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GarryVolchara [31]
2 years ago
5

Chemical messengers that influence the activity of the same cell that releases them are __________ chemical messengers, while ch

emical messengers that influence the activity of another cell are ___________ chemical messengers.
Biology
1 answer:
il63 [147K]2 years ago
5 0
Autocrine, and paracrine
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   Periodic episodes of extreme pain, called pain crises, are a major symptom of sickle cell anemia. Pain develops when sickle-shaped red blood cells block blood flow through tiny blood vessels to your chest, abdomen and joints. The pain varies in intensity and can last for a few hours to a few days. Some people have only a few pain crises a year. Others have a dozen or more a year. A severe pain crisis requires a hospital stay.

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