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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.
In the above sections we discussed in detail the fossil record of primates in general and more particularly those of apes and the humans. Despite the fact that in recent years a nu
KINDS OF GROWTH - 1 . AUXETIC GROWTH - Body grows by enlargement of its cells without increase in number of cells. eg. Nematodes, rotifers, tunicates. Growth of b
Explain the Mendel's Laws in genetics? Based on the results of his experiments, Mendel proposed three laws regarding the inheritance of traits: the Law of Segregation, the Law
Explain the Chemotherapeautic rinses Chemotherapeautic rinses: The use of 0.12 per cent chlorhexidine has been proven to be of therapeutic significance in maintaining period
Some of the situations that concern ethical decisions in nutrition care are as follows: Difficulty of adequate nutritional support of malnourished patients, a) A problem
PULSE Pulse frequency and heart rate are identical i.e. 72. It can be felt in superficial arteries as in wrist (radial artery [thumb] and ulner artery of brachial art.),
What is the difference between essential and natural amino acids? Ans) Significant amino acids are those that the organism is not able to synthesize and that require to be inges
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URINIFEROU S TUBULE - Unit of kidney. 3-5 cm. long (30 mm). Total length of nephrons is 65 km. A tubule consists of - 1 . Malpighian capsule (
Q. What is the estimated percentage (in mass) of water in the human body? Is this percentage expected to be larger in the adult or in the old individual? Approximately 65% of t
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