Transthyretin amyloidosis is a slowly progressive condition characterized by the buildup of abnormal deposits of a protein called amyloid (amyloidosis) in the body's organs and tissues.
If you play tennis, you may be familiar with the different racket customizing choices you have -- common choices include string type, gauge and tension. Not so common is an inexpensive device called a shock absorber or vibration dampener. These devices have no impact on your performance, but some players can't play without one. It's a personal choice, and if you do use a dampener, its placement must comply with the rules of the International Tennis Federation.
In a tennis match, the racket exerts the action force on the ball and, as the ball hits it, exerts an equal and opposite reaction force on the racket. The rocket launches because it pushes on the gas coming out the back end for the action force, while the gas pushes the rocket upward with a reaction force.