A 14-year-old boy is at the pediatric clinic for a checkup. What physical changes of puberty will the nurse indicate are related to the production of testosterone?

Decrease in production of sebaceous gland secretions

Increase in muscle mass and strength

Stimulation of production of white cells and platelets

Promotion of growth of small bones

Answer and Explanation

The Correct Answer is B

A. Decrease in production of sebaceous gland secretions is incorrect. Testosterone actually increases sebaceous gland activity, leading to an increase in oil production, which can contribute to acne during puberty.

B. Increase in muscle mass and strength is correct. Testosterone plays a key role in the development of secondary male characteristics, including increased muscle mass, strength, and the growth of larger bones.

C. Stimulation of production of white cells and platelets is incorrect. While testosterone affects many bodily functions, it does not directly stimulate the production of white cells or platelets.

D. Promotion of growth of small bones is incorrect. Testosterone is more closely associated with the growth and development of larger bones (e.g., long bones), leading to height increases during puberty. It does not promote the growth of small bones.

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Correct Answer is B

Explanation

A. Implantation of the zygote does not affect the determination of biological sex. The biological sex is already determined at the time of fertilization.

B. Sex chromosomes (XX for female and XY for male) determine biological sex. This combination is established at fertilization when the sperm and egg combine to form the zygote.

C. The foramen ovale is a hole in the fetal heart that allows blood to bypass the lungs in utero and is unrelated to the determination of biological sex.

D. The blastocyst formation is an early developmental stage after fertilization but does not determine biological sex. It is the combination of sex chromosomes that determines whether the fetus is male or female.

A. The testes being too warm B. The penis and testes being small C. Infrequent sexual intercourse D. The man not being circumcised

Correct Answer is A

Explanation

A. Sperm production is temperature-sensitive, and the testes require a slightly cooler environment than the rest of the body. Increased warmth, such as from tight clothing, prolonged sitting, or heat exposure, can impair spermatogenesis.

B. The size of the penis and testes is not directly correlated with sperm production. The functionality of the testes, not their size, determines sperm output.

C. Infrequent sexual intercourse can affect fertility by decreasing opportunities for conception but does not directly decrease sperm production.

D. Circumcision status does not affect sperm production, as it primarily pertains to hygiene and the prevention of certain infections.

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A 14-year-old boy is at the pediatric clinic for a checkup. What physical changes of puberty will the nurse indicate are related to the production of testosterone?

Nursing Test Bank

Naxlex Comprehensive Predictor Exams

A nurse is assisting in the care of a client at 10 weeks of gestation who asks how the biological sex of the fetus is determined. Which of the following responses should the nurse make?

Correct Answer is B

Explanation

The nurse is speaking with a couple trying to conceive a child. What will the nurse remind the couple is a factor that can decrease sperm production?

Correct Answer is A

Explanation

A mother is anxious about her ability to breastfeed after her child is born because of her small breast size. What would be an important point to teach this mother?

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