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!
Contractile vacuole - Protozoans
The contractile vacuoles may differ in complexity in various groups of protozoans. In amoebae the vacuoles are carried around in the cytoplasm. 'Small vesicles join them emptying their contents into the vacuoles till the vacuole joins the membrane emptying its content to the outside.
In ciliates (e.g. Paramecium) the contractile vacuoles have a more complex structure. The contractile vacuole is located in a fixed position with an excretory pore leading to the outside surrounded by ampullae of feeder canals. The feeder canals are surrounded by a network of fine canals (20nm) in diameter, which are also connected to the tubular system of endoplasmic reticulum. The ampullae are surrounded by a bundle of fibrils that may have a role in contraction of the ampullae. The ampullae contract thereby, filling the vacuole and when the contents of the vacuole are discharged to the exterior the ampulae get disconnected so that back flow is prevented.
Figure: The contractile vacuole of Amoeba proteus is surrounded by tiny vesicles that fill with fluid, which is then, emptied into the vacuole. Note the numerous mitochondria that are believed to provide energy needed to adjust' the salt - content of the tiny vesicles.
Describe in brief about Pseudoisoehromatic Plates test Commonly known as Ishihara's plates, these reveal one pattern to the normal eye and another to the colour deficient. Colo
Studying leaf arrangements Observe as many growing plants as possible by looking down on them from above. Draw sketches of the dissimilar patterns of leaf arrangement.
E s o pha g e a l obstruction It is also known as choke. It may be acute or chronic and is characterized by inability to swallow, regurgitation and bloat. E t
Is it possible to perform investigation of natural paternity, maternity or brotherhood and sisterhood using the ABO blood typing? By using an ABO blood typing it is possible on
Chest Complications : Many of the patients undergoing coronary artery bypass surgery have risk factors for post-operative lung complications. These include old age, chronic obstru
Tubercular Meningitis (TBM) Tubercular meningitis is a serious complication of childhood tuberculosis. It usually occurs secondarily to primary infection with tuburculosi
how do work in human body and animals
Q. What are the endocrine glands that regulate sexual activity in males? How does this regulation work and what are the involved hormones? In males the sexual activity is regul
Describe the advantages of Clinical neuropsychology Clinical neuropsychology seeks like as understanding, particularly, in the case of how damaged or diseased brain structures
Q Are bacteria the only prokaryotic beings? Prokaryotic beings are classified into two big groups: bacteria and archaebacteria (this last also known as eubacteria). Compared
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