A male patient undergoing treatment with a dopamine antagonist reports experiencing reduced sexual arousal. Which of the following best explains the underlying mechanism?Group of answer choicesThe dopamine antagonist increases the release of inhibitory GABA neurotransmitters in the medial preoptic area (MPOA), leading to decreased sexual arousal.The dopamine antagonist directly lowers testosterone levels, reducing touch sensitivity in the penis and causing decreased sexual arousal.The dopamine antagonist blocks the action of dopamine released by MPOA neurons, which are primed by testosterone during sexual arousal, resulting in reduced arousal.The dopamine antagonist enhances the effect of testosterone on the MPOA, leading to excessive dopamine release and causing decreased sexual arousal through overstimulation.

People taking selective serotonin reuptake inhibitors (SSRIs) often report reduced libido. Which of the following is the most likely mechanism underlying this side effect?Group of answer choicesThe increase in extracellular serotonin levels inhibits dopamine release, which is crucial for sexual motivation and arousal.Elevated extracellular serotonin stimulates GABAergic neurons, leading to increased inhibition of sexual behaviour.The decrease in intracellular serotonin concentration reduces the production of sperm cells, affecting sexual function.Increased intracellular serotonin levels impair mitochondrial activity, causing fatigue and decreased sexual desire.

In male rats that lack androgen receptors, which of the following outcomes are likely to occur? Select all that apply.Group of answer choicesIncreased sensitivity to testosterone in the medial preoptic area (MPOA) and other brain regions.Reduced dopamine release in the MPOA during sexual arousal.Impaired development of male-specific brain structures and neural circuits.Decreased testosterone production by the testes.Feminization of external genitalia and secondary sexual characteristics

Which is an action of testosterone?Multiple choice question.It inhibits spermatogenesis but stimulates GnRH secretion.It stimulates spermatogenesis but inhibits GnRH secretion.

Match the male and female organs with their common function. Covering and protection Secrete lubricant Stimulate sexual arousal

Which of these is the major physiological effects of Testosterone?Question 3Select one:a.Stimulates the development of sexual organs and secondary sexual characteristics in males. b.Regulates mood, sexual development, and daily cycles in response to the amount of light in the environment.c.Promotes water re-absorption in kidney tubules.d.Promotes growth of all body tissues.e.Increases metabolic rate.f.Involved in T-cell developmentT-cell development