HR has various meanings in the Science category. Discover the full forms, definitions, and usage contexts of HR in Science.
A hormone receptor is a receptor molecule that binds to a specific hormone. Receptors for peptide hormones tend to be cell surface receptors (built into the plasma membrane of cells, thus trans membrane), whereas receptors for steroid hormones are usually found within the cytoplasm (nuclear receptors). Upon hormone binding, the receptor can initiate multiple signaling pathways which ultimately lead to changes in the behavior of the target cells.
ScienceThe ability of a plant to survive, grow and complete its normal life cycle after exposure to the application rate typically used in agricultural systems. The resistance may be due to natural processes or by genetic engineering.
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