Explain about the calcium and hypertension, Biology

Assignment Help:

Explain about the Calcium and Hypertension?

Chronic inadequate intake of calcium may play some role in etiologies of hypertension. Calcium deficiency has been linked to hypertension. Numbers of epidemiological studies, animal experiments and human clinical studies have reported an inverse relationship between Ca intake and blood pressure. Meta- analysis of studies reveal that Ca supplementation (median intake lg of Ca) resulted in reduction in systolic blood pressure in selected hypertensive patients. People who appear to benefit from calcium therapy are those who have low calcium intakes, low ionized calcium concentration or elevated PTH and those who have low renin activity and are salt-sensitive. The precise nature of the anti-hypertensive action of dietary calcium is not clear.

Calcium has a membrane stabilizing vasorelaxing effect on smooth muscle cells. Calcium can exert its effect through other mechanisms also. Salt sensitive, low renin individuals exhibit low plasma ionized calcium concentration, increased urinary calcium excretion and elevated PTH and calcitriol. Further work is still warranted in this aspect. It is, therefore, clear from our discussion above, that a positive calcium balance (i.e. net calcium retention) is required throughout life. A positive calcium balance is required throughout growth, particularly during the first 2 years of life and during puberty and adolescence. These age groups therefore constitute populations at-risk for calcium deficiency, as do pregnant women (especially in the last trimester), lactating women, post menopausal women and possibly, elderly men.


Related Discussions:- Explain about the calcium and hypertension

What is the life cycle type of bryophytes, Q. What is the life cycle type o...

Q. What is the life cycle type of bryophytes? As in all plants the life cycle of bryophytes is diplobiontic (alternation of generations) and in bryophytes the lasting form is t

Motor control in annelids and arthropods, Motor Control in Annelids and Art...

Motor Control in Annelids and Arthropods In annelids and arthropods generally, individual metameric ganglia of the ventral nerve cord are capable of initiating and keep locomo

Explain the importance the relationship of structure, Explain the importanc...

Explain the importance of understanding the relationship between structure and function?

Explain neurologic disease, Explain Neurologic disease For patients wit...

Explain Neurologic disease For patients with facial nerve palsy alone, oral doxycycline or amoxicillin may be effective. Patients with other neurologic involvement, such as men

Define anaemia in pregnancy, Define Anaemia in Pregnancy? Anaemia is th...

Define Anaemia in Pregnancy? Anaemia is the most common complication and is often compounded by low socio- economic status. However, it is seen frequently in upper income women

Cotyledon, Cotyledon is a leaf-like structure which is present in the seed...

Cotyledon is a leaf-like structure which is present in the seeds of the flowering plants; it appears during seed germination and sometimes is referred to as the seed leaf.

What is the trace element, What is a trace element and how are they importa...

What is a trace element and how are they important in organisms, give an example.

Explain the potential benefits of micro nutrients, Explain the Potential Be...

Explain the Potential Benefits of micro nutrients? The potential benefits of micro nutrients should also be taken into account when the nutrient allowances are defined for olde

Chemical substances that compose the plasma membrane, What are the chemical...

What are the chemical substances that compose the plasma membrane? Ans) The major constituents of the plasma membrane are phospholipids, proteins and carbohydrates. The phosphol

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd