Spur gears. Spur gears are the most common type of gears. They have straight teeth, and are mounted on parallel shafts. Sometimes, many spur gears are used at once to create very large gear reductions.Spur gears are used in many devices that you can see all over HowStuffWorks, like the electric screwdriver, dancing monster, oscillating sprinkler, windup alarm clock, washing machine and clothes dryer.But you won't find many in your car. This is because the spur gear can be really loud.Each time a gear tooth engages a tooth on the other gear, the teeth collide, and this impact makes a noise. It also increases the stress on the gear teeth. To reduce the noise and stress in the gears, most of the gears in your car are helical.ometimes, many spur gears are used at once to create very large gear reductions. Spur gears are used in many devices that you can see all over HowStuffWorks, like the electric screwdriver, dancing monster, oscillating sprinkler, windup alarm clock, washing machine and clothes dryer.
Adrenocorticotropic hormone (ACTH) is a hormone that stimulates the production of cortisol. Cortisol is a steroid hormone important for regulating glucose, protein, and lipid metabolism, suppressing the immune system 's response, and helping to maintain blood pressure.
Adrenocorticotropic hormone (ACTH) regulates the adrenal glands. Prolactin is a hormone that is responsible for breast milk production. In the posterior pituitary, there are two major hormones: vasopressin and oxytocin. Vasopressin is essential for the regulation of the body's water balance.