| North Carolina Tar Heels |
| Year:- Week:- |
Summary for North Carolina Week 16: Jan. 8, 2013 Last updated: Jan. 10, 2013 -- 11:17 PM
ADVERTISEMENT FaceBook NewsADVERTISEMENTPollspeak Top 25 BBSport: NCAA Baseball '13
Week 12: 05/01/2013
CLICK HERE FOR DETAILS Pollspeak Top 25Sport: Men Basketball 12-13
Week 21: 04/09/2013
CLICK HERE FOR DETAILS looking for generic viagra? viagra without prescription Chest pain best drugstore where you can buy viagra canadian pharmacy viagra Cheapest viagra without prescription viagra without prescription Penile erection is managed by two different mechanisms. The first one is the reflex erection, which is achieved by directly touching the penile shaft. The second is the psychogenic erection, which is achieved by erotic stimuli. The former uses the peripheral nerves and the lower parts of the spinal cord, whereas the latter uses the limbic system of the brain. In both conditions an intact neural system is required for a successful and complete erection. Stimulation of penile shaft by the nervous system leads to the secretion of nitric oxide (NO), which causes the relaxation of smooth muscles of corpora cavernosa (the main erectile tissue of penis), and subsequently penile erection. Additionally, adequate levels of testosterone (produced by the testes) and an intact pituitary gland are required for the development of a healthy male erectile system. As can be understood from the mechanisms of a normal erection, impotence may develop due to hormonal deficiency, disorders of the neural system, lack of adequate penile blood supply or psychological problems. Restriction of blood flow can arise from impaired endothelial function due to the usual causes associated with coronary artery disease, but can also include causation by prolonged exposure to bright light or chronic exposure to high noise levels. An external vacuum pump will produce an engorged penis with success approaching 90%; a penis ring will maintain this state, although it should be removed after not more than 30 minutes. The erection is not as rigid or hard as a natural erection; drugs or injections, when they work, may be preferable. Various studies show the degree of satisfaction of users and their partners to be vary variable, even when drugs and injections do not work; in one study, about 20% of men who tried a (high-priced) pump decided to proceed to purchase one. Other studies show higher percentages of satisfied users. |