EXCEPT?

• A. Vaginal itching and irritation
• B. Heavy vaginal bleeding
• C. Pain during coitus
• D. Painful urination

Correct answer: B

Rationale: Vaginitis is characterized by symptoms such as vaginal itching, irritation, pain during coitus, and painful urination. However, heavy vaginal bleeding is not typically associated with vaginitis. Vaginal bleeding could be indicative of other conditions like cervical or endometrial issues, but it is not a common symptom of vaginitis.

5. How many autosomes does a human primary spermatocyte have?

• A. 34
• B. 44
• C. 54
• D. 33

Correct answer: B

Rationale: A human primary spermatocyte has 44 autosomes. Autosomes are chromosomes that are not involved in determining an individual's sex. In humans, there are a total of 46 chromosomes in a somatic cell, with 22 pairs of autosomes and one pair of sex chromosomes. Therefore, the correct answer is 44 autosomes, making choice B the correct answer. Choices A, C, and D are incorrect as they do not represent the accurate number of autosomes in a human primary spermatocyte.

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