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What is a nematocyst?

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โˆ™ 2009-04-25 13:36:23

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s a type of venomous cell unique to the phylum Cnidaria (corals, sea anemones, hydrae, jellyfish, etc.). The cnidocyte cell provides a means for them to catch prey and defend themselves from predators. Despite being morphologically simple lacking a skeleton and usually being sessile, cnidarians prey on fish and crustaceans. A cnidocyte fires a structure that contains the toxin, from a characteristic sub-cellular organelle called a cnidocyst (also known as a cnida or nematocyst). This is responsible for the stings delivered by jellyfish. s a type of venomous cell unique to the phylum Cnidaria (corals, sea anemones, hydrae, jellyfish, etc.). The cnidocyte cell provides a means for them to catch prey and defend themselves from predators. Despite being morphologically simple lacking a skeleton and usually being sessile, cnidarians prey on fish and crustaceans. A cnidocyte fires a structure that contains the toxin, from a characteristic sub-cellular organelle called a cnidocyst (also known as a cnida or nematocyst). This is responsible for the stings delivered by jellyfish.

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Q: What is a nematocyst?
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What causes a nematocyst to discharge?

Nematocyst discharge is triggered by an immediate approach or a foreign stimulus. When the cell is discharged, a brand new nematocyst is created as the system in each cell can only be activated once.


What is the function of a nematocyst?

prey capture


What is a stinging mechanism in a cnidocyte?

nematocyst


What is the function of nematocyst?

prey capture


What is a stinging cell cnidarian called?

it is a nematocyst


What is mechanism of nematocyst discharge?

black people


What is the poison called that is injected by nematocyst?

venom


What are nomatocyst?

If you mean Nematocyst, a structure such as jellyfish


What is the difference between a cnidocyte and a nematocyst?

A cnidocyte is a type of venomous cell that is found in coelenterates. A nematocyst, meanwhile, is a specialized organelle found inside the nematocysts of coelenterates.


How can coral protect itself from enemies?

By corallite and nematocyst .


Do cnidarians have nematocyst?

Yes, they do. They use it to eat.


What body part do cnidarians use to trap food?

nematocyst


What is the name of the stinging cell found on the tentacles of a hydra?

nematocyst


How does nematocyst?

Question needs more context in order to be answered.


What causes nematocysts to discharge?

Nematocyst discharge is triggered by an immediate approach or a foreign stimulus. When the cell is discharged, a brand new nematocyst is created as the system in each cell can only be activated once.


How do nematocysts work for Cnidarians?

A nematocyst is a specialized organelle found in all cnidarians. Each nematocyst features a coiled, threadlike tube lined with a series of barbed spines. The nematocyst is used to capture prey and may also be used for defense purposes. When it is triggered to discharge, the extremely high osmotic pressure within the nematocyst (140 atmospheres) causes water to rush into the capsule, increasing the hydrostatic pressure and expelling the thread with great force. The barb instantly penetrates the prey, stinging it with a highly toxic protein.


What is the coiled thread like stinger that all cnidarians have called?

nematocyst


What is the difference between nematocyst and spicules?

Nematocysts are on Cnidarians, spicules are in Poriferae


What is the difference between a nematocyst and a cnidocyte?

Nematocysts are the stinging cells and are located inside of the cnidocytes


Does nematocyst move?

Yes. These capsules allow them to fire from the Operculum as a means of self-defense or to immobilize prey.


Where are nematocysts located?

Nematocysts are located within a capsule in the cell. The capsule has a lid that opens when the nematocyst is discharged.


The trigger mechanism of the nematocyst organelle of the stinging cnidocyte cell consists of a and a?

cnidocil ... opeerculum,,, for those Plato users


Does a jellyfish have poison?

Yes."A lance inside the nematocyst pierces the victim's skin, and poisen flows through into the victim."


How did the cnidarians get their name?

The origin of the name cnidarians is from the New Latin: cnida, meaning nematocyst and Greek for knide: meaning, nettle.


How do nematocysts help some animals get food?

Cnidocytes or namatoblasts or cnidoblasts are called stinging cells. These are concentrated around mouth and on tentacles. These help in paralyzing and capturing the prey or killing the enemy. Each cnidocyte acts as a capsule and encloses a nematocyst. The nematocyst is filled with poisonous fluid, hypotoxin, and its anterior end is drawn out into a long hollow thread which may bear spines. On being stimulated, the nematocyst is ejected and its long thread either injects poison into the body of prey, killing or paralyzing it, or coils around it.

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