Muscle Definition and 97 Threads

  1. Q

    Fascicle Arrangement & Muscle Structure: Videos & Info

    How is fascicle arrangement linked to muscle structure? Does anyone know where I can get videos on fascicles? Thanks
  2. Evo

    Medical Could my neck injury be covered by workman's compensation?

    I've been suffering with this for a week and finally went to the doctor yesterday (can't move my neck or raise my right arm above my head). He prescribed Zanaflex in capsule form, which I see everywhere that it's not the same as the generic or pill form, but doesn't say exactly why. The...
  3. S

    Agonist/Antagonist muscle pairs (quick question)

    agonist/antagonist muscle pairs. Let's say agonist flexes the finger. When agonist get paralyzed why does the finger stay in an extended position? Ok I know this is obvious it is acting unopposed but my question is for the finger to stay in an extended position does the paralyzed person have...
  4. M

    Is Muscle Memory tied to Mirror Neurons?

    Just wondering: I know that your mirror-neurons strengthen connections simply by watching someone perform an action. My question is, is muscle memory tied to mirror neurons? Or is this not yet known? Can you gain muscle memory simply by thinking about a certain motion, rather than...
  5. Spinnor

    Medical Does heart muscle get tired like say leg muscle?

    Does heart muscle get "tired" like say leg muscle? I'm a 52 year old male and have been bicycling for pleasure and exercise for many years. I have noticed a pattern that would like some comment on. I have noticed that if on a hour to two hour ride that if I push too hard for too long that short...
  6. Spinnor

    Plants that make muscle amino-acids?

    Could plants be bio-engineered so that a large fraction of their seed mass was in the form of muscle amino-acids? Do soybeans have a large fraction of their mass in the form of amino-acids that make up muscle protein? I would like such a plant so I could stop eating animal meat and reduce my...
  7. L

    Supplements and muscle building

    ive done a search on google and found a lot of things about supplements and muscle building etc. im wondering what factors affect the amount of testosterone in your body? ive read working large groups of muscles increases it, and also exposure to sunlight (apparently) can anyone...
  8. M

    Calculating Torque by Muscle: Bicep Flexor Force & Upper Arm Bone Force

    A man holds a 196 N ball in his hand with the forearm horizontal as shown on the drawing to the left. He can support the ball in this position because of force, Fb from his bicep flexor muscule which is applied perpendicular to the forearm. This force applies a torque about the elbow joint...
  9. T

    Medical 8 letter word for a efficient grouping of cardiac muscle cells

    Doing a homework crossword and this is the last problem. I can't seem to find it anywhere. An efficient grouping of cardiac muscle cells, eight letters long ending in M. Any help would be much appreciated.
  10. C

    Medical Anyone care to explain muscle development?

    In an attempt to grow stronger (i'm quite feeble to be honest) I've decided to start doing dumbbell excercises. However, I'm quite curious - what actually causes muscle development? As in the process, what occurs in the body for it to occur, etc. Thanks in advance.
  11. B

    Medical What determines the amount of force a human muscle can exert?

    For any given human muscle (the bicep for example), are there any other factors that determine the amount of force it can exert besides the amount of muscle and the "type" (red vs white, or slow-twitch vs fast-twitch)? Say, if you had a person who had .5 kg of muscle in his bicept that was 60%...
  12. B

    Static Equilibrium of deltoid muscle

    Homework Statement Calculate the magnitude of the force, FM, required of the "deltoid" muscle to hold up the outstretched arm shown in the figure. The total mass of the arm is 3.3 kg. Then, calculate the magnitude of the force FJ exerted by the shoulder joint on the upper arm...
  13. W

    Fast And Slow Muscle Fiber Conundrum

    Question 1, WHICH SET WILL PRODUCE MORE, AND MORE OVERALL FORCE FROM THE SLOW MUSCLE FIBERS, THUS IN TURN MORE TENSION TO THEM. A slow set of slow reps 3/3, using 75% of your 1RM, let us call this 100pounds, 6 repetitions = 36 seconds. You fail faster in the faster rep with the same...
  14. S

    Muscle Fiber Contraction and Calcium

    When glycerinated rabbit muscle fiber was placed in 10^-4 M of CaCl2 solution, the percent change in length of the muscle fiber was around 93%. When glycerinated rabbit muscle fiber was placed in 30 mM ATP in 10^-2 M CaCl2 + 0.05 M KCl + 0.001 M MgCl2 solution, the percent change in length of...
  15. M

    Pushing more weight than you, does muscle matter?

