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.
Best example of positive feedback is the release of oxytocin during childbirth. Oxytocin is a reproductive hormone in females. Though it is also secreted in males, its function is yet unclear.