Marinades don't penetrate nor do acids tenderize,except for making the outer mushy. Papain, if not time controlled, will turn the meat to mush also. Sorry to be the bearer of bad news but at least you have something that will tenderize. Nothing is going to make tri tip melt literally like butter.
The diaphragm is the major muscle responsible for breathing. It is a thin, dome-shaped muscle that separates the abdominal cavity from the thoracic cavity. During inhalation, the diaphragm contracts, so that it's centre moves caudally (downward) and its edges move rostrally (upward).
Innovative new surgery repairs phrenic nerve injury, restores breathing function. The phrenic nerve controls function of the diaphragm muscle-the primary muscle involved in breathing.It tells the diaphragm when to contract, allowing the chest cavity to expand and triggering the inhalation of air into the lungs.nnovative new surgery repairs phrenic nerve injury, restores breathing function. The phrenic nerve controls function of the diaphragm muscle-the primary muscle involved in breathing.