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z-Part 2
UCF
12
Physiology
Undergraduate 3
04/28/2009

Additional Physiology Flashcards

 


 

Cards

Term
Parathyroid hormone (PTH)
Definition
synthesized and secreted by the chief cells of the parathyroid glands.
Term
Alpha cells
Definition
located in the outer rim of islet, secrete glucagon
Term
Beta cells
Definition
located in the central part of the islet, secrete insulin.
Term
Delta cells
Definition
are intermixed and secrete somatostatin and gastrin.
Term
Glucagon
Definition
increases the blood glucose concentration.
It increases glycogenolysis and prevents recycling of glucose into glycogen
It increases gluconeogenesis
It increases blood fatty acid and ketoacid concentration.
It increases lipolysis,
Glucagon increases urea Production
Term
insulin
Definition
increases glucose uptake, promotes glycogenesis, decreases gluconeogenesis, decreases blood fatty acid and ketoacid concentrations, insulin decreases blood K+ concentration.
Term
Somatostatin
Definition
Effect – prolong digestive window for nutrient assimilation into blood and decreases nutrient utilization
Term
Pineal Gland
Definition
Day/Night, Sleep cycles, Melatonin.
Term
Gonads and placenta
Definition
Estrogen, Progesterone , Testosterone, hCG
Term
Prostaglandins
Definition
arachidonic acid is converted by the enzyme cyclooxygenase into a prostaglandin.
-PGI2, antiplatelet aggregation, vasodilation -PGE2, smooth muscle relaxation, vasodilation -PGF2alpha, smooth muscle contraction, vasoconstriction -TXA2 (thromboxane A2), platelet aggregation, vasoconstriction
Term
leukotrienes
Definition
Arachidonic acid is converted by the enzyme lipoxygenase into leukotrienes which are largely responsible for the symptoms of asthma. -Inflammation -Bronchoconstriction -Vasoconstriction
Term
Inhibitors of Prostaglandins synthesis
Definition
Nonsteroidal anti-inflammatory drugs (NSAIDs) Indomethacin Ibuprofen These drugs produce their effects because they specifically inhibit the cyclooxygenase enzyme that is needed for prostaglandin synthesis.
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