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A is haploid if it contains only one copy of each non-redundant gene.
In , it is necessary to distinguish between haploid nuclei and haploid cells. A may contain several haploid nuclei (either identical or from different individuals). Technically, the cell is or . However, there may be no diploid nuclei.
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Erectile dysfunction can be defined as the inability to achieve or maintain a penile erection sufficient for satisfactory sexual performance.1 In the face of an aging population, decreasing social stigma associated with erectile dysfunction and an increasing availability of effective oral therapy for its treatment, the number of patients presenting with this complaint has increased dramatically. Current estimates describe 2–3 million Canadian men as having significant recurring erectile difficulties. Recent reports identifying a dramatic increase in rates of diabetes, increased longevity and higher quality-of-life expectations by "baby boomers" are all believed to be factors in a projected continued expansion of the patient population requesting medical help with sexual issues in the near future.2,3 Although historically erectile dysfunction was a problem identified and treated by urologists, today primary care physicians and other specialists write 80% of the prescriptions for sildenafil, the most popular drug used to treat the condition.4
Testosterone and Impotence
Description: The American College of Physicians developed this guideline to present the available evidence on hormonal testing in and pharmacologic management of erectile dysfunction. Current pharmacologic therapies include phosphodiesterase-5 (PDE-5) inhibitors, such as sildenafil, vardenafil, tadalafil, mirodenafil, and udenafil, and hormonal treatment.
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Improve muscle tone and strength.
Q. Do you recommend MUSE?
From a purely physiological standpoint, the health of your heart and the functioning of your penis are intimately related.
The most significant improvements over placebo are at dosages of 4mg to 6mg. However it was clear in this same trial and others (9, 15, 16, 18), that increased dosages also increase the likelihood of the most common side effect of nausea. These side effects are reported to diminish with continued dosing. (15)
"Men who have erectile dysfunction but no known coronary disease should be evaluated for occult coronary disease and should be counseled about lifestyle," Sharlip confirmed. "The most important point is that primary-care physicians need to learn to ask whether a patient has erectile dysfunction, because it can be an early sign of heart disease."
Only 50% of patients are potential candidates
Sildenafil can cause hypotension (abnormally low blood pressure that can lead to fainting and even shock) when given to patients who are taking nitrates. Therefore, patients taking nitrates daily, even patients taking nitrates only once a day, should not take sildenafil. Nitrates are used most commonly to relieve angina (chest pain due to insufficient blood supply to the heart muscle because of narrowing of the coronary arteries); these include nitroglycerine tablets, patches, ointments, sprays, and pastes, as well as isosorbide dinitrate, and isosorbide mononitrate. Other nitrates such as amyl nitrate and butyl nitrate also are found in some recreational drugs called "poppers".
Dr. Andrew McCullough, director of male sexual health, fertility and microsurgery at NYU Langone Medical Center, said the results are promising.
Erection begins with sexual stimulation. Sexual stimulation can be tactile (for example, by touching the penis), or mental (for example, by having sexual fantasies). Sexual stimulation generates electrical impulses along the nerves going to the penis and causes the nerves to release nitric oxide, which in turn increases the production of cyclic GMP (cGMP) in the smooth muscle cells of the corpora cavernosa. The cGMP causes the smooth muscles of the corpora cavernosa to relax, and allow rapid blood flow into the penis. The in-coming blood fills the corpora cavernosa, making the penis expand.
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* Weight reduction helps to increase testosterone level and increases sexual energy and stamina. Weight reduction helps to keep hypertension and diabetes in control. Diabetes causes erectile dysfunction and anti hypertensive medications may cause erectile dysfunction.
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