
Autocoids and Histamine

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Biology
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University
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Medium
saba shaikh
Used 3+ times
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26 questions
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1.
FLASHCARD QUESTION
Front
What is the origin of the word 'Autocoid'?
Back
Derived from Greek: 'Autos' meaning self and 'Akos' meaning healing substance or remedy.
2.
FLASHCARD QUESTION
Front
What are autocoids?
Back
Diverse substances produced by various cells in the body with intense biological activity.
3.
FLASHCARD QUESTION
Front
What is a unique attribute of autocoids?
Back
They act locally at the site of synthesis and release, often referred to as local hormones.
4.
FLASHCARD QUESTION
Front
How do autocoids differ from hormones?
Back
Autocoids act locally and have short-lived effects, while hormones are released into the bloodstream and act on distant organs with longer-lasting effects.
5.
FLASHCARD QUESTION
Front
Name the five classical types of autacoids.
Back
1. Amine autacoids (e.g., Histamine, Serotonin) 2. Lipid-derived autacoids (e.g., Prostaglandins, Leukotrienes) 3. Peptide autacoids (e.g., Bradykinin, Angiotensin) 4. Cytokines (e.g., interleukins, TNF-α) 5. Several peptides (e.g., gastrin, somatostatin).
6.
FLASHCARD QUESTION
Front
Where is histamine primarily located in the body?
Back
Histamine is mostly found in mast cells, particularly in the skin, gastric and intestinal mucosa, lungs, liver, and placenta.
7.
FLASHCARD QUESTION
Front
What is the difference between mast cell histamine and non-mast cell histamine?
Back
Mast cell histamine is released during allergic reactions causing symptoms like swelling and itching, while non-mast cell histamine is involved in normal body functions like stomach acid secretion.
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