Galileo Galilei was a physicist, an astronomer, and a mathematician. He improved the telescope, and was the first person to use it to study the skies. He was the first to see the four moons of Jupiter and the first to discover the rings of Saturn. he invented the rings of saturn and he dicoverd the comuter.xx happy reading.e improved the telescope, and was the first person to use it to study the skies. He was the first to see the four moons of Jupiter and the first to discover the rings of Saturn. he invented the rings of saturn and he dicoverd the comuter. xx happy reading.
In male mammals, a double negative feedback loop has evolved allowing separate regulation of testosterone biosynthesis and sperm production. A dual system allows an organism to better conserve energy while still remaining optimally functional.
In negative feedback loops, when the brain receives information about a change or deviation in the body's internal conditions, it sends out signals along nerves. These signals prompt the changes in function that correct the deviation and bring the internal conditions back to the normal range [1].47 progesterone receptors participate in the estradiol positive feedback mechanism, and thus regulating the LH surge onset [12]. Ovarian factors rather than exhaustion of pituitary reserves are suggested to be important for termination of the endogenous LH surge during the normal menstrual cycle [14]. 3.