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Muscular System
The muscular system allows humans to move. Muscles also provide strength, balance and heat.
11,239 Questions
A contraction in which a muscle exerts force lengthens and is overcome by a resistance?
Eccentric contraction (isotonic)
What are the two neurotransmitters that affect smooth muscle cells?
The main neurotransmitters involved with smooth muscle is Acetylcholine which causes an exited effect in smooth tissue and Adrenalin which causes an inhibitory effect. Adrenalin is produced by the adrenal gland when animals are in high stress or phsically elated situations. This causes the "flight or fight" mode in animals and increases function of regions of body necessary for survial such as skeletal muscle. Thus smooth muscle in the gut for example isn't vital in dangers situations therefore contraction of this muscle is decreased by the neurotransmitter.
What are the three hamstring muscles in the hamstring called?
biceps femoris, semitendinosus and semimembranosus
How do myosin and actin interact when contracting a muscle?
hey guys whts up.... i dont hav the answer so keep looking!
Muscles involved in chewing are the masseteres, temporalis, and medial and lateral pterygoids.
Essentially the second half of your question is what happens when a muscle contracts on a larger scale. On a much smaller scale, the contraction of muscle is caused by myosin proteins pulling themselves along the surface of an actin protein, which shortens the muscle. Muscles pull the bone that they are attached to at their point of insertion towards their point of origin.
How does muscle action result in the movement of body parts?
The arm is made up of two main muscles (biceps & triceps) for the arm to move one of these muscles must contract and the other must relax. Which muscle does which depends on which way you are moving your arm.
Additional answer
This does not mention the muscles in the forearm, which mainly move the hand, or the muscle in the shoulder, deltoid, which lifts the arm.
What would happen to the arm if the flex-or was not able to contract?
If he flexor was not able to contract the person would not be able to bend his/her arm.
When calcium is released inside a muscle cell what does it bind to?
the molecule that binds is costraynim it is a very rare molecule and is very hard to find you can find it in volcanoes and in the sea the one that is found in the sea is much different than the one in the volcanoes but they both bind to calcium during muscle contraction the one in the sea has a circulating point which can be changed if it is riied with different nature such as land the one in the volcano is very hard to take out but it is possible it has to be cooled with nitrogen straight away for more than twenty four hours before any human being can touch it with their bare hands
What is the ideal size for female biceps?
The ideal and normal size biceps for a female is around 12-14 inches. Some bodybuilders have up to 20 inch biceps. These are the true muscle women, bigger than many males.
What is the thin sheet of muscle called that separates the lungs from the intestines?
the diaphragm muscle
Where is the deltoid muscle found?
Deltoid tuberosity, a little prominence found midway on the lateral surface of the humerus. Right?
Do the lengths of the thick and thin filament change when a muscle contracts?
No. The myosin heads extend to the thin filament ( actin ) and pull themselves along with a stroke motion. They slide past one another, but they themselves lose none of their length in doing so.
How do muscles work independently?
it depends on how you use them like it you curl your arm that will be the biceps working alone but if you bench press the triceps and pectoralis muscles work together
Why do muscles ocontract and relax?
Yes, all muscles will contract and relax, Except the cardiac muscle and involuntary muscles which will be constantly working. er. Heart, intestines. But Voluntary muscles will only work together antagonistically.
How are the components of the nervous system involved in skeletal muscle movements?
The components of the nervous system involved in skeletal movements are the hemolymph A31.
Can New cardiac muscle cells replace cardiac muscle cells?
Cardiac myocytes (heart muscle cells) do not regenerate. They can get bigger (hypertrophy), but new cells are not made under normal circumstances. This means that when you have a heart attack or another injury to the heart and cardiac cells die, they are replaced by fibrous scar tissue which does not contract like normal heart tissue does.
How do muscles know when it's time to move?
Your body knows when to move because it sends electrical impulses to the brain
What are 2 muscles in your back leg?
Semitendinosus and Semimembranosus are the most caudal and deep muscles
Semitendinosus: Origin- ischiatic tuberosity; insertion medial surface of the body of the tibia and tuber calcanei (and crural fascia); innervation - sciatic nerve
Semimembranosus: Origin- ISchiatic tuberosity; Insertion- distal medial lip of the caudal rough surface of the femur, and proximal end of the tibia; innervation- sciatic nerve
The biceps femoris is the most lateral, and the adductor is the larges medial muscle
