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Question

What is the mechanism of penile erection?


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Solution

Penile erection:

It is the result of a complex interaction of psychological, neurological, vascular, and endocrine components, and is frequently related to sexual arousal or sexual attraction, though it can also occur spontaneously.

The penile erection mechanism is –

  1. Stimulation of sexual organs
  2. Nitric oxide is released by parasympathetic neurons, causing the tiny arterioles of the penis to dilate
  3. Blood clots in vascular spaces of penis' erectile tissues
  4. Swelling of the penis and erect posture.

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