Examlex
Which of the following contains no photosynthetic organisms?
Erections
The physiological response involving the hardening and elongation of the penis, typically resulting from sexual arousal or specific stimuli, allowing for sexual intercourse.
Nocturnal Erections
Penile erections that occur during sleep, typically during rapid eye movement (REM) phases, not related to sexual stimulation.
Sleep Apnea
A sleep disorder marked by interruptions of breathing or shallow breaths during sleep, leading to poor sleep quality and other health issues.
Estrogen
A group of steroid hormones that play a significant role in the development and regulation of the female reproductive system and secondary sex characteristics.
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