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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.
Spermiogenesis - Spermatogenesis At the end of the meiosis the spermatids appear as simple spherical cells with a centrally located nucleus. Their differentiation into sperm r
about phylum mollsca and its classification
FUNCTION S OF TESTOSTERONE - (a) It stimulates the growth and development of male secondary sex organs like the seminal vesicles, prostate and penis. It also helps to maintain
Of the cell types observed (Paramecium, Euglena, Yeast, Elodea, cheek cells), would any cell "verify" the cell theory? Explain your answer.
ACRODYNAM IC S Division of air in lungs. Measured by spirometer. 1. Tidal Air (T.A.): Quantity of air taken in or given out in a breath 500 cc. 2. Inspiratory Reserv
Explain the life cycle of Water? The water cycle , or hydrologic cycle, is one of the most important processes to living organisms on Earth. Consider the following facts:
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Determine the Food Sources of Manganese? The food sources of manganese along with their content are tabulated in Table. Here, you can see that whole cereals, nuts, leafy vegeta
Define Use of Isotopically Labelled Nutrients? Nutrient Turnover Radioactive labelled nutrients are used to know the total body pool and the compartment in which it is stored.
explain the different types of symmetry in metazoans.
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