so muscle cells can be pretty expensive from an energy standpoint but it does a pretty good job because we have a lot of blood supply to muscles lots of oxygen going in there and we can get this ratcheting and shortening of the muscle but to have a muscle relax we actually have to get the calcium out of there because if it's in there it's going to keep binding to ttc and keep the muscle contraction sustained but we will actively pump it out back into the sarcoplasmic reticulum which costs even more atp so lots of energy required to get muscles to work properly so how does this relate to rigor mortis again this is amazing how fast all this happens with contraction and relaxation and relaxation of muscle tissue but when we die or when a person dies we no longer getting blood supply we're no longer creating atp but what happens is the sarcoplasmic reticulum becomes leaky kind of think of it as degrading a little bit and that calcium starts to leak out into the sarcomere what is it going to do the same thing as an active muscle contraction it'll bind to ttc and then myosin and actin will bind together but what's the problem here and what's the difference between a living muscle contraction what did we need to get that release of myosin and actin you needed atp we're not making atp when we are dead so we get that initial tension and pulling from those initial myosin and actin molecules ratcheting but we don't get that release and further binding and ratcheting the whole length of the sarcomere creating that whole shortening so there's this initial tension not enough to create full-fledged shortening of the muscle but an initial test tension in about the first three to four hours of death but then it starts to relax or loosen within about a day or NUMBER_TOKEN hours and the reason for that is the proteins myosin and actin start to degrade there's enzymes that are being released from the death of the muscle cell and just degradation of the protein because again the tissue is dying or is dead and then it will just release and then the muscle tissue will relax so rigor mortis is temporary and not nearly enough to lift the whole body up off of the table now one last thing i want to mention for all of you who love to go to the gym and work out your muscles and get bigger get huge this is what you are eating protein for or when you're taking protein supplements so you can create more sarcomeres when you stimulate your muscle tissue for growth you're going to build more myosin proteins more actin proteins more ttc in order to create more sarcomeres more sarcomeres equal more muscular force equals more strength so hopefully that gives you guys some cool ideas on muscular strength but also helps us debunk myth number two as you can see there are plenty of myths about the human body and trying to figure out what's true versus what's fake can be challenging and even frustrating at times but learning how to think critically and applying your knowledge to real world situations is one of the most important things you can do during your pursuit of scientific truth and that's why i'm such a big fan of today's sponsor brilliant brilliant is an interactive online learning platform for stem subjects that is
START_SPONSOR_TOKEN and that's why i'm such a big fan of today's sponsor brilliant brilliant is an interactive online learning platform for stem subjects that is END_SPONSOR_TOKEN