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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.
Flowering and Endogenous Rhythms The last four decades of studies in animals and plant physiology have clearly established the existence of a biological clock mechanism to me
Define Some Example of Acidic and Basic Buffer? Frequently used example of acidic and basic buffer includes: - Acidic buffer: a mixture of CH 3 COOH (acetic acid) + CH 3 C
Describe how the hypothalamus regulates the secretion of anterior pituitary hormones and identify all of the individual hypothalamic regulatory factors. Describe how the hypothalam
What are the Technique of Operation in CPS? Percutaneous balloon valvotomy is the procedure of choice at any age. If this is not feasible, open surgical valvotomy is recommende
is cnidaria having both interacellular & extracellular digestion?
Select all that are true/correct: Stable atoms have no vacancies in their outer shell. Hydrogen is more stable than carbon Helium is more stable than carbon Helium is more stable t
Explain about the Alzheimer's Disease? Named after the German neurologist who first described it, Alzheimer's disease is the most common cause of progressive dementia, due to t
ELECTROCONVULSIVE THERAPY: 1) ConceptlMeaning of Electroconvulsive Therapy (ECT) Electroconvulsive Therapy (ECT) is a painless form of electric therapy. It is called as ph
lesson plan practical requirements
Q. Show the process of Construction of Keys? Keys are constructed using contrasting characters. The possible names in the key are divided into smaller and smaller groups. Each
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