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Muscular System
The muscular system allows humans to move. Muscles also provide strength, balance and heat.
11,239 Questions
Is there carbon in our muscles?
It diffuses into capillaries in the muscle where red blood cells and the blood carry it to the lungs were it is released and oxygen takes its place in the blood.
What can you do to increase the amount of time before your muscles fatigue?
The only way to increase the amount of time before your muscles fatigue is to slowly increase the amount of time you workout. You should also increase your fluid intake during your exercise routine.
How do the fexor and extensor work together?
Flexor and extensor muscles basically do opposite jobs: flexors contract to "close" a joint whereas extensors lengthen to "open" a joint.
Sets of flexors and extensors are attached to the same joints, which means that there is a relationship between how they work. In smooth, efficient movement activity in the flexors will also cause inhibition in the extensors (and vice versa). If this weren't the case, the muscles would be working against each other which would not provide efficient movement, and can actually cause damage to the body.
Due to faulty movement learning, many people unfortunately have less than perfect cooperation between their flexors and extensors, and it is a common cause of chronic pain and inflammation.
What are three processes that muscles make happen without your voluntary control?
breathing, heart beat, and digestive system are all involuntary muscle actions.
What initiates the depolarization of the membrane in muscle contraction?
Muscles contract when they receive nerve signals from the brain, telling them to put filaments in action. The thin ones slide past the thick, shortening the sarcomere (this is a special part of the muscle).
What is the muscle to the right of the linea Alba?
The rectus abdominus muscles are on either side of the linea alba.
What happens when you tense a muscle?
The reason the contract and relax is because they move you arms up and down. When you straighten your arm, the bicept relaxes and the tricept contracts. When you pull your arm up ( flex ) the bicept contracts and the triceps relaxes.
By the way, I'm 11!
Why do skeletal muscles fatigue more quickly than smooth muscles?
The refractory period is much greater in case of cardiac muscle. It contracts slowly and rhythmically.
but skeletal muscles experience fatigue easily since the expenditure of energy is very high; and as refractory period is very less it does not get time for the removal of the accumulated lactic acid due to anoxygenic respiration.
What cord of collagen fibers attaches muscle to bone?
At each end of the muscle the collagen fibers of the epimysium, perimysium and endomysium come together to form a bundle known as a tendon. If they form a broad sheet it is called an aponeurosis.
I think tendon is what you're looking for.
Two basic tissue types are excitable?
excitable tissue is the tissue that can undergo rapid change in their membrane potential which is important to transport electrical signals. by this they can respond to stimuli. example of excitable tissue is nerves and muscle tissue ( skeletal,cardiac and smooth ) - by einstein jr
What muscle do you use for speed?
Speed while running is caused by the elasticity in your muscles. The more elasticity you have, the faster your legs go back to their original position, and the faster you can move them again.
What muscle flexes the elbow and supinates the forearm?
to flex the forearm at the elbow, you use the biceps brachii, brachialis, and brachioradial (to a lesser extent).
to supinate the forearm, you use the biceps brachii and the supinator muscles.
the biceps brachii does both motions.
Innervation affects on strength of muscle contractions?
Alterations in the nervous system firing pattern can occur as a result of training. Motor unit recruitment and the firing pattern to muscle can change with training also. The improvement in the firing pattern of nerves explains the initial improvement that occurs from strength training. Light exercise stimulates the recruitment of slow-twitch fibres whereas larger forces involved in things such as weight training recruit fast-twitch fibres. Please let me know if this helps- because that's what I wrote for my assignment!
Why does your brain tell you what to move in your body and how to move it?
The brain is structured in the sections that separate taste from touch, and sight from hearing etc. Your brain has neurons when you tell your brain something, it sends signals to the neurons which convert those signals electrically and chemically to be sent off to the muscles to perform the action.
Muscle contrast much more slowly than the other two muscle types. Peristalsis, a wave like motion that keeps food moving through the small intestine, is typical of its activity.
Simply put- You have no control over smooth muscle activity.
What muscles are used to bend over pick up a basket?
Bending over to pick upa basket will use your calves, bisepts, core, and lower back.
Which system is responsible for carrying oxygen to muscles?
The circulatory system (blood) moves oxygen through the body to the cells.
The tendinous cords are located in the ventricles. The function of the tendinous cords that are attached to the bicuspid and tricuspid valves is to connect the atrio-ventricular valves to the papillary muscles.
How do muscles bones and tendons work together?
Muscles, bones and tendons work together to move your arm. The tendons will connect the muscles to the bones and the bones will provide the necessary support which will facilitate the movement.
