Shopping on line can be easy, simple and save you lots of money. It can also take a lot of your time, frustrate you, and result in unwanted purchases. Now the same can be said for regular high street shopping, but with the vast opportunity presented by the Internet it will pay you to spend a few minutes reading this and understanding how to better optimize your Autoregulation shopping experience:
1. Compare - without doubt the biggest advantage that the Autoregulation offers shoppers today is the ability to compare thousands of Autoregulation at a time. This is a great thing, but not necessarily all the time! Too much can be daunting at times so take advantage of the great comparison sites and where possible let them do the hard work for you.
2. Research - if it has been said it will be on the internet. Ignorance is no longer a justifiable reason for buying the wrong thing. Take the time to research in detail everything that you could possible want to know about
3. Testimonials - don't know anybody that has bought a Autoregulation? Wrong! If the Autoregulation is good the internet will let you know. Use the Internet as a friend and get testimonials before you buy.
4. Questions - Got a question about Autoregulation then search the Forums, FAQ's, Blogs etc. Don't be afraid to ask .....
5. Reputation - Never heard of the company selling Autoregulation? Don't worry, no reason why you should know every company in the world, but you know someone that does! Use the internet to find out what people are saying about Autoregulation and build up a picture of their reputation for sales, returns, customer service, delivery etc.
6. Returns - still worried that even after all of the above your Autoregulation wont be what you want? Check out the returns policy. There is so much competition now that someone, somewhere is bound to offer the terms that you are comfortable with.
7. Feedback - happy with your Autoregulation then let people know, after all you are depending on others people input in your buying decision, so why not give a little back.
8. Security - check for the yellow padlock on the Autoregulation site before you buy, and the s after http:/ /i.e. https:// = a secure site
9. Contact - got a question about Autoregulation, or want to leave a comment then check out the sites contact page. Reputable companies have them and respond.
10. Payment - ready to pay for your Autoregulation, then use your credit card or PayPal! Be aware of companies that don't accept them, there may be genuine reasons but given the huge amount of choice you have when buying online there is no reason at all not to buy via credit card or PayPal.
Autoregulation is a specific form of
homeostasis used to describe the tendency of the body to keep blood flow constant when blood pressure varies..
While most systems of the body show some degree of autoregulation, it is most clearly observed in the kidney, the
heart, and the
brain.http://www.cvphysiology.com/Blood%20Flow/BF004.htm Perfusion of these organs (especially the latter two) is essential for life, and through autoregulation the body can divert blood (and thus,
oxygen) where it is most needed.
One key component of autoregulation is the absence of central control. The "auto" in autoregulation refers of the abiliity of the organ to maintain a stable flow without the involvement of the autonomic nervous system.
Renal autoregulation
In the kidneys, autoregulation is primarily concerned with maintaining renal blood flow and
glomerular filtration rate.http://people.bu.edu/fgarcia/lectures/renal1/sld010.htm
There are two main techniques by which renal autoregulation is maintained:http://www.fys.dtu.dk/Centre/BioCom/Research%20projects/Nephron%20Autoregulation.aspx
Cardiovascular autoregulation
In the heart, the behavior of autoregulation is similar to that in the kidney, but there is no macula densa involved in the circuit. In the case of heart tissue that is in a state of high metabolic activity, autoregulation occurs due to increased metabolic bi-products such as lactic acid,
carbon dioxide, and decreased oxygen and causes
Coronary circulation dilation. The autoregulation of coronary vessels is mediated by the equilibrium of ATP, ADP, AMP, and Adenosine in the myocardial cell. When there is a high amount of oxygen, the equilibrium is shifted towards ATP. When there is a lack of oxygen, it is shifted toward Adenosine. Adenosine causes vasodilation and therefore increases the supply of oxygen.
Cerebral autoregulation
More so than most other organs, the brain is very sensitive to overperfusion, and cerebral autoregulation plays an important role in maintaining an appropriate blood pressure to that region. More detail is available at Cerebral perfusion pressure.
See also
References
sr:Ауторегулација
Autoregulation is a specific form of homeostasis used to describe the tendency of the body to keep blood flow constant when blood pressure varies..
While most systems of the body show some degree of autoregulation, it is most clearly observed in the kidney, the
heart, and the
brain.http://www.cvphysiology.com/Blood%20Flow/BF004.htm Perfusion of these organs (especially the latter two) is essential for life, and through autoregulation the body can divert blood (and thus,
oxygen) where it is most needed.
One key component of autoregulation is the absence of central control. The "auto" in autoregulation refers of the abiliity of the organ to maintain a stable flow without the involvement of the
autonomic nervous system.
Renal autoregulation
In the
kidneys, autoregulation is primarily concerned with maintaining
renal blood flow and glomerular filtration rate.http://people.bu.edu/fgarcia/lectures/renal1/sld010.htm
There are two main techniques by which renal autoregulation is maintained:http://www.fys.dtu.dk/Centre/BioCom/Research%20projects/Nephron%20Autoregulation.aspx
- Myogenic mechanism: as blood flow increases, the afferent arterioles are stretched, they contract, and subsequently reduce blood flow
- Tubuloglomerular feedback: the macula densa "senses" the blood pressure and causes vasoconstriction
Cardiovascular autoregulation
In the heart, the behavior of autoregulation is similar to that in the kidney, but there is no macula densa involved in the circuit. In the case of heart tissue that is in a state of high metabolic activity, autoregulation occurs due to increased metabolic bi-products such as lactic acid,
carbon dioxide, and decreased oxygen and causes
Coronary circulation dilation. The autoregulation of coronary vessels is mediated by the equilibrium of ATP, ADP, AMP, and Adenosine in the myocardial cell. When there is a high amount of oxygen, the equilibrium is shifted towards ATP. When there is a lack of oxygen, it is shifted toward Adenosine. Adenosine causes vasodilation and therefore increases the supply of oxygen.
Cerebral autoregulation
More so than most other organs, the brain is very sensitive to overperfusion, and cerebral autoregulation plays an important role in maintaining an appropriate blood pressure to that region. More detail is available at
Cerebral perfusion pressure.
See also
References
sr:Ауторегулација
