The Sexual Function Of Laboratory Animals

While it is common for many sexual dysfunctions to be related to a medical condition, it is not true one hundred percent of the time. Certain sexual health issues, such as premature ejaculation, can be tied to an underlying medical malady, such as obesity. Yet, there are many men across the world who deal with premature ejaculation, erectile dysfunction, and delayed ejaculation who are otherwise perfectly healthy. This is not to say that the men in question

Testosterone is released from the leydig cells and circulates the body. Like estrogen, testosterone can enter the target cell, bypassing the cell membrane and is transported to the nucleus by a carrier protein. Testosterone is also a transcription factor in which testosterone binds to genes and influences the function. Depending on the type of cell, testosterone can be converted into another form before reaching the nucleus. Only about seven percent of circulating testosterone is converted to dihydrotestosterone (DHT) and less than one percent is converted to estrogen. Testosterone first takes effect in the womb, allowing male reproductive organs to differentiate from female organs. The presence or absence of testosterone determines whether a baby will be male or female. At the onset of maturity, testosterone also signals other cells in the testes to begin production of sperm. Secondary sex characteristics include hair distribution on the face and body, the deepening of the voice as testosterone causes a growth in the larynx, induced male pattern fat distribution, bone growth, increase in sex drive and behavior. The hypothalamus regulates the amount of testosterone circulating the body by releasing follicle stimulating hormone and luteinizing hormone (Nieschlag, Behre, and Nieschlag, 2012). Testosterone utilizes a negative feedback loop by acting upon the hypothalamus to inhibit GnRH release and on the pituitary

1. Based on the information provided about the regulation of testosterone secretion, propose a testable hypothesis to explain how trenbolone acetate caused Frank’s testicles to shrink.

Testosterone belongs to a class of male hormones called androgens that is vital for sexual and reproductive development. The National Institutes of Health regards “testosterone as the most important male hormone”(Rettner). Although the primary role of testosterone directly relates to males, women also produce testosterone at lower levels. Women’s total levels are about a “tenth to a twentieth of men’s levels”(Rettner). According to the Mayo Clinic, this hormone plays a role in sex drive, sperm production, fat distribution, red cell production, and maintenance of muscle strength and

Testosterone is a hormone that plays a vital role in men's health. Over time, or through various conditions, the testicular ability to produce testosterone levels declines, or fails, leaving men with lower than optimal testosterone levels. Testosterone gels for men, natural testosterone boosters, injections and patches are available to treat low levels.

double to individual ) - Individual consequences for a man with maturing differ from individual to person.For case - The level of testosterone discharged in a matured ladies fluctuates (Meston, C.M(1997, October).Aging and sexuality. The Western Journal of Medicine, 167(4), 285)).. A base sum testosterone discharge is needed for adequate sexual working. So a lady with less measure of testosterone discharged may not be willing to do sex.Therefore, the adjustment in one's sexual capacities with age may be computed by survey his/her entire lifespan. (Meston, C.M(1997, October).Aging and sexuality. The Western Journal of Medicine, 167(4),

Getting the testosterone level right is critical for a man, since it effects many of their daily

Luteinizing hormone releasing hormone (LHRH) agonists therapy may be used to enhance a negative feedback loop between the anterior pituitary and testicles, thus inhibiting the production of TST. LHRH agonists replicate the effects of endogenous luteinizing hormone which cause an acute rise in TST production — followed by a significant decrease in long term TST levels. LHRH antagonists may be used to disrupt the hypothalamic pituitary axis and inhibit the production of male sex androgens. The therapeutical index of LHRH antagonists may be greater than that of LHRH agonists because they do not cause the acute flare in TST as

"If you give a female rat a short burst of testosterone shortly after birth you end up with a female that demonstrates male behaviour. But there is a lot of argument about whether a similar thing occurs in humans."

Risky sexual and reproductive behavior associated with teen pregnancy often leads to disadvantage personal and social conditions. Research suggests that health education, contraceptive use, access to health care and outreach programs are effective in improving health conditions and reducing risky behavior. Omissions in the research on sexual behavior other than intercourse are highlighted. Possible biological, social, and social cognitive processes underlying teenage sexual behavior are then considered. Next, demographic trends in the use of contraceptives and antecedents of regular birth control use are reviewed. Finally, some of the successful program initiatives directed toward altering sexual and contraceptive practices are discussed, keeping

The male reproductive system is effect by the cause of oligospermia and azoospermia, decreased the testicular size, abnormal appearance of testicular biopsy material, and reductions in testosterone and gonadotropic hormones. The change in the body seen in the pituitary-gonadal which leads to the suppression of gonadotrophin production. The variations in these hormones can alter thyroid function and negative impact on glucose tolerance. The Abuse of steroids affects the male reproductive be reversible with cessation of steroid that can cause, although breast tissue changes and hair loss. It can lead to surgery needs of an

Reproductive disorder can occur in males and females, in some cases resulting in infertility in female and impotency in male. To prevent these complications early detection and treatment is recommended.

Reduced libido, impotence, male infertility, testicular of reduced volume and texture, soft, small prostate; or menstrual abnormalities, amenorrhea, hypotension peripartum, atrophy of the breasts, the vagina, the labia majora, osteoporosis, premature atherosclerosis oriented in both sexes to a secondary hypogonadism.

• Testosterone - a male hormone produced mainly in the testes. Testosterone causes the development of male sex characteristics, such as a deep voice and a beard. It also strengthens muscles and bone mass.

Do you know how you were born? Do you know how you came to be? The reproductive system is the system that made that all possible. Without the reproductive system you wouldn’t have been born. In order to produce offspring, the male and female reproductive systems have to be different. Each system has different parts, problems and care. Each system have different purposes, the male reproductive system’s function is to produce sperm, while the female reproductive system’s function is to produce ova, store ova and house a fertilized egg.