Answer
Cortisol
Explanation:
Cortisol or stress hormone is a steroid hormone produced in the adrenal gland( Cortex) .A spike in the levels of this hormone suppresses Serotonin levels in the blood. Serotonin is a neuro- transmitter in the brain for mood regulation and balance of memory., good sleep sexual function.
A spike in the levels in the cortisol level in the blood brings a corresponding decrease in the levels of Serotonin,which therefore leads to mood swings depression and insomnia,anxiety by reducing the receptors for serotonin,and therefore disrupting Endorphins levels in the brain.
Exercises decreases the levels of cortisol in the blood,and boost the levels of serotonin therefore boosting the amount of serotonin in the blood ,thus promoting good mood, reduce depression etc
Although peer pressure can influence adolescents’ alcohol use, individual susceptibility to these pressures varies across individuals. The dopamine receptor D4 gene (DRD4<span>) is a potential candidate gene that may influence adolescents’ susceptibility to their peer environment due to the role dopamine plays in reward sensation during social interaction. We hypothesized that </span>DRD4<span> genotype status would moderate the impact of 7th-grade antisocial peer pressure on 12th-grade lifetime alcohol use (</span>n<span> = 414; 58.7 % female; 92.8 % White). The results revealed significant main effects for antisocial peer pressure, but no main effects for</span>DRD4<span> genotype on lifetime alcohol use. Adolescent </span>DRD4<span> genotype moderated the association between peer pressure and lifetime alcohol use. For individuals who carried at least one copy of the </span>DRD4<span> 7-repeat allele (7+), antisocial peer pressure was associated with increased lifetime alcohol use. These findings indicate that genetic sensitivity to peer pressure confers increased alcohol use in late adolescence.</span>
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