Parathyroid hormone (a) increases glucose level in blood (b)...

Name: Problem 10, Chapter 47: Biology
Uploaded: 2021-12-15T18:33:44-08:00
Duration: 34 s
Channel: Hunza Gilgit
Description: Parathyroid hormone (a) increases glucose level in blood (b) helps body cope with stress (c) increases permeability of kidney tubules to water (d) promotes uptake of amino acids (e) increases calcium concentration in blood.

Parathyroid hormone (a) increases glucose level in blood (b) helps body cope with stress (c) increases permeability of kidney tubules to water (d) promotes uptake of amino acids (e) increases calcium concentration in blood.

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Key Concepts

Parathyroid Hormone (PTH)

Parathyroid hormone is a secreted peptide produced by the parathyroid glands that plays a crucial role in regulating blood calcium levels. Its main actions include stimulating osteoclast activity to release calcium from bones, increasing calcium reabsorption in the kidneys, and enhancing the activation of vitamin D, which in turn increases calcium absorption from the gastrointestinal tract.

Calcium Homeostasis

Calcium homeostasis refers to the physiological mechanisms that maintain blood calcium levels within a narrow range, ensuring proper functioning of many bodily processes such as muscle contraction, nerve conduction, and bone integrity. PTH is a key regulator in this system, acting to correct hypocalcemia by mobilizing calcium from bones and reducing renal excretion.

Hormonal Specificity

Hormonal specificity is the concept that each hormone acts on specific receptors to trigger distinct cellular responses. This explains why PTH specifically influences calcium regulation and bone metabolism, while other hormones like insulin, ADH, or cortisol are responsible for regulating glucose metabolism, water balance, and stress responses respectively.

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