Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Protozoans - Body Form
The protozoan body is usually bound only by the cell membrane called plasmalemma. In some protozoans such as in ciliates the rigidity and the flexibility of the body is maintained by a cytoskeleton located immediately below the cell membrane which together with it forms the pellicle. The cytoskeleton is composed of filamentous proteins, microtubules or vesicles or a combinations of all three. In many protozoans like dinoflagellates, spore forming protozoans and. ciliates, vesicles occur below the cell membrane as flattened more or less continuous layer referred to as alveoli. They help to form a rigid skeleton.
Figure: Endoskeletons of Protozoans
A) Filamentous proteins form dense mesh called epiplasm Eg. Euglena and some ciliates B) Micro tubular corset in flagellates, in spore forming protozoa and some ciliates C) Axial skeleton of micro tubes D) Axopod microtubules radiate like stars from centroplast E) 'Empty' alveoli of ciliates F) Cellulose plates in alveoli of dinoflagellates form rigid skeleton.
Exoskeletons secreted onto the outer surface of the cell are also seen in a large number of protozoans. These protozoans secrete layers of certain organic materials like gelatin, cellulose or tectin (a mucus like substance) around their plasmalemma. Some secrete an organic matrix containing minerals like silica or calcium carbonate. Often foreign bodies such as sand particles also get mixed up with the organic matrix to strengthen it. These chemicals organise to form theca, shell, lorica or cyst in different protozoans to provide protection.
Define Carbohydrate requirement to avoid underweight problem? Liberal amounts of easy to digest carbohydrates should be included in the diet. The intake of dietary fibre should
Discovery of Plant Hormones To date, five major classes of plant hormones have been discovered namely auxins, gibberellins, cytokinins, abscisic acid and ethylene. It is possi
Seminal plasma in human males is rich in : 1. fructose and calcium 2. glucose and calcium 3. DNA and testosterone 4. ribose and potassium Fructose and Calcium
How Ignorance and Poor Socioeconomic cause PEM? Status Improper childcare, either as a result of lack of knowledge or lack of time for mother, could also contribute to the onse
Brucellosis Brucellosis is a global problem because of its public health and economic implications. It is one of the serious diseases affecting livestock all over the worlds th
Explain the Decolourizing Agent - Ziehl-Neelsen Method? Acid alcohol - a mixture of 95% ethanol and 3% HCI - is used for decolourization. Before decolourization, smear is allow
Q. Locating the Problem in diabetes mellitus? After having good rapport with the client and the family; you will try to collect the information about the patient, family and he
Hypoglycaemia When Driving Hypoglycemia is particularly dangerous if it happens to someone who is driving. People with hypoglycemia may have trouble concentrating or se
From where does the cell get oxaloacetic acid for krebs citric acid cycle? Oxaloacetic acid is also formed when pyruvate is acted upon by pyruvate carboxylase in response to an
Define Role in Glucose, Lipid and Nucleic Acid Metabolism? Chromium leads to a decrease in blood glucose concentration in people with elevated glucose levels and an increase in
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!
whatsapp: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd