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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.
What would occur to the successive trophic levels in the pyramid of energy if the rate of reproduction of phytoplankton was slowed down? Suggest two factors, which could cause l
In 1798, British economist and demographer Thomas Robert Malthus, published his' essay on population' in which he stated that: 1. Population increases in a geometric rat
Breifly describe the Menstrual Cycle? Each month during a female's reproductive years, the hypothalamus secretes a hormone that stimulates the anterior lobe of the pituitary gl
Regeneration in Hydra You previously know that the Hydra has spectacular regenerative ability. The hydra is a small tubular, two layered fresh water animal computing 20mm in
Q. What is the function of the immune system? The immune system performs specific defense against agents the antigens that are harmful to the body or foreign. Exogenous anti
Q. Is the cell division happening during the entire cell cycle? What is the interphase? Cell division properly occurs throughout the mitotic phase of the cell cycle. During int
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How Delayed Complementary Feeding Cause PEM? The mothers from poorer socioeconomic groups where PEM is more prevalent, delayed introduction of complementary foods (foods in add
Diagnosis Clinical signs: In most of the cases in initial stages like bacterial infections there is leucocytosis with neutrophilia, which at later stages of the disease may c
Occurrence of Biotin Biotin occurs in nature very likely in all living cells, although usually in minute concentrations. In animal organs and in yeast, biotin is mainly cont
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