where are the fast twitch muscle fiber at in the body?
90763
ummm they are your muscles, they are develped by doing fast stuff vs. doing long distancs kind of stuff.
566213
Many people have an occasional muscle twitch somewhere on their body. They can range from mildly annoying to a persistent aggravation and pain that can nearly drive one mad. Many times the twitching goes away on its own in a short time, but in other cases it can continue on for months or years.
237002
When you eat, the digestive system breaks down food & its nutrients into forms that can be absorbed by the bloodstream; blood flows to skeletal muscles as you move them (skeletal muscles are attached to bones - these are the muscles that are controlled by the voluntary movements you make - like walking, running, clicking the mouse button, etc.). The bloodstream takes oxygen & nutrients to the muscles. \nSo, the nutrients that end up going to your muscles are dependent on what foods your eating.
899754
the autonomic nervous system is under involuntary control and the somatic nervous system is under voluntary control\n\nthere would be a lot more axons in the somatic nervous system because of muscle movement
377746
vibration of the spincter muscle there, which allows, well, stuff to pass out at will and not uncontrollably! a fart is a pretty powerful thing!
311533
I believe the external stimulation would trigger a contraction.  I am basing that on the fact that the muscle fibers are stimulated directly by the electrical current\nfrom the voltage source.\n\nRecruitment of fibers occurs opposite the standard.  Type II, fast twitch fibers, are recruited first and Type I, slow twitch, are second.  Normally the pattern is Type I then Type II when needed.\n\nThe change in charge at the muscle, which is a great conductor of electricity, causes the Ca++ release normally triggered by ACh or another neurotransmitter.\n\nCouldn't find a source to back me up, try an advanced physiology textbook. I did find this link below that has similar information.
353806
T-tubules transmit nerve impulses throughout the muscle.  Think of it this way.  Your biceps muscle is composed of many different muscle cells working together.  When your brain tells your biceps to contract, does it send individual nerves to every single muscle cell?  No it doesn't (I guess that really isn't an obvious answer).  This is where the T-tubules come in.  They transmit electrical impulses from one muscle cell to another.  This way, only some muscle cells need to be activated by a nerve--the rest will be signaled through the T-tubule network, so that all of the muscle cells will contract together.\n\nSo what happens when you block the T-tubules?  Your muscle doesn't work so well anymore.  You might still get cell-to-cell communication (I'm not sure), but even if you did, it would be slow so that the muscle fibers would not contract synchronously.\n\nAddendum: It's been 6 or 7 years since I last studied physiology, so I think you should listen to the professor, not me!
146729
When any of your muscles jump, they are spasming.  There is a saying - if it spasms, feed it magnesium.  You have four major minerals in your body: calcium, potassium, sodium and magnesium that need to be in balance.  Magnesium has a function in transmitting nerve impulses - I think of it like having insulation over an electrical wire - like the one to a light bulb.  Without the insulation (or with low magnesium) your nerve impulses jump around the room (or your body) and cause spasming.\n\nTake 500mg to 1000 mg magnesium at night and see if it helps.  It should also help relax you and help you to sleep better.
337565
muscle that pumps blood
108298
It's just a twitch, muscle spasam
480892
The body doesnt use one type of fiber exclusively in anything-it has three.  Very slow, which are highly vascularized and have amazing endurance, intermediate, which are sort of a mix, and fast, which are explosive-but, to some degree all are involved in anything. For any given movement, such as grabbing a handhold and pulling yourself up, and holding yourself, the fractions of the different fibres being used would change from second to second.  But, the thing is, which fibres can be trained more?  For slow fibres, an excellent overall cardiovascular fitness regimen is sufficient-you dont need to do anything specifically for the arm and shoulder muscles for slow fibres.  The best weightlifting regimen for this kind of sport is explosive speed/strength training, in which you use 30-50% of the maximum weight you can lift (for any given movement), and accelerate it quickly through as large a range of motion as you can-  It takes some months to build up to a really fast acceleration, because this training has a potential to cause muscle tears and joint damage (just like strength training of any kind).  Stretching is also very good for speed/strength, but *never* stretch to the point of pain-it significantly weakens the muscle for hours afterwards.
