What Can You Tell me about how the muscles work?
551706
The Muscle works by contracting, which is 'flexing' the muscle. The muscular system is operated initially by your brain and then in turn, that part of the body 'flexing'.
906039
the biology behind weight training is the key here. when you work out, you strain your muscles. this causes small tears in the muscle sheath. after about 36 hours, the muscle sheath regenerates itself, and the newly formed tissue causes the muscle to get bigger and stronger. if you work out ever 24 hours, your muscles do not have adequate time to repair themselves, and you risk injuring yourself.
1076014
The ab muscles get tired but not as quickly as others because they're constanly being used. And there aren't many muscles in your forarm so its alot harder to work them and know you're working them. odds are if you're not getting your forearms tired you're not working them correctly
992326
Every single function inside your body is based on biochemistry!\n\nYour blood, muscles, metabolism, respiratory system, and more... They all involve your body's cells and various chemicals, all working together to keep your body running, so you are able to exert yourself through physical activity.
477546
When you cough, you are using muscles, erectors are muscles that go up and down the spine so they would move and pull.
547093
Standing up involves a number of muscles because you have to lift you body from the sitting position.Muscles are in two groups each group works antagonistic to the other. \nThere are three main muscle groups of the thigh: the quadriceps; the adductors; and the hamstrings. The quadriceps muscles extend the knee joint and move the leg forwards. \n But I think it's easier to explain what happens if we consider the thigh muscles into two groups anterior muscles and posterior muslces. The anterior group the will contain the flexors of the thigh (the thigh is in a flexed position when you lift it) as well as the abductors (abduction is when the thighs are brought together). And the posterior would contain the extensors (extension is the opposite of lexion that is when you return the leg from the lifting position) as well as the adductors ( adduction is when you move the thighs apart). \nWhen sitting the posterior muscles are somehow relaxed and the anterior group of muscles are some how contracted because the hip is in a flexed position and the femoral head is medial and slightly outwards. when standing up the posterior group slightly contracts and the anterior group relaxes because the thigh is extended the femoral head is rotated slightly inwards.\nIn anatomy the muscles are said to contract when they are reduced in size and relaxed when they are increased in size that is when the innervation is intact!\nIf you are at a science lab try using the anatomy models to observe the actions you will see the movements more clearly.
542862
your  muscles contract and relax everytime you move. when you flex you are intentionally doing it.
832162
The heart is a powerful muscle slightly larger than your clenched fist. It works as a pump to send oxygen-rich blood through all parts of your body. Blood contains oxygen and nutrients that every cell in your body needs to survive. The oxygen-rich blood travels throughout the arteries and vessels, nourishing the body so that it can function properly.\n\nYour heart will beat an average of 100,000 times per day. In that time, it pumps more than 4,300 gallons of blood throughout your entire body.
537385
Basically the thing to remember is work a certain muscle group on one day and then do another. Give several days in between for those muscles to heal ( especially if you are ripping them going for bulk). \n\nIf you are doing arms for the day it doesnt matter what order you do triceps or biceps. Just remember to do several sets with a decent amount of reps. \n\nLegs same thing. Hamstrings and quads calves. Just work them for the day doesnt matter what order you do them in. Several sets with a decent amount of reps. Reps in any muscle group will depend on whether you are going for bulk or tone. \n\nNever do a full body workout when lifting weights. Always do a certain muscle group for that day with a couple days in between for them to heal. \n\nAbs can be done everyday.\n\ncardio should be done before every workout, just enough to raise your heart rate for a short time before lifting. Always stretch first.\n\nWhen you do any workout plan you will need to make sure you are getting the right diet. This takes precedence over everything. Working out depletes several minerals and vitamins, especially your electrolytes and your chromium. Its said that %90 of the american population is chromium defecient to begin with. Get extra chromium. Make sure you are eating adequate protein and getting alot of veggies. Get a damn good multi vitamin.
