NCLEX-RN : General Biology
Study concepts, example questions & explanations for NCLEX-RN
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Example Questions
Example Question #1 : Reproductive Physiology
What is the most abundant circulating steroid hormone in humans?
Aldosterone
Pregnenolone
Dehydroepiandrosterone (DHEA)
Cortisol
Dehydroepiandrosterone (DHEA)
The most abundant circulating steroid hormone in the human body is Dehydroepiandrosterone (DHEA). DHEA is a precursor to several important sex hormones including testosterone and estrogen. It also functions as a neuroactive steroid.
Example Question #2 : Reproductive Physiology
Which of the following hormones is secreted by the corpus luteum in order to prepare the endometrium for implantation of a fertilized ovum?
Pregnenolone
Estrogen
Progesterone
Lutenizing hormone
Progesterone
The hormone that is secreted by the corpus luteum in order to prepare the endometrium for implantation of a fertilized ovum is progesterone. Progesterone prevents the constriction of blood vessels to the endometrium, which in turn prevents the shedding of the endometrial lining (menses). It also alters the endometrium, converting it to it's secretory phase in preparation for implantation.
Example Question #1 : Reproductive Physiology
Which of the following is a normal value of follicle-stimulating hormone (FSH) for a menstruating adult female?
Normal FSH values for a menstruating adult female are 
Example Question #3 : Reproductive Physiology
What is the function of follicle-stimulating hormone in a menstruating woman?
It stimulates the formation of the corpus luteum
It stimulates the maturation of follicles in the ovary
It triggers the rupture and release of the mature egg from the follicle
It stimulates follicles of the uterus in preparation for implantation
It stimulates the maturation of follicles in the ovary
In a menstruating woman, follicle-stimulating hormone stimulates the maturation of follicles in the ovary. Rupture of the mature follicle and formation of the corpus luteum are both stimulated by lutenizing hormone (LH). The uterus itself does not contain follicles.
Example Question #1 : Reproductive Physiology
Which of the following is a normal follicle-stimulating hormone (FSH) level in an adult male?
In an adult male, normal FSH can range from 
Example Question #4 : Reproductive Physiology
Which of the following is a function of follicle stimulating hormone (FSH) in an adult male?
All of these
It triggers the initiation of spermatogenesis
It stimulates the Sertoli cells of the testes to produce androgen-binding protein
It stimulates primary spermatocytes to undergo meiosis
All of these
In a healthy adult male, follicle stimulating hormone stimulates the Sertoli cells of the testes to produce androgen-binding protein, it stimulates primary spermatocytes to undergo meiosis, and triggers the initiation of spermatogenesis.
Example Question #51 : General Biology
Which of the following is not a function of luteinizing hormone (LH) in a menstruating female?
It stimulates the maturation of follicles within the ovary
It stimulates the production of estrogen by the ovary
It triggers the development of the corpus luteum
It triggers the release of the mature egg during ovulation
It stimulates the maturation of follicles within the ovary
Luteinizing hormone stimulates the production of estrogen by the ovary, triggers the release of the mature egg during ovulation, and then stimulates the ruptured follicle to develop into the corpus luteum, the structure responsible for providing progesterone to the endometrium in preparation for implantation, if a pregnancy were to occur.
Example Question #1 : Reproductive Physiology
Which of the following is a normal value for luteinizing hormone (LH) in an adult female experiencing normal menstrual cycles?
All of these
All of these
In a menstruating female, LH values can vary widely during the menstrual cycle. It is its highest at the peak of the menstrual cycle 
Example Question #51 : Other General Biology
Which of the following is a normal value for luteinizing hormone (LH) in an adult male?
Normal LH values for an adult male range from 
Example Question #51 : General Biology
What is the function of luteinizing hormone (LH) in an adult male?
It triggers the production of testosterone by the Sertoli cells of the testes
It triggers sperm production in the seminiferous tubules
It triggers the conversion of testosterone into dihydrotestosterone
It triggers the production of testosterone by the Leydig cells in the testes
It triggers the production of testosterone by the Leydig cells in the testes
In an adult male, luteinizing hormone triggers the production of testosterone by the Leydig (interstitial) cells in the testes. Testosterone is converted to DHT (dihydrotestosterone) by the enzyme 5-alpha reductase. Sperm production and maturation is triggered by follicle-stimulating hormone (FSH) rather than LH in adult males.
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