Question:

Increase in bleeding time and delay in blood coagulation is due to the deficiency of which hormone ?

Updated On: Jul 28, 2022
  • Adrenaline
  • Noradrenaline
  • Parathormone
  • Thyroxine
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The Correct Option is C

Solution and Explanation

Calcium plays an important role in blood clotting. Parathormone, a hormone released by parathyroid glands, increases calcium level in the blood. Therefore, deficiency of this hormone will decrease $Ca^{2+}$ level in blood, thus leading to delay in blood clotting and increase in bleeding time.
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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