Describe about water expulsion vesicle, Biology

Assignment Help:

The water expulsion vesicle (also known as a contractile vesicle) is an important osmoregulatory organelle in freshwater protists, which are hyperosmotic to surrounding water. Water constantly diffuses into cell and could cause the cell to burst if there wasn't some way to get it out. That is what water expulsion vesicle does. A network of collecting tubules extends throughout cells, and rich supply of mitochondria on the surface of tubules provides energy required to pump water from cytoplasm into the tubules. Tubules dump the water they've collected into water expulsion vesicle, which slowly fills. Once full, vesicle's membrane fuses with the outer plasma membrane creating a pore out of which excess water flows.

 

 


Related Discussions:- Describe about water expulsion vesicle

Explain aabout milk fats - edible fats, Milk Fats  Fats of this group a...

Milk Fats  Fats of this group are derived from the milk of ruminants, particularly cows and buffaloes. Although the major fatty acids of milk fat are palmitic, oleic and steari

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.

Explain about the anti obesity drugs, Explain about the Anti Obesity Drugs?...

Explain about the Anti Obesity Drugs? The anti-obesity drugs can be classified into two broad groups as indicated in the Figure. Drugs must be taken only under Doctor's

Explain transposition with vsd and pulmonary stenosis, Explain Transpositio...

Explain Transposition with VSD and Pulmonary Stenosis ? In the early years Rastelli and le Compte operations had 20 to 30 per cent mortality. This has been reduced to 5 per c

Causes of gerd, In addition, pregnancy or constipation may worsen GERD by i...

In addition, pregnancy or constipation may worsen GERD by increasing intra-abdominal pressure. Secondary causes of GERD include reflux caused by acid hypersecretory states, connec

Skeletal system - girdles, GIRDLES - (i ) PECTORAL GIRDLE - ...

GIRDLES - (i ) PECTORAL GIRDLE - 4 bones. It is located on posterolateral part of upper region of the throax. It consists of scapula & clavicle. Scapula is placed

Feline panleukopenia, Feline panleukopenia It is arguably the most importa...

Feline panleukopenia It is arguably the most important of all feline viral diseases and all members of the family Felidae are susceptible. This disease is commonly found in kitten

Blood plasma - circulation, Blood Plasma - Circulation Centrifugation...

Blood Plasma - Circulation Centrifugation of blood results in its separation into two portions - a packed mass of cells which constitute around 45 per cent of the volume of t

Name the hormone that makes the plants more tolerant, In humans, starch dig...

In humans, starch digestion begins in the buccal cavity but stops in the Stomach. Why? Name the two most biodiversity-rich zones of India. Name the hormone that makes the p

Define the drug and drug effect, Define the Drug and Drug Effect? In th...

Define the Drug and Drug Effect? In the discussions above, we reviewed the effect of food on drug metabolism. Interestingly, not only can drugs interact with food and alcohol,

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