Homeostasis is defined as an animal maintaining a relatively constant internal environment. Mammals do this with regard to blood in several different ways. They maintain cardiac output and mean arterial blood pressure by means of the baroreceptors, adjusting heart rate and stroke volume (which is directly related to strength of contraction). They maintain the blood osmolarity by means of several of the kidney hormones. They maintain the level of sugar in the blood by means of the hormones insulin and glucagon. The mechanism in almost all cases involves a negative feedback loop. In order to provide details, you have to indicate what characteristic of blood is being maintained.
2007-05-17 15:26:05
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answer #1
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answered by kt 7
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Homeostasis is the ability or tendency of an organism or cell to
maintain internal equilibrium by adjusting its physiological processes. Your
normal body temperature, for example, is around 98.6 deg F. If you start to
get cold you shiver. Shivering is a physiological process designed to keep
your body temperature from dropping below 98.6 deg F. Also, you may put a
coat on. This will also help keep your body temperature from dropping, but
it is not a physiological process. Your body has many physiological
processes designed to maintain many equilibriums.
The hypothalamus is a group of neurons, at the base of your brain, and
forms the primary link between the nervous system and the endocrine system.
Among the homeostatic processes controlled by the hypothalamus are: thirst,
hunger, daily (circadian) rhythms, body temperature and blood pressure.
Your body has processes that happen that keep everything at an even rate.
If things get out of balance, your body tries to bring them back into balance.
The hypothalamus is a very important monitor of homeostasis. As blood
circulates through the brain, it keeps track of many substances. For instance,
the "thermostat" of the body is in the hypothalamus. If the blood coming to
the brain is not warm enough, it will make the body do things to make the
blood warmer again. For example, you will start to shiver which makes your
muscles contract, which burns energy and releases heat. If the blood is too warm,
your sweat glands are signaled to begin producing sweat which cools the body.
for more info
http://www.gonzaga.k12.nf.ca/academics/science/sci_page/biology/homeostasis_notes.htm
2007-05-17 22:27:28
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answer #2
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answered by Kevin 5
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when referring to maintaining homeostasis of blood, or achieving homeostasis, you are saying there is no bleeding...
2007-05-17 23:17:33
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answer #3
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answered by mago 5
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