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12 years ago
Describe the classic steps for identifying an endocrine gland. Are these steps practical for identifying the sources of all the hormones we know of today? Explain.
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12 years ago
1.  Remove the suspected gland, and observe the animal.
2.  Restore the gland or administer a gland extract, and observe the animal.
3.  Add a gland or gland extract to a normal animal, and observe the animal for excessive response.
4.  Purify gland extracts and isolate the substance. There are many hormones that are secreted from cells that are not part of a discrete gland and therefore not removable without causing problems beyond loss of the hormone.
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