The contractile tissue of animals derived from the mesodermal layer of embryonic germ cells.
5
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1answer
52 views
Would muscle fatigue still occur if aerobic conditions for a working muscle is maintained?
Put another way if the muscle is given everything it needs to contract and do work will it ever get tired or have a reduction in energy efficiency?
As far as I understand muscles depend upon a ...
0
votes
1answer
35 views
Contracting muscles in humans
I study biology at school, and unfortunately for me, my program skips the muscles in humans chapter.
I know (and mainly, feel) that the movement in one direction isn't created by the same muscle as ...
4
votes
1answer
64 views
What is the cause of muscle cramps?
According to wikipedia, muscle cramps are caused by myosin fibers not being able to break free from the actin filaments during contraction, resulting in a prolonged contraction.
Obviously a lack of ...
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vote
0answers
32 views
Molecular cause of cramps, spasms and strengthening in muscles? (incl. intro to muscle contraction)
When motor neurons are stimulated to trigger an action potential, this potential propagates down the spine, eventually reaching a neuromuscular junction, causing the release of acetylcholine (ACh).
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2
votes
1answer
67 views
Why does yawning impair hearing?
When I yawn I can't hear anything happening around me. I also feel some kind of muscles inside my head contract and hear a faint hum, but it is not loud enough to explain not hearing other sounds. I ...
3
votes
1answer
209 views
Slow-oxidative fibres vs fast-glycotic fibres
Why do slow oxidative muscle fibres contain more mitochondria compared to fast-glycolytic muscle fibres?
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votes
0answers
49 views
What controls the feeling of discomfort/comfort before and after sleep?
I'm interested in which biological systems or hormones are involved in the following phenomenon:
Before sleep it may be difficult to find a comfortable position, and muscular aches and pains are more ...
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vote
0answers
39 views
Text/resource with information on all skeletal muscles and their motor units
Something analogous to an encyclopedia on baseball players with a list of all thier stats would be ideal.
I'm not looking for just generic muscle names, locations and illustrations.
Good answers ...
4
votes
2answers
155 views
Energy use by muscles, actual work done by muscles and more
Lately, I've started exercising in the gym and outside. I've also started to look at the details of food I eat.
Food usually has a label saying the amount of energy is inside it. For example, some ...
7
votes
1answer
107 views
Skeletal muscle without antagonist
Is there any skeletal muscle that does not have an antagonist? Excluding circular muscles such as around eye and mouth.
The reason why I am wondering is because in biology normally nothing is ever ...
8
votes
2answers
216 views
Below which temperature human muscles don't work?
When one exposes theirs body parts to cold environment (especially foot and hands), they may be numb, with temporarily blocked both muscles.
What is typical body temperature below which human muscles ...
6
votes
1answer
72 views
Is it the sphincter that flexes when a human pushes a bowel movement?
Of course the sphincter muscle is at the exit point. To use a toothpaste tube analogy, if I want to squeeze out some toothpaste, it does me little to no good to jostle the nozzle; I need to squeeze ...
7
votes
1answer
860 views
Effects of beer on muscle recovery after exercise
I noticed it several times that when I drink beer (even one bottle) after some heavy workout, the next day my muscles are more stiff than other times, and not the same way... Is it because that ...
10
votes
1answer
124 views
What is the mechanism that directs myosin walking?
Myosin, dynein and kinase all "walk" towards specific ends of the microtubule or actin filament they are on. I'm most familiar with the walking mechanism for myosin, where ATP fuels conformal changes ...
4
votes
1answer
122 views
Stabbing muscles when flexed and when relaxed
Just a random question, would a sharp object pierce your muscle more(stabbed with the same amount of force) when the muscle is flexed or when relaxed?
5
votes
2answers
561 views
Why is it that cats can jump so high for their size, compared with humans?
My cat is about 1' high at the shoulder, and I am a little over 6', but my cat can easily jump onto something as high as I am. That is 6x it's height. If a cat can do this, then Why can't I jump up ...
8
votes
1answer
423 views
Is there a correlation between muscle fibers and body types?
I have been told the number of muscle fibers a particular muscle has varies from person to person. Unfortunately, the person who told me this did not know much more than this. Initial searching on the ...
