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
What are the examples of homeostasis? Regulation of body temperature, control of blood glucose levels, the regulation of salt and water balance are the example of homeostasis

Term Translation or protein synthesis, is quite similar in eukaryotes and prokaryotes. We will look at the details of the process in prokaryotes and consider the differences in euk

TYPES OF SPERM Mainly two types . (1) Flagellated Sperm - Generally all sperm are monoflagelated, but in todfish or opsonus sperm is biflagelated. (2) Non flagellated spe

There are specific sensitive/critical periods in development during which acquisition of certain skills is substantially easier than at other times. In the animal domain there are

Why is drosophila a convenient animal for the study of linked genes? The fruit fly drosophila is appropriate for the study of Genetics because it presents many distinct traits

Explain the stages in taxonomic procedures - Beta Taxonomy This stage is also known as macro taxonomy or synthesis taxonomy. At this level the species are arranged or classifie

Q. What is biological control? The Biological control is a natural method to control the size of microorganism, animal or plant populations. The Biological control is based on

What is the difference between Mitosis and Meosis?

Hydrogen bonds are important for all of the following except:: a) Allowing carbohydrates to dissolve in water b) Stabilizing the three-dimensional shape of proteins. c) Ma

Q. In general what are the products and reagents of fermentation? In fermentation glucose sugar is degraded into pyruvic acid each glucose molecule forms two pyruvic acid molec