The iPhone 6s and 6s Plus are made from a 7000 Series aluminum alloy, which is stronger and more durable than the 6000 series used in the previous-generation iPhones. Apple's also updated the devices with stronger glass, made using a dual ion exchange process.
Sacral Nerves. The brain tells the bladder and bowel what to do by sending electrical signals to the muscles in the pelvic floor, the sphincters, the urethra as well as the bladder and rectal area. The messages or impulses sent by the brain to the pelvic area are carried by a system of special fibres called nerves.
CCK stimulating vagus nerve. CCK stimulate vagus nerve to send signals to hypothalamus-cells in hypothalamus release a neurotransmitter that is the shorter version of CCK --CCK in intestines cannot cross the blood-brain barrier-but it can stimulate cells in hypothalamus to release cells almost like itself. î î î.