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The video begins with the subject's genitals in a non-aroused flaccid state (0:00). As arousal progresses(0:30), the subject's penis becomes erect, the scrotum tightens and the testicles elevate. At the peak of arousal (0:57), orgasm occurs and semen is ejaculated from the penis in a series of rhythmic contractions.
Edgenuity became a popular tool for remote learning during the COVID-19 pandemic. [12] [13] [14] Due to stay-at-home orders and schools needing an alternative teaching source, Edgenuity saw a massive spike in usage, resulting in slow servers and site crashes; many schools reported problems with the site in its early stages of the pandemic. [15]
An example of normal spontaneous depolarization is the constant contractions of cardiac muscle, causing the heart to beat. Usually, intentional movement of the involved muscle causes fasciculations to cease immediately, but they may return once the muscle is at rest again. Tics must also be distinguished from fasciculations.
The excitement phase (also known as the arousal phase or initial excitement phase) is the first stage of the human sexual response cycle, which occurs as a result of physical or mental erotic stimuli, such as kissing, making out, fantasizing or viewing erotic images, that leads to sexual arousal.
In females, it contributes to clitoral erection [4] and the contractions of orgasm, and closes the vagina. Rhythmic contractions of bulbospongiosus muscles during male orgasm This muscle serves to empty the canal of the urethra , after the bladder has expelled its contents; during the greater part of the act of urination its fibers are relaxed ...
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Tonic contractions are those contractions that are maintained from several minutes up to hours at a time. These occur in the sphincters of the tract, as well as in the anterior stomach. The other type of contractions, called phasic contractions, consist of brief periods of both relaxation and contraction, occurring in the posterior stomach and ...
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