EMBRYONIC HEART-RATE OF THE DOMESTIC-FOWL (GALLUS-DOMESTICUS) IN A QUASI-EQUILIBRIUM STATE OF ALTERED AMBIENT-TEMPERATURES

被引：24

作者：

TAZAWA, H ^{[1
]}

YAMAGUCHI, S ^{[1
]}

YAMADA, M ^{[1
]}

DOI, K ^{[1
]}

机构：

[1] YAMAGATA UNIV, SCH MED, DEPT PHYSIOL, YAMAGATA 99023, JAPAN

来源：

COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY A-MOLECULAR & INTEGRATIVE PHYSIOLOGY | 1992年 / 101卷 / 01期

关键词：

D O I：

10.1016/0300-9629(92)90635-4

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

1. The heart rates (f(H)) of 12-day-old embryos (young), 16- and 18-day-old embryos (late) and of 20-day-old embryos (externally pipped eggs, EP) were measured noninvasively at a temperature of 38-degrees-C and after a 5 hr exposure to an ambient temperature (T(a)) within the range 34-46-degrees-C. 2. All embryos survived the 5 hr exposure to T(a) of 42-degrees-C. The lethal T(a) ranged from 44-degrees-C (EP eggs) to 46-degrees-C (young embryos). 3. The temperature coefficient (Q10) of f(H) became smaller than 2 in EP eggs as T(a) was decreased or increased from 38-degrees-C, implying an incipient homeothermic response of f(H).

引用

页码：103 / 108

页数：6

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