Parathyroid disorders, Biology

PARATHYROID DISORDERS -

(i) Hypoparathyroidism (deficiency of PTH). It causes the lowering of blood calcium level. This increases the excitability of nerves and muscles, causing cramps and convulsions. Sustained contractions of the muscles of larynx, face, hands and feet are produced. This disorder is called parathyroid tetany or hypocalcaemic tetany.

(ii) Hyperparathyroidism (excess of PTH). Excess of PTH draws more calcium from the bones.

  • It causes demineralisation, resulting in softing and bending of the bones. Some of the bone substance is replaced by cavities that are filled with fibrous tissues.
  • Osteoporosis is common in women who have reached menopause (cessation of menstruation). An excess of parathormone also causes calcium to be deposited in the kidneys. Analysis of the content of kidney stones sometimes suggests the presence of a parathyroid tumour.
Posted Date: 10/2/2012 6:51:52 AM | Location : United States







Related Discussions:- Parathyroid disorders, Assignment Help, Ask Question on Parathyroid disorders, Get Answer, Expert's Help, Parathyroid disorders Discussions

Write discussion on Parathyroid disorders
Your posts are moderated
Related Questions
H yd r o p e r i c a r d i um - h e pa titi s syndrome Also known as 'Angara disease' or 'leachy heart disease', this complex illness of poultry spread rapid

Q. As a result of the DNA replication two DNA molecules come into existence. Why is it not correct to assert that the two "new" DNA molecules are created? What is the name given to

What is L forms of bacteria?

How to do Glucose test A glucose test is a type of blood test used to determine the amount of glucose in the blood. There are several different kinds of glucose tests:  "

What is the difference between amnion and chorion? Amnion is the membrane that covers the embryo. Chorion is the membrane that covers the amnion, the yolk sac and the allantois

Synergistic and Sequential Effects of Hormones In vitro studies on callus and suspension cultures have brought out two interesting findings. The nature and direction of differ

Q. What is the estimated percentage (in mass) of water in the human body? Is this percentage expected to be larger in the adult or in the old individual? Approximately 65% of t

How do cells obtain energy for their functioning? Cells obtain energy for their metabolic reactions from the breaking of organic molecules with high energetic content. This ene

Epitope: As related to the protein antigens, B-cell epitopes comprises the amino acid residues of the protein molecule in which interact directly through the noncovalent bonds wit

If the condition or the post disease as a result of intraradicular infection----> treated conventionally via apex " non-surgical ", ---->Here we have 2 options either coronal