Protoplasm, Biology

Assignment Help:

Protoplasm

  • Also known as bioplast.
  • It is gelly like & semi liquid in appearance.
  • It is translucent in nature.
  • It is colourless, oderless, viscous, elastic & granular in nature.
  • Protoplasm is essential for life.
  • Protoplasm is the fluid along with all the structures of cell bounded with in the limits of cell membrane.
  • Protoplasm includes plasmalemma, cytoplasm & nucleus.
  • Different types of granules are embeded in it, capable to perform all vital activities, so protoplasm is vector for vital activities.
  • Strusburger differentiated protoplasm into somatoplasm & germplasm in body.
  • In Amoeba somatoplasm & germplasm are not differentiated so body is known as soma.
  • Main component of protoplasm is water, functions as solvent.
  • By increasing age water conetents are reduced so activity becomes dull.
  • In dorment seed water is less as a result seeds are inactive.
  • According to Renke & Roderwald analysis of protoplasm is not possible in living state because most of the reactions are exothermic.
  • On analysis water, CO & amonia are formed.
  • Due to proteins protoplasm is coloidal in nature.
  • It is polyphagic and reversible.
  • Acidic group of protein controls chemical equilibrium.
  • Protoplasm is crystallo-colloidal mixture, explained by Fisher & Hardy.
  • It's particle size is .001m to .1m..
  • In colloidal sol, gel, arosol & emulsion are clear.
  • Except arosol remaining 3 present in living system.
  • Colloidal system is composed of 2 stages-

(i) Dispersion phase/ Continuous form / Intermicellus

(ii) Dispersed phase/ discontinuous form/ micellus

  • On the basis of these 2 stages, colloids are of following types -

(A) Sol - Dispersion phase is liquid. Dispersed phase is solid. In sol stage protoplasm in less viscous. Sol stage occure in many living cells. It is less granular. Protein chain is more folded.

(B) Gel - Dispersion phase is solid. Dispersed phase is liquid. Protoplasm is more viscous. It is more granular. Protein chain is unfolded.

  • Sol stage provides          - Cyclosis, Brownian movements, High reactivity to protoplasm.
  • Gel stage provides          - Elasticity, Contractibility, Rigidity, Viscosity
  • Sol gel stages are interchangeable, so protoplasm is a reversible colloidal system.
  • Non-living colloids are irreversible.
  • Protoplasm has motion because of cyclosis, brownian movement & amoeboid movement.
  • These movement depends on  - age of cells, amount of water, genetic factors, chemical composition of protoplasm.
  • With increase in age, brownian movement is stoped.
  • So, ultimately it becomes inactive i.e. death of protoplasm.
  • Mg+2 controls sol gel stages.
  • Sol gel conversion is a physico chemical reaction.

(c) Emulsion

  • Two liquids of different density are mixed, e.g. haemolymph.

(d) Aerosol

  • Solid particles are dispersed in gas.

Related Discussions:- Protoplasm

Characteristics of female''s skeleton, CHARACTERISTICS OF FEMALE'S SKELETON...

CHARACTERISTICS OF FEMALE'S SKELETON - 1.      Skull is lighter. 2.      Shoulders are nanow. 3.      Sacrum is shorter but wider. 4.      Pelvis is wider. 5.

Why is it important to study biology, Why is it important to study biology?...

Why is it important to study biology? By studying biology, you can create informed decisions on issues that impact you and society, like environmental issues, health, and tech

Chitra valve-types of valves, Chitra Valve :  This valve was desi...

Chitra Valve :  This valve was designed and developed at Sri.Chitra Institute of Medical Sciences in Thiruvananthapuram and marketed by TTK Industries. It is a tilting di

Artificial skin, Artificial Skin: The skin generated in vitro is in fac...

Artificial Skin: The skin generated in vitro is in fact the epidermis portion of skin only; when the epidermis is applied to the burnt part, this leads to the regeneration of d

How do respiratory pigments act, How do respiratory pigments act? Respi...

How do respiratory pigments act? Respiratory pigments are oxygen-carrying molecules present in the blood. When the oxygen concentration is high, for instance, in the pulmonary

What is the greenhouse effect, What is the greenhouse effect? The green...

What is the greenhouse effect? The greenhouse effect is a phenomenon in which atmospheric gases like CO 2 trap reradiated heat from the Earth, much as the glass panes of a gre

Nucleus, NUCLEUS First described and christened by Robert brown 1831, a...

NUCLEUS First described and christened by Robert brown 1831, a nucleus is the largest and most important organelle of eukaryotic cells. It is membrane bound and generally locat

What are the symptoms of diabetes, What are the symptoms of diabetes H...

What are the symptoms of diabetes Healthy Person P takes a drug that produces a strong effect on the epithelial cells of the kidney collecting duct within one hour and lasts f

Main components of blood plasma, Main Components of Blood Plasma You w...

Main Components of Blood Plasma You would recall the various types of cells found in blood. The composition of human blood plasma is given in Table. The very structure of bloo

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd