Hormones: Mechanism and Regulation

by Afridi, Maham

Biochemistry

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03:59
Hormones: Mechanism and Regulation
Dnaulj8qro54nhsd28yj 180609 s1 afridi maham introduction to hormones
18:01
Introduction to Hormones
Lwaq7znnr5pivbsasti9 180609 s2 afridi maham classification of hormones
08:23
Classification of Hormones
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19:17
Mechanism of Action of Hormones - I
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11:08
Mechanism of Action of Hormones - II
Qxyldkwosk6z3djttoim 180609 s5 afridi maham regulation of hormone secretion
10:28
Regulation of Hormone Secretion

Lecture´s Description

Introduction to Hormones
In this lecture ´´Hormones: Mechanism and Regulation´´ is explained. Section one is about Introduction to Hormones. At first educator gives the introduction and let us know the definition of hormones. In the next slide similarities of hormone and enzyme is reported. Likewise, dissimilarities of hormone and enzyme is explained. In the last slides glands secreting hormones and glandular tissues secreting hormones are discussed in detail.


Classification of Hormones
Section two is about ´´Classification of Hormones´´. Steroid hormones, Amino acid derivatives, and Peptide/Protein hormones are early theme under discussion. Moving onward, factors regulating hormone action are focused.


Mechanism of Action of Hormones - I
Section three is about ´´Mechanism of Action of Hormones – I´´. Hormones serve as inducers or repressors in the genetically controlled synthesis of certain key cellular enzymes. In the next few slides interaction with nuclear chromatin (nuclear action) is discussed in detail. Membrane receptors are also explained. Moreover, information is conveyed about stimulation of enzyme synthesis at the ribosomal level. Then the direct activation at the enzyme level is pursued. Finally, c-AMP and hormone action comes under consideration.


Mechanism of Action of Hormones - II
Section four is about ´´Mechanism of Action of Hormones – II´´. The very first slide describes the role of polyphosphoinositol and diacylglycerol in hormone action. Then role of calcium in hormone action is explained. After that role of c-GMP in hormone action is highlighted. Role of phosphorylation of tyrosine kinase is covered in the last slide.


Regulation of Hormone Secretion
Section five is about ´´Regulation of Hormone Secretion´´. Educator tells that hormone secretion is regulated by neuroendocrinal control mechanism. When there is a high blood level of a target gland hormones, it may inhibit the secretion of the tropic hormone stimulating that gland resulting in feedback control mechanism. By compiling this section endocrine rhythms are focused.

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