Q:

What is a pithed frog?

A:

Quick Answer

Pithed frogs have undergone the pithing procedure, which involves a needle inserted through the foramen magnum into the cranial cavity. Pithing mechanically causes disruptions within the frog's brain, and it is an approved euthanasia method for amphibians.

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Full Answer

Pithing a frog is performed in scientific experiments concerning frog reflexes, and a second step, "double pithing," involves destroying the spinal cord, again testing behavior reflexes. The scientific reasoning behind pithing a frog is to determine which behaviors require the spinal cord and brain working together, which behaviors require the spinal cord only or brain only, and which behaviors require neither. Frogs should be cleaned prior to pithing.

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Related Questions

  • Q:

    How does a frog move around?

    A:

    Like most amphibians, frogs move around by walking or running, but most frogs will hop or leap as much as 30 times the length of their own bodies. Tree frogs are excellent climbers with sticky toe pads that allow them to even climb up smooth surfaces like glass.

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  • Q:

    How far can a frog jump?

    A:

    Tree frogs can jump 7 feet, which is 50 times the length of their body. Many other frogs can jump at least 20 times their own length. However, some frogs have short hind legs and hop only short distances.

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  • Q:

    How does a frog close its eyes?

    A:

    Even when they sleep, frogs do not close their eyes. Frogs do, however, have eyelids that blink to protect their eyes from dirty residue and preserve moisture. Frogs also have a third eyelid, called the nictitating eyelid, that facilitates a clear view when swimming underwater or on land.

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  • Q:

    What is the gullet in a frog?

    A:

    A frog's gullet is its throat or esophagus; this is the passage from the mouth to the digestive system. If a frog's digestive process is seen as a series of steps, passage of food from the mouth to the gullet can be seen as the second step in digestion.

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