Muscle Definition and 92 Threads

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...

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...

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...

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...

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...

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.

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.

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%...

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...

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...

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.

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

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...

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...

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.

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

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...

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...?

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...

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...

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...

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...

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...

>> 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...

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...

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...

How many americans still drive thoughs old V8 tanks ??

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?

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. :-)

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?

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?

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:

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?

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

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

why does passive force increase with increased muscle length?

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?

Anyone know?

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...

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..

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...

"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."...