A marine cartilaginous fish that can produce electric current is: [2014]a)Pristisb)Torpedoc)Trygond)ScoliodonCorrect answer is option 'B'. Can you explain this answer?

Question

A marine cartilaginous fish that can produce electric current is:   [2014]a)Pristisb)Torpedoc)Trygond)ScoliodonCorrect answer is option 'B'. Can you explain this answer?

Answer

•Torpedo is a marine cartilaginous fish which produces 8-220 volt electric charge (current) depending on species. Their electric organs are modified lateral muscle plates innervatted by carnrial nerves.

Trygon (sting ray) resembles electric ray in many aspects but is devoid of electricity discharging (or producing) organs.

•Scoliodon (dog fish) is known for its great sense of smell. Pristis or common saw fish (also known as carpenters shark) is charactesised by a long, narrow, flattened rostrum lined with sharp transverse teeth to resembles a saw.

Hence the answer is option b

Answer

Torpedo -electric current
trygon-sting ray
scoliodon-dogfish
pristis-saw fish

Answer

B

Answer

< b='' />Torpedo is a marine cartilaginous fish that can produce electric current.

Electric Organ
-------------------------
- The Torpedo is a marine cartilaginous fish belonging to the family Torpedinidae.
- It is commonly known as an electric ray or electric skate.
- The electric organ present in Torpedo fish allows it to generate and discharge electric current.
- This electric organ is an adaptation that helps the fish in hunting, defense, and communication.

Electric Organs in Torpedo fish
---------------------------------------
- The electric organs in Torpedo fish are located on either side of the head, behind the eyes.
- These organs are composed of specialized cells called electrocytes.
- Each electrocyte is capable of generating an electric field.
- The electric organs in Torpedo fish are made up of hundreds of electrocytes stacked together.

Electric Discharge
----------------------------
- When the Torpedo fish wants to generate an electric discharge, it sends signals from its brain to the electric organs.
- This triggers the simultaneous discharge of electric current from all the electrocytes in the electric organs.
- The electric discharge produced by Torpedo fish can reach up to several hundred volts.
- The discharge is used to stun prey, deter predators, and for communication with other individuals of the same species.

Physiological Mechanism
--------------------------------
- The electric discharge produced by Torpedo fish is generated by the flow of ions across the membranes of the electrocytes.
- The electrocytes have a high concentration of sodium ions inside and a high concentration of potassium ions outside.
- When the electric discharge is triggered, the electrocytes rapidly exchange sodium and potassium ions, creating an imbalance in charge.
- This creates a potential difference across the cell membrane, resulting in the generation of electric current.

Conclusion
----------------------
- Torpedo fish is a marine cartilaginous fish that can produce electric current.
- It possesses specialized electric organs composed of electrocytes.
- The electric discharge produced by Torpedo fish is used for hunting, defense, and communication.

Answer

Torpedo,its electic range is from 8 to 220 volt

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