Zona

In reference to embryo development - the dividing mass of cells is initially held within a membranous structure - zona pellucida - that is eventully breached shortly before implantation. It has more than a mechnical function as it's involved in sperm binding.

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1: Zona pellucida is the gelatinous extracellular matrix that surrounds the egg, that the sperm has to encounter. The zona pellucida contains 3 glycoproteins, ZP1,2,and 3, which are important in the recognition of the sperm. ...

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Guessing it will not breach the egg wall. Chemoattractants and sperm surface proteins designed to bind receptors on the zona pellucida/initiate the acrosomal reaction are species-specific.

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... on the afferent arteriole entering the glomerular capsule mainly * hormonal through many different hormones secreted from adrenal medulla and zona glomerulosa in the adrenal cortex and affect mainly efferent areriole and is accompanied by Na and K retension , Also ADH from supra optic and ...

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... I need atleast five labels, and I also have a few questions to ask. First, I can identify the ovum itself, the cytoplasm of the ovum, and the Zona Pellucida in the picture. That makes three. I cannot seem to find two more things to identify, and I've had difficulty in finding resources on ...

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