作者: Mary J. Packard , Nancy B. Clark
DOI: 10.1086/PHYSZOOL.69.2.30164194
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摘要: Embryos of oviparous and viviparous lepidosaurians, chelonians, archosaurians must maintain calcium homeostasis while mobilizing large quantities from the yolk, eggshell, or maternal circulation. The same calcium-regulating hormones that control status adults are assumed to embryos as well, but target organs for regulation may be different in adults. yolk sac, which mediates uptake (and deposition into archosaurians), chorioallantois, release eggshell transport shell vasculature species, chorioallantoic placenta, maternal-fetal transfer potential targets (calcitonin, parathyroid hormone, calcitriol) during embryogenesis. However, role these mediating e...