NCLEX : Reproductive Physiology

Study concepts, example questions & explanations for NCLEX

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Example Questions

Example Question #61 : Other General Biology

Which of the following is a normal dehydroepiandrosterone (DHEA) level in an adult female under the age of fifty?

Possible Answers:

Correct answer:

Explanation:

Normal DHEA levels in an adult female under the age of fifty range from . DHEA levels are higher in younger women and decline as women approach menopause.

Example Question #70 : General Biology

Which of the following is a normal dehydroepiandrosterone (DHEA) level in an adult male under the age of fifty?

Possible Answers:

Correct answer:

Explanation:

The normal DHEA levels in an adult male under the age of fifty can range from . They are highest in early adulthood and decline with age.

Example Question #21 : Reproductive Physiology

Which of the following is not a function of progesterone during pregnancy?

Possible Answers:

Decreases maternal immune response to the fetus

Increases the contractility of the uterus

Inhibits lactation during pregnancy

Breast maturation in preparation for lactation

Correct answer:

Breast maturation in preparation for lactation

Explanation:

Progesterone serves many functions in pregnancy. It prepares the endometrial lining for implantation of the embryo, it increases the contractility of the uterus, it inhibits lactation during pregnancy, and it is thought to reduce maternal immune response to the developing fetus. Breast enlargement and maturation in preparation for lactation is facilitated by estrogen, rather than progesterone.

Example Question #22 : Reproductive Physiology

Which of the following proteins initiates male sexual development in utero?

Possible Answers:

Male-determining protein

Testis-determining factor 

Masculinization factor

Testosterone-sensitizing protein

Correct answer:

Testis-determining factor 

Explanation:

Testis-determining factor, also known as sex-determining region Y (SRY) protein, is a sex-determining gene found exclusively on the Y-chromosome in humans. It's transcription triggers the development of male sexual characteristics in the developing fetus.

Example Question #23 : Reproductive Physiology

The Sertoli cells of the testes secrete all of the following except __________.

Possible Answers:

Estradiol 

All of these are secreted by the Sertoli cells

Anti-Müllerian hormone

Androgen binding protein

Correct answer:

All of these are secreted by the Sertoli cells

Explanation:

The Sertoli cells of the testes are responsible for the secretion of many substances, including anti-Müllerian hormone, androgen binding protein, glial cell line-derived neurotrophic factor, and estradiol.

Example Question #24 : Reproductive Physiology

Which of the following is the term used to describe the post-ejaculatory transformation of sperm via enzymes in the uterus and seminal fluid?

Possible Answers:

Capacitation

Penultimation

Decapitation

Spermatazoal maturation

Correct answer:

Capacitation

Explanation:

The process by which post-ejaculatory sperm is rendered fully mature and capable of fertilization of an ovum is called capacitation. This is where enzymes within the uterus are able to partially degrade the acrosome, the cap surrounding the head of the spermatazoa, allowing it to bind with and eventually penetrate the zona pellucida of the egg.

Example Question #21 : Reproductive Physiology

Which of the following minerals stabilizes sperm cell chromatin?

Possible Answers:

Zinc

Magnesium

Manganese

Copper

Correct answer:

Zinc

Explanation:

The stability of sperm cell chromatin is dependent on zinc. Zinc deficiency can cause sperm to be fragile, which in turn lowers sperm count and decreases male fertility.

Example Question #381 : Nclex

The average ejaculate contains how many sperm?

Possible Answers:

500 - 800 million

700-900 million

100 - 400 million

50 - 100 million

Correct answer:

100 - 400 million

Explanation:

Male ejaculate can contain any where from 40 million to 1 billion sperm, though the average ejaculate contains between 100 and 400 million. 

Example Question #27 : Reproductive Physiology

What is the main source of energy for sperm cells in ejaculate? 

Possible Answers:

Fructose

Sucrose

Starch 

Galactose

Correct answer:

Fructose

Explanation:

The primary energy source of spermatozoa is fructose, produced by the seminal vesicle along with multiple amino acids, vitamin C, enzimes, and flavin. 

Example Question #25 : Reproductive Physiology

Where are mature spermatozoa stored before ejaculation?

Possible Answers:

In the vas deferens

In the seminiferous tubules

In the epididymis 

In the seminal vesicles

Correct answer:

In the epididymis 

Explanation:

Fully formed spermatozoa from the seminal vesicles are transported to the epididymis, where they are stored for 2-3 months. During ejaculation, stored sperm are moved from the lower epididymis via peristaltic action of the muscle layers of the vas deferens, mixed with various fluids to form semen.  

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