384455
Skeletal muscles are voluntary muscles attached to your bones like your biceps, etc. Smooth muscle is involuntary muscle such as that in the heart or stomach.
100814
myotonin protein kinase: gene product of myotonic dystrophy is localized in the sarcoplasmic reticulum of skeletal muscle. Also, may be located at the intercalated discs and have a different isoform in cardiac tissue.\n\nIt is quite important to know the exact localization and function of myotonin protein kinase (MtPK), identified as the gene product of myotonic dystrophy, the most prevalent disease with multisystem disorders among muscular dystrophies. To investigate the localization of MtPK, we raised a polyclonal antibody against a synthetic peptide chosen within the deduced sequence of MtPK. This antibody detected both a membrane-bound 70-kd protein and a soluble 55-kd protein on Western blots of human muscles. By using this antibody for immunohistochemical studies of both biopsied human skeletal muscle fibers and mature innervated cultured muscle fibers, we can now demonstrate by confocal laser scanning microscopy that MtPK is localized mainly in the I-band. By immunoelectron microscopy, it was determined that MtPK is a membrane-bound protein localized mainly in the terminal cisternae of the sarcoplasmic reticulum. To our knowledge, this is the first documentation of the ultrastructural localization of MtPK. This finding is quite important for clarifying the pathophysiological basis of myotonic dystrophy, which might be due to a dysregulation of calcium metabolism.
474768
(m)\n\nHave you ever wondered what makes the muscles around your eyes twitch and flutter from time to time? The answer to this question is relatively simple. And so is the remedy. \n\nAll of the six hundred plus muscles that exist throughout your body and head are supplied by nerves that originate in your brain. If you take it from the top, your brain induces a signal that travels down through your brain stem and spinal cord and out through peripheral nerves to reach each of your muscles. The flow of electricity through this pathway is what allows you to have motor control over your muscles.\n\nYour brain and spinal cord are much like the water tower in your city. Both are full of energy and just itching to gush electricity and water out through peripheral nerves and city water pipes, respectively. In the case of your municipal water supply, you are able to regulate how much water comes out of the pipes in your home with your faucets. In the case of your body, your peripheral nerves are your faucets and must regulate how much electron flow is allowed to come out of your spinal cord and travel to your muscles. \n\nGetting back to what causes a twitching eye, the twitching muscle in question is called your orbicularis oculi muscle. This muscle has two parts: a palpebral part that allows you to open and close your eyelids, and an orbital part that allows you to have a wide range of expressive looks with your eyes, a good example being when your eyes open really wide with surprise.\n\nThe peripheral nerve that acts as a faucet for your orbicularis oculi muscle is called the temporal branch of your facial nerve. So, for you to open and close your eyelids or open your eyes as wide as possible, the temporal branch of your facial nerve must allow just enough electricity to come out from your brain and brain stem and travel to your orbicularis oculi muscle. \n\nIn the vast majority of cases of a twitching or fluttering eye, the problem is with the temporal branch of the facial nerve. When this nerve becomes fatigued, it acts like a worn down water faucet - the flow of electrons is no longer smooth and even. The result is that your orbicularis oculi muscle will twitch or flutter as it receives jolts of uncontrolled information from your brain and brain stem. \n\nIn case you missed it, I just gave you the answer to the most common cause of a twitching eye: fatigue. And fatigue goes hand in hand with stress. \n\nWhen the muscles that surround your eyes twitch and flutter, chances are very good that you are fatigued and stressed. So the remedy for a twitching eye is rest and relaxation.\n\nNot muscle relaxants, not pain killers, not chiropractic adjustments.
788014
You can tell the difference in skeletal (voluntary) muscle and cardiac muscle under the microscope.  Skeletal muscle has it's nuclei pushed out to the side of each myocyte, whereas cardial muscle has the nucleus in the center.  Both have striated cytoplasm.
475089
cardiac muscle or myocardium
713075
Look up the Sartorius muscle.