Chapter 23 | Male Reproductive

What is the main function of the male gonads in the reproductive system?

Which hormone is predominantly secreted by the testes in males?

How does male gonadotropin secretion differ from females?

What happens to male gonadal function with advancing age?

In terms of DNA, what is the main source from the male reproductive system?

Which hormone is masculinizing in its action in males?

What is the role of olfactory receptors in spermatozoa?

What is the function of P2X receptors in male ejaculation?

Where do spermatozoa slow down and undergo capacitation?

What is the significance of maintaining testes at a lower temperature?

What are the ligand gated cation channels that respond to ATP in male ejaculation?

What is the main nutritional supply for spermatozoa?

Where is the temperature of the testes normally maintained?

Which hormone causes an increase in body hair but a decrease in scalp hair?

What is responsible for the fusion of epiphyses to the long bones?

What process results from testosterone binding to an intracellular receptor?

Which hormone limits the usefulness of testosterone as an anabolic agent in patients with wasting diseases?

What enzyme converts testosterone to DHT in some target cells?

What is the role of androgen in the maturation of spermatids to spermatozoa?

Which hormone acts on Sertoli cells to promote the last stages of spermatid maturation?

Where do spermatozoa acquire motility during their development?

What is the importance of motility for spermatozoa in vivo?

What proteins are responsible for the acquired motility of spermatozoa in the epididymis?

What happens to sperm from knockout mice that do not express CatSper1-4?

What is the role of FSH in the male reproductive system?

How does LH affect Leydig cells?

What feedback mechanism does testosterone have on LH secretion?

What is the impact of hypothalamic lesions on testicular function?

What is the role of inhibin in the male reproductive system?

What are the subunits that form inhibins in the male reproductive system?

What is the function of the blood-testis barrier described in the passage?

Which cell type forms cytoplasmic bridges with germ cells to ensure their survival?

What is the role of tight junctions between adjacent Sertoli cells near the basal lamina?

What is the role of NO in the male reproductive system?

What is one of the functions attributed to the paracrine activity between Sertoli and Leydig cells?

How is erection terminated in the male reproductive system?

How do maturing germ cells navigate through the blood-testis barrier?

What initiates the process of ejaculation in males?

What is the significance of germ cells needing to stay in contact with Sertoli cells?

Which neurotransmitter is likely released by efferent parasympathetic fibers in the male reproductive system?

What is the main effect of androgens on protein synthesis and breakdown?

What is the enzyme responsible for converting testosterone to DHT in some target cells?

What is the effect of dihydrotestosterone (DHT) on hereditary baldness development?

How do androgens impact the fusion of epiphyses to long bones?

What limits the usefulness of exogenous testosterone as an anabolic agent in patients with wasting diseases?

Which ion retention is caused by androgens due to their anabolic effects?

What is the final stage of maturation for spermatids to become motile spermatozoa?

Which hormone is the principal hormone of the testis and plays a key role in the development of male secondary sex characteristics?

What is the rate at which testosterone is synthesized by Leydig cells under the control of luteinizing hormone in adult males?

Where is most of the testosterone found in the plasma after being synthesized?

What type of cell division occurs from a spermatogonium to a spermatid?

What is the primary function of inhibin B in adult men and women?

Where are inhibins and activins primarily produced in males and females?

What is the function of activins in the bone marrow?

How does castration impact FSH and LH secretion?

In the male reproductive system, what is the direct effect of inhibin on the anterior pituitary?

What is the role of the heterodimer βAβB in the male reproductive system?

What is the final stage of maturation for spermatids?

Where is testosterone synthesized in the male reproductive system?

What is the principal hormone of the testis?

Which hormone controls the secretion of testosterone from Leydig cells?

What is the main function of testosterone in the male reproductive system?

How is testosterone primarily transported in the plasma?

At what rate is testosterone synthesized by Leydig cells in adult males?

What type of cell division occurs from a spermatogonium to a spermatid?

What is the role of testosterone in spermatogenesis?