NCLEX : Reproductive Physiology
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Example Question #371 : Nclex
Which of the following is a normal dehydroepiandrosterone (DHEA) level in an adult female under the age of fifty?
Normal DHEA levels in an adult female under the age of fifty range from 
Example Question #372 : Nclex
Which of the following is a normal dehydroepiandrosterone (DHEA) level in an adult male under the age of fifty?
The normal DHEA levels in an adult male under the age of fifty can range from 
Example Question #373 : Nclex
Which of the following is not a function of progesterone during pregnancy?
Decreases maternal immune response to the fetus
Breast maturation in preparation for lactation
Increases the contractility of the uterus
Inhibits lactation during pregnancy
Breast maturation in preparation for lactation
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 #374 : Nclex
Which of the following proteins initiates male sexual development in utero?
Testis-determining factor
Testosterone-sensitizing protein
Male-determining protein
Masculinization factor
Testis-determining factor
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 #375 : Nclex
The Sertoli cells of the testes secrete all of the following except __________.
Estradiol
All of these are secreted by the Sertoli cells
Anti-Müllerian hormone
Androgen binding protein
All of these are secreted by the Sertoli cells
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 #376 : Nclex
Which of the following is the term used to describe the post-ejaculatory transformation of sperm via enzymes in the uterus and seminal fluid?
Spermatazoal maturation
Capacitation
Penultimation
Decapitation
Capacitation
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 #75 : General Biology
Which of the following minerals stabilizes sperm cell chromatin?
Magnesium
Manganese
Zinc
Copper
Zinc
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 #75 : General Biology
The average ejaculate contains how many sperm?
50 - 100 million
100 - 400 million
500 - 800 million
700-900 million
100 - 400 million
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 #76 : General Biology
What is the main source of energy for sperm cells in ejaculate?
Starch
Fructose
Sucrose
Galactose
Fructose
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 #21 : Reproductive Physiology
Where are mature spermatozoa stored before ejaculation?
In the seminal vesicles
In the vas deferens
In the seminiferous tubules
In the epididymis
In the epididymis
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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