Question:

Myxoedema occurs due to

Updated On: Aug 15, 2022
  • hypersecretion of thyroid hormone
  • hyposecretion of thyroid hormone
  • hypersecretion of parathormone
  • hyposecretion of parathormone
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The Correct Option is B

Solution and Explanation

Myxoedema or Gull's disease is caused by deficiency (hyposecretion) of thyroid hormone in adults. This disease is characterized by puffy appearance due to accumulation of fat in the subcutaneous tissue because of low. metabolic rate. The patient lacks alertness, intelligence and initiative. He also suffers from slow heart beat, low body temperature and retarded sexual development. This disease can be treated by administration of thyroid hormones.
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Concepts Used:

Chemical Coordination and Integration

The chemical coordination and integration of all physiological functions in the animal body are jointly synchronized by the neural and endocrine systems. The control and coordination of body functions are executed by the endocrine glands. They are ductless glands that secrete severel hormones to control and coordinate body functions.

Human Endocrine System:

The human body has several endocrine glands located in different parts. They cover the pituitary gland, thymus, thyroid gland, pineal gland, parathyroid, pancreas (dual gland), adrenal gland, and gonads (testes and ovaries). The liver, kidney, heart, and gastrointestinal tract also produce hormones in small traces to harmonize the functioning of these organs.

The Hypothalamus comprises groups of secretory cells called nuclei which secrets various hormones. These hormones released by the hypothalamus are important in regulating the synthesis and secretion of pituitary hormones.

Functions of Endocrine Glands:

  • Pituitary Gland
  • Pineal Gland
  • Thyroid Gland
  • Parathyroid Gland
  • Thymus
  • Adrenal Gland
  • Pancreas
  • Testes
  • Ovary
  • Hormones of Kidney, Heart, and Gastrointestinal Tract