| 词汇 | sea-urchin |
| 释义 | sea urchin noun[ C ] uk /ˈsiː ˌɜː.tʃɪn/ us /ˈsiː ˌɝː.tʃɪn/ a small sea creature that lives in water that is not very deep, has a round shell covered with sharp points like needles, and has flesh that can be eaten海胆 erry Monkman/Nature Picture Library/Nature Picture Library/GettyImages Sea creatures abalone amphipod anemone barnacle barrier reef cowrie crab cray crayfish crustacean littleneck clam lobster marron mollusc mussel shipworm shrimp snow crab soft-shell clam squid Examples of sea urchinsea urchin Proteolysis of the major yolk glycoproteins is regulated by acidification of the yolk platelets in seaurchin embryos. In animal systems, studies on the activation of seaurchin and clam eggs have also found changes in enzyme activity and location. Localisation of fluorescently labelled calmodulin in living seaurchin eggs during early development. Changing localizations of site-specific surface antiperhaps sequential patterns of gene expression during gens during seaurchin spermiogenesis. The seaurchin egg is a model for such studies. A localized zone of increased conductance progresses over the surface of the seaurchin egg during fertilization. For example, in seaurchin oocytes, calciuminduced cortical granule exocytosis leads to the formation of a zygote with a mosaic plasma membrane. Characteristics of individual repetitive sequence families in the seaurchin genome studied with cloned repeats. Localization and possible role of molecules acetylcholinesterase in seaurchin embryos. Good candidates may be the yolk platelets, acidic vesicles and pigment granules, all of which are present in seaurchin eggs. Ligand-dependent stimulation of introduced mammalian brain receptors alters spicule symmetry and other morphogenetic events in seaurchin embryos. Experimental separation of pronuclei in fertilised seaurchin eggs: chromosomes do not organise a spindle in the absence of centrosomes. Redundant mechanisms of calcium-induced calcium release underlying calcium waves during fertilization of seaurchin eggs. Microinjection of inositol triphosphate activates seaurchin eggs. Microtubules are required for completion of cytokinesis in seaurchin eggs. See all examples of sea urchin These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. |
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