how do actions of skeletal muscle affect maintenance of body temperature?
493844
the movement of skeletal muscles produces heat...when you are cold, shivering is your muscles 'shaking' which produces heat to keep you warmer..if you are producing a lot of heat (for ex.-during exercise) your body sweats to try and keep you cooler.
368078
These are all good answers. The one thing that I find useful when thinking about this is that body temperature is tightly controlled around specific target temperatures, or set points, like a thermostat controls room temperature. Fever is an adjustment upward of the set point. The control is still there, the target temperature has just been elevated. In some instances, the set point can be raised too high, or control seems to be lost, but generally the body manages the response well.
412899
i done MSc immunology and the answer to this question was not clear. few theories for u to look at. 1. bacteria enjoy a specific temperature usually 37C. maybe they wont thrive in high temperatures? not a lot to support this theory. we know bacteria do very well in hot bodies! 2.its a physiological response to antibody production. the hypothalamus detects rice in bacterial invasion, switches on antibody production and heats up the system to speed it along 3. evolutionary mechanism for ensuring others are aware of illness so that they dont get infected too. 4. to ensure the person feels damn ill so the body can rest conserving energy so immune response can work better take your pick!
527660
our bodies constantly generate a lot of heat because of our metabolism. So we have to constantly lose heat to maintain our normal temperature. \n\nIf you put a bucket of warm water outside, and that warm water just happened to be 98.6 degrees Fahrenheit, but the outdoor temperature was 85 degrees Fahrenheit, the water would cool down. That's because the outdoor temperature, while still warm, is cooler than the temperature of the water. Heat naturally flows from warmer places to cooler places. The heat's "goal" is to reach equilibrium–a state where everything is the same temperature as everything that surrounds it. That's why a hot bowl of soup or a cold glass of soda will eventually reach room temperature if you leave them out long enough.\n\nThe difference between you and a bucket of water (well, one of many differences) is that your body is constantly generating more heat. All that heat has to go somewhere, so it tries to escape through your skin. The greater the difference between the outside temperature and the temperature of your body, the faster that heat will escape. That's why you'll feel much cooler on a 60-degree day than on a 90-degree day.
894377
When muscles contract they use energy that is derived from food. It is a two-step process. The first step occurs in mitochondria, where the energy from molecules like glucose or fats is locked away in ATP (adenosine triphosphate). This ATP travels from the mitochondria to sites in the muscle where energy is needed, and the energy is released and used. At both of these stages there is the possibility for energy to be lost mainly as heat, causing a big reduction in efficiency. The proportion of food energy that ends up making the muscles move varies considerably between people from 15 to 30%.
763927
since its for your project i'll try to be as brief as possible and provide as much info.\n\nDifferent parts of the body are at different temperatures. the skin temperature is lower than the liver temperature and the feet and hands may be colder than the abdomen. however 'body-temperature' usually means the temperature deep inside the body. the temperature varies during the day and there is no 'correct' body temperature. variations in the range of 35.8-37.7*C are normal.\n\nInternal heat:\nMany of the chemical reactions in cells release heat. the chief heat organs are the abdominal organs, the brain and contracting muscles.\n\nExternal:\nDirect heat from the sun absorbed by the skin, hot drinks and food also add heat to body.\nEvaporation from the skin and lungs takes place all the time and is a cause of heat loss. to a large extent, the heat lost from the body is balanced by the heat absorbed or produced.\n\ni hope this much is enough for you.
963835
the body is not very good at changing energy into movement\n3/4 of the energy used to move muscles is turned into heat instead of moving the muscle\nthis heat is what makes you warm
728515
the circulatory system (ie the blood circulatory system) can maintain the temperature of the body by vaso-dilation and vaso constriction of the blood vessels ( both deepseated and superficial) when there is cold or the weather is hot respectively.
941373
Within limits,as temperature increases,so does the amount of O2 released from the hemoglobin.Heat is a byproduct of the metabolic reations of all cells and the heat released by contracting muscle fibers tends to raise body temperature.Metabolically active cells require more O2 and liberate more acids and heat.The acids and heat, in turn, promote release of O2 from oxyhemoglobin(oxy binded with hemoglobin in blood).\n\nSo, increased in temperature caused the rate of respiration to increase too.Because O2 tends to be released from the hemoglobin compared to when the weather is cold.This explain why during fever,a person will breath faster than normal person.\nIn contrast,during hypothermia(lowered body temperature) cellular metabolism slows and the need for O2 is reduced,and more O2 remains bound to hemoglobin.\n\nPlease check my grammar too.Im sux with my grammar coz English is my 3rd language.So, please check it.Hope this helps ya!
437677
the burning of sugar in your body to produce movement creates heat.  that's why you heat up faster when you exercise.
11277
Your muscles contract to better insulate your natural body heat and there for put a greater strain on your bladder.
855946
1)  By producing heat, organisms can stay active throughout the cold winter months, thereby allowing them to breed and claim new habitats.  They can also feed on the slower, cold-blooded creatures!\n\n2)  Warm-blooded animals can stay more active during night time hours - an advantage for many of the same reasons in (1).\n\n3)  Warm-blooded animals can change their metabolisms much faster than can cold-blooded animals.  This allows them to adapt to environments and to increase their range.  Cold-blooded animals are much slower to adapt to changing environmental conditions.\n\n4)  Exothermic reactions within the body allow for greater metabolic efficiency.  Therefore, warm-blooded animals get greater benefit from the food that they eat, or conversely, do not need to eat as often to get their nutrional requirements.  This gives them an evolutionary advantage in terms of what they can eat and the ability to thrive during famine.
