why is it important for the body to maintain a stable blood pressure within normal range?

Question

and what structures are primarily responsible for detecting any change?

Answer 1

Blood pressure is important to make sure that blood can move against gravity to the brain and also to maintain normal functioning of the kidney and other organs.

If it is too low, there could be a build up of fluid in tissues such as the feet and ankles and it could also mean that not enough oxygen gets to the brain leading to fainting and black outs.

If it is too high, it can damage artery walls and as the previous posts noted, this can cause heart attacks and strokes.

Blood pressure is detected by strech receptors found in artery walls and a homeostatic mechanism may then kick in to reduce water content of blood, this may reduce the blood pressure.

HTH x

Answer 2

Maintaining blood pressure within normal range can ensure the blood to be pumped into every knook and cranny of our body. If the pressure is abnormally high, or called hypertension, stroke or heart attack can easily occur. The walls of the blood vessels might not sustain pressure exerted higher than usual. Besides, the high pressure induces the heart to grow thicker in order to support the increased pressure by the growth of unhealthy tissues known as atheroma. This weakens the heart.

If the blood pressure is too low, known as hypotension, blood might not be able to reach certain body part, thus resulting in local cell death.

Mechanisms that monitor the changes of blood pressure involve baroreceptors. These receptors are sensitive nerves lying beneath the arteries and heart walls. They detect the variation of pressure constantly. Any significant changes of blood pressure will cause the baroreceptor to trigger a hormonal response which includes the release of angiotensin II and aldosterone, and also nervous response by regulating the parasympathetic [to reduce the heart rate] or sympathetic nervous system [to increase the heart rate].

Answer 3

Blood pressure is the pressure exerted by the blood at right angles to the walls of the blood vessels.
Typical values for a resting, healthy adult human are approximately 120 mmHg systolic and 80 mmHg diastolic

All levels of blood pressure put mechanical stress on the arterial walls. Higher pressures increase heart workload and progression of unhealthy tissue growth (atheroma) that develops within the walls of arteries. The higher the pressure, the more stress that is present and the more atheroma tend to progress and the heart muscle tends to thicken, enlarge and become weaker over time.
Persistent hypertension is one of the risk factors for strokes, heart attacks, heart failure, arterial aneurysms, and is the leading cause of chronic renal failure.

Low blood pressure may be a sign of severe disease and requires urgent medical attention.
When blood pressure and blood flow decrease beyond a certain point, the perfusion of the brain becomes critically decreased (i.e., the blood supply is not sufficient), causing lightheadedness, dizziness, weakness and fainting.

Answer 4

3 years ago, I was diagnosed - hypertension with a reading of 160/100. I used to feel dizzy a lot, my legs had awful cramps, and levels were very low in my potassium, causing my fingers and toes to always cramp together. One day I started to feel really faint while I was driving with my daughter in the back seat and I passed out, hitting 3 cars and ending up in a ditch. That moment,I knew I had to do something because my meds weren't working. I heard about this diet from a friend and thought I'd give it a shot. The results have been remarkable. In just 21 days, I honestly can't remember feeling this good, my blood pressure went from 175/110 to 125/70.

Answer 5

High blood pressure is extremely dangerous and can lead to heart attacks or strokes. If left undetected, it can also cause permanet damage to major organs, including the kidneys, liver and eyes.

Low blood pressure is less serious, but can lead to fainting.

There are few symptoms with abnormal blood pressure, although sometimes can be associated with headaches. The only real test is to go to your nurse or doctor to have it checked regularly.

Answer 6

Because high or low blood pressure is dangerous and can lead to heart attacks .....you could have a brain tumour,,,,,you could have a stroke etc