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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.
Q. What is Pulmonary Venous Congestion ? In pulmonary venous hypertension, the earliest change is an increase in calibre of the upper lobe vessels. If the upper lobe veins meas
Explain in detail about working of heart Heart has four chambers. Two upper chambers are called atria. Two muscular lower chambers are called ventricles. The right and left
THEOR Y OF EPIGENESIS - It was propounded by C. F. Wolff and supported by Von Baer. According to it, the egg contains the substances which are required in the formation
Explain Prophylaxis with antimicrobial Prophylaxis with antimicrobials has decreased the incidence of surgical site infection after head and neck operations that involve an inc
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Gene repressor proteins which inhibit the transcription of particular genes in eukaryotes also exist. They may act by binding either to control parts within the promoter region nea
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Nuclear endosperm in angiosperm.
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