Ageing, Biology

AGEING -

The appearance of some changes as the body grows older is called ageing. It ultinately leads to death.

It can be defined as deteoration in structure and function of the body cells, tissues & organs of individual.

All living being have a specific life span. Maximum life span in tortoise.

MORPHOLOGICAL AND PHYSIOLOGICAL CHANGES -

1.      Decreased efficiency of heart to pump blood.

2.      Reduction in the number of nephrons & taste buds.

3.      Less formation of R.B.C.

4.      Cells loss the capacity to retain water.

5.      Skin becomes dry and wrinkeled.

6.      Formation of urine is less.

7.      Muscles become weak.

8.      Bones become brittle.

CELLULAR CHANGES -

1.       Increased number of chromosomal aberration in liver cell.

2.       Greater amount of defective proteins in cell.

3.       Accumulation of pigment.

4.       Decreased power of multiplication in cell.

EXTRA CELLULAR CHANGES -

1.       Collagen becomes less permeable, rigid & insoluble.

2.       O& nutrients do not diffuse in cell easily.

3.       Excretion is decreased.

4.         Diffusion is less. 

Posted Date: 10/4/2012 5:55:46 AM | Location : United States







Related Discussions:- Ageing, Assignment Help, Ask Question on Ageing, Get Answer, Expert's Help, Ageing Discussions

Write discussion on Ageing
Your posts are moderated
Related Questions
Ask question #Minimum 100 words acceptethe best topics for seminAR d#

Triacylglycerols, cholesterol and phospholipids are associatively insoluble in aqueous solution. Thus, they are transported around the body in the blood as parts of lipoproteins.

Q. Demonstration of tremendous diversity? A objective of taxonomy is the assemblage of knowledge gained. This is usually in the form of treatises useful to fellow scientists an


What is ADP phosphorylation? What respectively are photophosphorylation and oxidative phosphorylation? ADP phosphorylation is the addition of one inorganic phosphate in the mol

LIVING FOSSILS - 1. Limulus (King crab) Arthropoda 2 . Neopelina Mollusca 3 .

Give ditail account on regernation in invertebrates and vertabrites

An element playing significant role in nitrogen fixation is : 1.  Molybdenum 2. Copper 3. Manganese 4. Zinc An element playing significant role in nitrogen fixation

Initiation Codon is the codon at which the translation of a polypeptide chain is initiated. This is generally the first AUG triplet in the mRNA molecule from 5' end, where the rib

Q. Show Artificial systems of classification of plants? Carolus Linnaeus (1707-1778) popularly known as Carl Von Linne was born on May 1707 at Result, a small village in Smalan