    No need to make this question any more difficult than it needs to be. Simple, right? Please view the attachment, as it is the question.
  16. B

    Connections Between Skeletal Muscle Cells & AP Transmission

    I know that smooth and cardiac muscle cells (myofibers) are connected to each other by gap junctions. How are skeletal muscle cells connected to each other (to transmit the AP)? Thanks, any responses appreciated
  17. E

    Playing Piano: Tips for Improving Pinky Muscle Strength

    Does anyone here play piano? I recently learned Fur Elise but the more I play it the more my pinky muscle gets sore and usually I just have to quit in the middle of the song from these weird pinky muscle spasms. Does anyone know how I can make my pinky muscle stronger? Will it eventually be...
  18. L

    Can HIV attach itself to a muscle cell or a skin cell?

    1. Can HIV attach itself to a muscle cell or a skin cell? It seems that HIV attacks the immune system mainly by damaging the CD4 (also known as T4 or T-helper) cells which help the body fight off diseases. But I don't think that is the correct answer to this question. Theoretically...
  19. S

    What causes muscle knots and how can they be treated naturally?

    I know that the muscle doesn't actually knot, so what is that hard lump in your muscle that you can feel when you press on it? And how to heal it naturally?(instead of massaging) I know warming up/cooling down/stretching helps but sometimes, it just isn't enough.
  20. Loren Booda

    Exploring Human Muscle Movement: The Fastest Large-Scale Movements

    What is the fastest movement that larger scale human muscles (vs. cells) can make?
  21. moe darklight

    2 questions about muscle growth from a boilogical/evolutionary pov

    hey, I've always wondered this and couldn't find an answer for it: 1) suppose you're a person who works out, and then you stop. how long does it take for your muscles to go "back to normal." and does this deterioration begin as soon as muscle repair after the workout has stopped (24-36 hours...
  22. R

    Compare Water Content of Muscle, Liver, Fat, Heart, Cartilage, Bone Marrow

    How would you rate the following in terms of water content: muscle, liver, fat, heart, cartilage, bone marrow and where could i find a table of comparison...?
  23. R

    Does muscle have the least protein content?

    I am in the middle of a physics experiment that has recently crossed over into biology...the details are not important, but what i found was that a certain property changed in this order as the following substances were scanned: 1. muscle 2. liver 3. fat 4. heart 5. cartilage 6. bone...
  24. M

    Find Force M Exerted by Muscle in Test Apparatus

    A person exerts a horizontal force |F| = 192 N in the test apparatus shown in the drawing. Find the horizontal force M (magnitude and direction) that is flexor muscle exerts on his forearm. (L = 0.31 m, h = 0.047 m) http://img238.imageshack.us/img238/1465/c9p17iy6.jpg I know that the...
  25. P

    Gaining Muscle Mass: Tips and Advice for a Thin Guy

    i'm a pretty thin guy. 6'1 and 155 pounds. i went to the gym a fair bit during the summer, got stronger, I'm as strong as guys who look much more muscular. what can I do to gain a bit more muscle mass? people at my work told me that i have to put on a lot a fat and then turn that into muscle...
  26. Astronuc

    Medical Cherry Juice May Cut Muscle Pain

    Students Who Drank the Juice Showed Less Pain and Loss of Strength After Exercise By Miranda Hitti WebMD Medical News Well chocolate, or rather certain ingredients in chocolate, is supposed to help one's muscles to recover from exercise, particuarly from weight-training and muscle...
  27. D

    Artificial Muscle Finds Use In Robots

    Technology Review recently produced a video documentary on work being done with artificial muscles and its potential application to robotics and possibly toys as well. It is an interesting video with scientific background information into how the artificial muscle is actually made, and how it...
  28. K

    How Many ATP Molecules Are Used in a Single Bicep Muscle Contraction?

    >> Calculate approximately how many molecules of ATP are required for a standard muscle like the biceps during the contraction phase of a single twitch. I honestly do not even know where to begin here... I don't think he wants us to go through and just outline Glycolysis/Kreb's Cycle/ETC...
  29. V

    Report on subject: synapse and muscle

    I have to make a report on subject: synapse and muscle. Well i know what synapse is, but how are muscle and synapse related. Does this topic mean that i have to explain how muscles work in terms of neurons exhanging impulses through synapses. I am not really expert on the subject but any hints...
  30. P

    Vascularization muscle tissue and fat tissue

    Hey Moonbear and other Physio types, Do equal volumes of muscle tissue and fat tissue have equal vascularization? how about equal masses of the two? If one body type (muscular) requires more vascularization than another (fat), that means greater blood volume, correct or incorrect? Does...
  31. wolram

    Classic American Muscle: Counting the V8 Tanks On the Road

    How many americans still drive thoughs old V8 tanks ??
  32. J

    Thinking About Working Out: Can It Increase Muscle Mass?

    I *think* I remember hearing something about a study that showed just thinking about working out was able to increase muscle mass.. was this true?
  33. C

    Muscle Contraction: Why T-Tubules Needed

    Why do muscle fibres need T-tubules for the action potential to go down to stimulate the sarcoplasmic reticulum to release calcium ions? Why couldn't it just travel along the sarcomere? Thanks. :-)
  34. F

    If I don't eat anything, I'll lose muscle and then fat, correct?

    If I don't eat anything, I'll lose muscle and then fat, correct? But eventually I will lose muscle and then fat? If I want to lose weight- eg lots of muscle/fat-, then I can starve myself to achieve this goal, right?
  35. C

    Building Muscle: Tips for Runners on Diet and Exercise

    Hey guys, I was wondering what is the best way to build muscle if I run the track. Is it wise to eat a lot of fat, then run my buttocks off for the muscle? Or eat light and low carbs and low calories? What becomes muscles then?
  36. M

    Muscle Relaxants: How They Work & Types Explained

    How do muscle relaxants work and who discovered how they work? Why are there so many different kinds of muscle relaxants? Are there any that are natural? :rolleyes:
  37. E

    Can Fat Be Directly Converted to Muscle?

    just wondering... people usually say one can convert fat to muscle. is this a direct mechanism of just converting or does one burn off the fat first then build the muscle?
  38. M

    What are muscle spasms and how do you make them go away?

    What are muscle spasms and how do you make them go away?
  39. tandoorichicken

    Diameter of Human Muscle Fiber - Bicep

    On average, what is the diameter of a human muscle fiber (say, a bicep muscle)?
  40. J

    Why does passive force increase with increased muscle length?

    why does passive force increase with increased muscle length?
  41. J

    Can You Control Voluntary Muscle Movements?

    Why is it that some people can move muscles and others can't? Like why can't i flare my nostrals? is it weird my friend can voluntary contract and relax his scrotum up and down? please post any strange voluntary muscle movments you can do. Why can somepeople do it and not others?
  42. E

    Unexpected Muscle Cramp in Right Buttock: Causes and Solutions

    My right buttocks cramped up today. That has *never* happened before. It was quite unexpected... I was sitting down, and when I stood up, the cramp really hit me. Im confused. Why on Earth would that happen?
  43. F

    Regenerative chemical turns muscle cells into stem cells

    found an interesting article on new stem cell research: "La Jolla, CA. December 22, 2003—A group of researchers from The Scripps Research Institute has identified a small synthetic molecule that can induce a cell to undergo dedifferentiation—to move backwards developmentally from its current...
  44. Monique

    Flu and Muscle Aches: Where Do They Come From?

    I have been under the weather for the past few days with a flue :frown: I am wondering, where do the muscle aches come from? :frown: I was supposed to have a fun-night out in Amsterdam yesterday (Kill Bill just came out).. but nothing of that..
  45. Monique

    Dramatic muscle mass increase due to mutation

    Belgian farmers had been breeding a bull for its muscle size, finally getting a bull who is supermuscular http://www.ultimate-exercise.com/bravenewworld.html This supermuscularity is caused by a mutation is the myostatin gene. Why has this case not been exploited yet? Or am I just not...
  46. Ivan Seeking

    Perseid Preview: Moon to Muscle in on Aug. 12-13 Meteor Shower

    "But a major obstacle, the Moon, will work against attempts to spot the fiery space dust this year. The Moon will turn full on Aug. 12, severely hampering observations just at the wrong time. Bright moonlight will flood the sky all through that entire night."...
Back
Top