The hypothalamus releases growth hormone releasing hormone (GHRH). This then stimulates the anterior pituitary to release growth hormone (GH). The other hormones secreted by anterior pituitary are Prolactin (PRL), Follicle-Stimulating Hormone (FSH), Luteinizing Hormone (LH), Adrenocorticotropic Hormone (ACTH), and Thyroid-Stimulating Hormone TSH). Sulphur dioxide react with water to form sulphurous acid while sulphur trioxide reacts with water to form sulphuric acid. This causes acidic rain. Seminiferous tubules are functional unit of testes where spermatogenesis takes place. The prothrombin converts into the thrombin (active form) in the presence of thrombokinase and calcium ions. Guttation is the loss of water in liquid form as a dilute solution from hydathodes or water stomata.