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Muscular System
The muscular system allows humans to move. Muscles also provide strength, balance and heat.
11,239 Questions
What happens to the strength of contraction during wave summation?
It increases about to about four times greater than a normal contraction for skeletal muscle.
What is it called when a body goes still after death?
Rigor mortis.
A few hours after a person or animal dies, the joints of the body stiffen and become locked in place. This stiffening is called rigor mortis. Depending on temperature and other conditions, rigor mortis lasts approximately 72 hours. The phenomenon is caused by the skeletal muscles partially contracting. The muscles are unable to relax, so the joints become fixed in place.
More specifically, what happens is that the membranes of muscle cells become more permeable to calcium ions. Living muscle cells expend energy to transport calcium ions to the outside of the cells. The calcium ions that flow into the muscle cells promote the cross-bridge attachment between actin and myosin, two types of fibers that work together in muscle contraction. The muscle fibers ratchet shorter and shorter until they are fully contracted or as long as the neurotransmitter acetylcholine and the energy molecule adenosine triphosphate (ATP) are present. However, muscles need ATP in order to release from a contracted state (it is used to pump the calcium out of the cells so the fibers can unlatch from each other). ATP reserves are quickly exhausted from the muscle contraction and other cellular processes. This means that the actin and myosin fibers will remain linked until the muscles themselves start to decompose.
Rigor mortis can be used to help estimate time of death. The onset of rigor mortis may range from 10 minutes to several hours, depending on factors including temperature (rapid cooling of a body can inhibit rigor mortis, but it occurs upon thawing). Maximum stiffness is reached around 12-24 hours post mortem. Facial muscles are affected first, with the rigor then spreading to other parts of the body. The joints are stiff for 1-3 days, but after this time general tissue decay and leaking of lysosomal intracellular digestive enzymes will cause the muscles to relax. It is interesting to note that meat is generally considered to be more tender if it is eaten after rigor mortis has passed.
What is this you have 32 muscles in each ear?
No, its cats who have 32 muscles in each ear, not humans.
pigs do indeed have a muscle called the biceps brachii. It is one headed though unlike in humans where there are 2 heads.
; Sternocleidomastoid muscle - this branchiomeric muscle flexes the head (prayer muscles) when both left and right members contract. The neck twists or rotates when only one contracts. Its antagonist is the splenius capitis, a somatic muscle (which extends the head). Both these muscles act as 1st class levers.
Parallel
What is a chronic progressive neuromuscular disorder that causes severe skeletal muscle weakness?
myasthenia gravis
Which of these terms refers to loss of muscle and strength and decreased quality of muscle tissue?
sarcopenia A+
The company which produces seroquel DOES NOT produce any as low as 12.5 mg. To get that low you would need to cut the smallest dose in quarters. You probably mean another drug. From original poster........ No....I don't mean another drug. I did cut the 25mg Seroquel in half per Dr's instructions.
A muscle that causes a desired action?
Nerve impulses that originate in the central nervous system cause muscles to contract. Muscle fiber generates tension during the action of actin and myosin cross-bridge cycling. While under tension, the muscle may lengthen, shorten, or remain the same.
What parts make up muscular system?
Bones. The skeleton is the hard tissue that supports the body's structure. Humans have about 206 bones, from the femur (the largest and strongest) to the inner ear bones (incus, malleus and stapes, the smallest). They protect the internal organs ( heart lungs, liver etc. ) and give a base for muscle attachment.
It is made of bones!
How do muscles and skeleton combine together to facilitate locomotion?
The way the muscles are attached to the bones is what facilitates locomotion. The muscles contract which makes the bones move and creates locomotion.
Muscles or glands that bring about a coordinated response?
Effectors is the term used for glands or muscles that result in a coordinated response. Receptors are what receive stimuli from the outside environment.
Can inactivity cause muscle loss or weakness?
Quite obviously yes. If you don't use it you lose it simple as that.
NASA does experiments with people lying in bed for up to 3 months at a time, as a way to simulate the effect of weightlessness on astronauts. They say that the effects of 3 months in bed "aren't pretty", and the participants end up with muscle and even bone density loss.
See related link.
Which nerves move the eyeball?
Nerves cannot move organs. Muscles move organs and nerves tell the muscles to move. The muscles that move the eye are the Superior Oblique, Inferior Oblique, Superior Rectus, Inferior Rectus, Medial Rectus, and Lateral Rectus.
What does a tattoo on the inside of bicep mean?
It means "Here is a place where I'd like to put a tattoo"
Can you have nausea with nerves?
Defiantly. If something hurts your nerves or any part of you, it can make you nauseas.
