Question

Erectile function requires an increase in ________, whereas ejaculation involves increases in ________?

1) Testosterone, Dopamine
2) Nitric oxide, Serotonin
3) Estrogen, Oxytocin
4) Progesterone, Endorphins

Answer 1

Erectile function involves the increase of nitric oxide leading to vasodilation and increased blood flow to the phallus, while ejaculation is associated with an increase in serotonin.(option 2)

Step-by-step explanation:

Erectile function requires an increase in nitric oxide, whereas ejaculation involves increases in serotonin. Thus, the correct answer is 2) Nitric oxide, Serotonin.

During sexual arousal, nitric oxide (NO) is released from nerve endings near the blood vessels within the corpora cavernosa and corpus spongiosum, which leads to vasodilation and increased blood flow into the phallus, causing an erection. The process of ejaculation is complex and involves different neurotransmitters, where an increase in serotonin is part of the physiological response.

Hence, the answer is option 2.