941883
Wow - tricky question because it goes at so many levels. I'll just keep increasing the detail and you read till you have enough.\n\nOkay - at the most obvious level:\n\nyour brain makes a decision to move (and that one is "why does the body move?") for whatever reason\n\nyour brain passes the message down through parts of the brain the relate to coordination and movement, memory etc and then the message goes down the spinal cord and winds up in the nerves to the sets of muscles. Then the muscles do it.\n\nIt's actually a little more complicated than just "bend my elbow" or "move your big toe" (Kill Bill fans - anyone?) because your brain sends the message to the biceps (in the front of your arm) to bend your elbow and also to the triceps (in the back of your arm) to pay out slack and let the elbow bend. You CAN send messages for both to contract and the elbow to stay rigid (isometric exercises).\n\nCertain parts of our brain are dedicated to coordination of these push/pull effects and allow one group of muscles to relax while the opposing group pull.\n\nThe muscles then pull on their attachment to the bones (the tendons) and then the bones move at the joints. This causes the body parts to move.\n\nOkay - let's learn about the muscle fibres and see how they actually do the movement. There's a good wiki page. Specifically, it has a good close up picture showing the actin and myosin proteins that make up the contractile elements of the muscle fibre.\n\nSLIDING FILAMENT MODEL\n\nIf you look at the close up picture, you will see that each contractile element is made up of long chains of ACTIN and MYOSIN. The Myosin being made up of a long chain of tropomyosin and a little troponin head.\n\nThis is, if you will imagine, a sort of a ratchet mechanism.\n\nIt forms a couple of sliding chains with lots of little troponin heads connecting the tropomyosin to the actin. In the picture of the sarcomere showing actin, myosin and titin you can see that the myosin is sort of double ended and pulls on two sets of actin.\n\nWhen stimulated by the nerve impulse (we'll get to that later) the myosin troponin heads waggle and "pull" the actin in and shorten the whole apparatus (the sarcomere).\n\nIn the normal resting state - the actin and the troponin heads are not actually bound together. It requires the presence of molecules of calcium to cause a change in the shape of the myosin head. This change in shape causes it to bind the actin filament and then "bend" thus pulling the actin and the myosin along each other. Remember that there are millions of the little blighters all binding at slightly different spots and all pulling along. The more of these you activate (again, controlled by the nerves) the more bind and pull you have and the stronger the contraction of your muscle.\n\nOkay - so how do you trigger it and where does the calcium come in? The calcium is stored in the muscle fibre in a spot called the "sarcoplasmic reticulum". These are arrange at each end of the sarcomere in conjunction with the transverse tubules ("T-Tubules") which penetrate the spaces between sarcomeres and allow electrical signal to flow rapidly all over the muscle fibre.\n\nThe trigger mechanism to cause the muscle to move comes from the NERVES. So let's take a look here to find out how this comes about.\n\nThe nerves which carry the signal from the brain, via the spinal cord, to the muscles all have a long process called the AXON which joins on to the muscle at a place called the Neuromuscular junction.\n\nThe axon makes and stores special chemicals called Neurotransmitters (usually Acetylcholine). When they get the signal to say "make this muscle go" they release the neurotransmitters which float across the teenie tiny space and land on the muscle fibre part (called an End Plate) and pass the signal on to the muscle.\n\nThe presence of the neurotransmitter molecules
586609
A joint is a point where it can go in a variety of ranges of motion, the perfect example being the shoulder. It rolls and makes movement much easier. Muscles on the other hand can only contract to aid movement. They work together wonderfully and any injury to one or the other can cause major disruption in function of either the joint or muscles. I hope this helps.
1105147
What is your question?  joints provide the ability to move.  What are you asking?
1090125
There are three different kinds of muscle, and each does a different kind of work:\n\nSmooth muscle, also known as involuntary muscle, is found in the digestive tract, the urinary system, the blood vessels, and the reproductive organs.  (Yes, you need it to have sex.  Treat your smooth muscle well.)  It's non-stratiated, meaning that it's not very organized compared to other muscle.\n\nCardiac muscle is also a type of involuntary muscle.  It is found only in the heart.  In structure, it is a sort of middle ground between smooth muscle and skeletal muscle.\n\nSkeletal muscle, or voluntary muscle, is anchored to bones and tendons and used for movement.  It is very well organized.
593775
http://en.wikipedia.org/wiki/Gracillis_muscle
1136467
The legs and buttocks do most of the work in cycling. The thigh is made up of two broad muscle groups. The quadriceps sit on the front of the thigh, starting at the pelvis and attaching to the knee joint. This muscle set straightens the leg. \n\nThe hamstrings are on the back of the thigh; they also start from the pelvis and attach to the knee. This muscle set bends the leg, helped out by the muscles of the buttocks (called the gluteal muscles), which also straighten the hip. \n\nThe muscles of the calf, the gastrocnemius and the soleus control the movements of the foot on the pedal, while the deep muscles of the calf act on the toes. Regular cycling improves leg strength and can often be used as a form of rehabilitation for certain leg injuries
932403
Animal muscle tissue is fascinating, when you learn how it works or "clenches". The process by which muscle clenche and release seems rather complicated to learn about.  But, it's worth it.  I believe there's a possibility for alternative energy stemming from the principles for how muscles work.  I wish all engineers had to learn about anatomy and physiology.  Here are the three easiest sites I could find. You might buy a used entry level human anatomy and physiology textbook and just start at the beginning, don't try to remember all the names of everything.  But start with cells and move up to muscle tissue early in the text. It's amazing stuff. Excellent question and sense of curiosity:\n\n\nhttp://en.wikipedia.org/wiki/Muscle_contraction\nhttp://users.rcn.com/jkimball.ma.ultranet/BiologyPages/M/Muscles.html
1028862
its a muscle, and what do you do to muscles to make them bigger