The effect of nicotine to indirectly inhibit may explain the weight gain associated with

The nicotine indirectly inhibit the CB1 or also known as the Cannabinoid receptor type 1, which is the one responsible in obesity and metabolic syndrome, thus, this would explain the weight gain associated with people who quit smoke as if this is indirectly inhibited, it produces weight gain.

Each testicle is covered by tough, fibrous layers of tissue called the tunica. The outer layer is called the tunica vaginalis and the inner layer is called the tunica albuginea. The testicle is divided into parts called lobules. Each lobule contains tiny U-shaped tubes called seminiferous tubules.

^•^ gladly correct me if I'm wrong ~•~