Characteristics of hormones, Biology

CHARACTERISTICS OF HORMONES -

(1)      They are regulatory chemicals that control and coordinate functions of different body organs.

(2)      Hormones are formed by ductless or endocrine glands.

(3)      Hormones are poured into circulatory system in which they are soluble and carried to target cells.

(4)      They function as chemical messengers or information molecules.

(5)      Hormones generally function away from the area of their formation.

(6)      They are effective in very low concentration of picograms or micrograms. The concentration of testosterone is 30 -100 ng/ml.

(7)      Hormone molecules are small in size.

(8)      They belong to diverse categories of proteins, peptides, amino acid derivatives, amines, steroids, etc.

(9)      Hormone molecules get attached to the membranes of target cells at specific points having receptors for inward passage or reaction.

(10)     They inhibit or stimulate specific processes in the target cells.

(11)     Hormones do not provide raw materials or energy. They simply start certain reactions and are consumed in the process. (12)         Hormones are formed in response to specific stimuli.

(13)     They may be formed in the inactive state e.g., pro-insulin.

14)     Hormones control most actiyities like membrane permeability, cell division, cell growth, cell differentiation, regeneration, reproductive activity, production of enzymes and metabolism, ion and water balance of the body, adaptations and emergencies etc.

Posted Date: 10/2/2012 6:20:56 AM | Location : United States







Related Discussions:- Characteristics of hormones, Assignment Help, Ask Question on Characteristics of hormones, Get Answer, Expert's Help, Characteristics of hormones Discussions

Write discussion on Characteristics of hormones
Your posts are moderated
Related Questions
Q. Carbohydrates requirement in chronic diarrhoea? Adequate amount of carbohydrates i. e 60-65% of the total energy should be given to the patient. Easily assimilated carbohydr

Q. Is a gene the same as a DNA molecule? Genes are units of heredity. A gene is a section or segment of a DNA molecule. This section of DNA provides a genetic code for synthesi

In the human body, the potassium ion can pass easily through cell membranes, yet the potassium ion concentration is higher inside many cells than it is outside these cells. Could t

A cat has just arrived to the veterinary clinic with low blood pressure. The cat weighs 5 kg, and as the on call Vet you want to use a bag of saline to prepare a dopamine drip for

Q. Show characteristics of food products? These sensory characteristics of food products. Food quality, as such, can be divided into three main categories i.e. i. Appeara


Define Plan showing various steps of non-enzymatic browning? The plan showing the various steps of non-enzymatic browning is presented in figure Figure:

What are the homologous and the heterologous portions of the human sex chromosomes? The Homologous portion is that in which there are genes having alleles in both X and Y sex c

Reproduction in coelentrata

Determine about the Nervous System and Behaviour Damage to certain parts of the brain will be reflected as behaviour deficits. For example, damage to the temporal lobe may affe