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Signal transduction occurs when an extracellular signaling molecule activates a cell surface receptor. In words, this receptor change intracellular molecules changes a response. There are two levels in this procedure: the signaling molecule activates a particular receptor protein on the cell membrane. A 2nd messenger transfers the signal into the cell and eliciting a physiological response. In either level the signal can be amplified. Whereas, one signalling molecule can cause several responses. Gene activations and metabolism alterations are instances of cellular responses to extracellular stimulation which requires signal transduction.
Interferons are small glycoproteins formed by virus-infected cells that inhibit viral infection. They are heterogeneous. Gamma interferons induce MHC class II antigens in macrophag
Vitamin C (Ascorbic acid) Vitamin C, ascorbic acid is also called anti-scorbutic vitamin. Ascorbic acid occurs as white crystals or white crystalline powder without odour and o
Zanamivir (Relenza) Started within 2 days after onset of symptoms, this orally inhaled neuraminidase inhibitor can shorten the duration of illness and may decrease the incide
The technical term used for the androecium in a flower of China rose (Hibiscus rosasinensis) is: 1. Monadelphous 2. Diadelphous 3. Polyandrous 4. Polyadelphous
Taeniasis Taeniasis is a zoonotic disease caused by specific cestodes. The two parasites of major importance are Taenia saginata and T. solium. Both in their adult forms, are
Prostaglandins and the structurally associated molecules prostacyclins, leukotrienes and thromboxanes, are called as eicosanoids because they having 20 carbon atoms. These hormones
In the time of Darwin the results of Mendel's research on biological inheritance had not been published, Genetics was not yet developed, neither DNA nor the concept of genetic muta
Improper Implant type in Improper Bone Type In routine sites with good quality bone, the clinician should prefer implants without any superadded HA coatings and avoiding their
How Proteins can be Classified? I. Shape and size: fibrous proteins and globular proteins. Fibrous proteins play structural roles in organisms. Globular proteins consist of lo
Implementation of Nursing Care Isolate the Child: When the child is admitted with suspected meningitis, the nurse has to take care that child's isolation is essential to p
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