1099408
It is about negative feedback which involves:\n\n* Sense that temp has deviated from the homeostatic set point\n* That message is sent to the integrating system in the brain\n* Then an action potential is sent to the effector target to stimulate    muscles contraction to get the temp back up to the set point
941883
Wow - tricky question because it goes at so many levels. I'll just keep increasing the detail and you read till you have enough.\n\nOkay - at the most obvious level:\n\nyour brain makes a decision to move (and that one is "why does the body move?") for whatever reason\n\nyour brain passes the message down through parts of the brain the relate to coordination and movement, memory etc and then the message goes down the spinal cord and winds up in the nerves to the sets of muscles. Then the muscles do it.\n\nIt's actually a little more complicated than just "bend my elbow" or "move your big toe" (Kill Bill fans - anyone?) because your brain sends the message to the biceps (in the front of your arm) to bend your elbow and also to the triceps (in the back of your arm) to pay out slack and let the elbow bend. You CAN send messages for both to contract and the elbow to stay rigid (isometric exercises).\n\nCertain parts of our brain are dedicated to coordination of these push/pull effects and allow one group of muscles to relax while the opposing group pull.\n\nThe muscles then pull on their attachment to the bones (the tendons) and then the bones move at the joints. This causes the body parts to move.\n\nOkay - let's learn about the muscle fibres and see how they actually do the movement. There's a good wiki page. Specifically, it has a good close up picture showing the actin and myosin proteins that make up the contractile elements of the muscle fibre.\n\nSLIDING FILAMENT MODEL\n\nIf you look at the close up picture, you will see that each contractile element is made up of long chains of ACTIN and MYOSIN. The Myosin being made up of a long chain of tropomyosin and a little troponin head.\n\nThis is, if you will imagine, a sort of a ratchet mechanism.\n\nIt forms a couple of sliding chains with lots of little troponin heads connecting the tropomyosin to the actin. In the picture of the sarcomere showing actin, myosin and titin you can see that the myosin is sort of double ended and pulls on two sets of actin.\n\nWhen stimulated by the nerve impulse (we'll get to that later) the myosin troponin heads waggle and "pull" the actin in and shorten the whole apparatus (the sarcomere).\n\nIn the normal resting state - the actin and the troponin heads are not actually bound together. It requires the presence of molecules of calcium to cause a change in the shape of the myosin head. This change in shape causes it to bind the actin filament and then "bend" thus pulling the actin and the myosin along each other. Remember that there are millions of the little blighters all binding at slightly different spots and all pulling along. The more of these you activate (again, controlled by the nerves) the more bind and pull you have and the stronger the contraction of your muscle.\n\nOkay - so how do you trigger it and where does the calcium come in? The calcium is stored in the muscle fibre in a spot called the "sarcoplasmic reticulum". These are arrange at each end of the sarcomere in conjunction with the transverse tubules ("T-Tubules") which penetrate the spaces between sarcomeres and allow electrical signal to flow rapidly all over the muscle fibre.\n\nThe trigger mechanism to cause the muscle to move comes from the NERVES. So let's take a look here to find out how this comes about.\n\nThe nerves which carry the signal from the brain, via the spinal cord, to the muscles all have a long process called the AXON which joins on to the muscle at a place called the Neuromuscular junction.\n\nThe axon makes and stores special chemicals called Neurotransmitters (usually Acetylcholine). When they get the signal to say "make this muscle go" they release the neurotransmitters which float across the teenie tiny space and land on the muscle fibre part (called an End Plate) and pass the signal on to the muscle.\n\nThe presence of the neurotransmitter molecules
563473
Homeostasis \nHomeostasis is the physiological process by which the internal systems of the body (e.g. blood pressure, body temperature, acid-base balance) are maintained at equilibrium despite variations in the external conditions. \nThe body can maintain the fluid levels using the kidneys, these organs filter out harmful chemicals and excess liquid into the bladder from which the urine is then expelled.  Body temperature is regulated somewhat by the skin, example, if you are hot you begin to sweat and this helps to cool the body, if you are cold you shiver this helps to raise, the body temperature.
299314
By a process called HOMEOSTASIS which can also be described as a dynamic equilibrium. It is the maintenance of a relatively constant environment required for the optimal functioning of cells, maintained by the coordinated activity of numerous regulatory mechanisms, including the respiratory, endocrine, circulatory, and excretory systems.\nThe hypothalamus, a region of the brain that controls many homeostatic responses, is the control center. Thermoregulation is the ability of an organism to keep its body temperature within certain boundaries. Remember that thermoregulation is the ability but the actual process is called HOMEOSTASIS.
1184911
when we move our muscles,the energy comes directly from the glucose stores in the muscle itself by what is called aerobic respiration,which is the burning of glucose in the presence of oxygen,but after sometime of use the muscle needs more energy and the available oxygen wont be enough to make the aerobic respiration,so it shifts towards the anaerobic to produce energy and this type produces lactic acid,which accumulates in the muscle and causes it to spasm.\nusually muscle spasm resolves within 2 or 3 days,and using hot packs or massage with mild exercise will help.