학술논문
Effects of Ethanol on Neurohumoral Mechanisms for Blood Pressure Regulation in Hemorrhaged Conscious Rats
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- 영문명
- Effects of Ethanol on Neurohumoral Mechanisms for Blood Pressure Regulation in Hemorrhaged Conscious Rats
- 발행기관
- 대한생리학회
- 저자명
- Park, Yoon-Yub Park, Jae-Sik Lee, Won-Jung
- 간행물 정보
- 『대한생리학회지』제29권 제1호, 91~102쪽, 전체 12쪽
- 주제분류
- 의약학 > 의학일반
- 파일형태
- 발행일자
- 1995.06.30
4,240원
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국문 초록
영문 초록
The effects of prolactin and vasopressin on the regulation of amniotic fluid (AF) volume and its Na+ concentration Na+ through the membrane surrounding the AF during increase in AF volume due to fetal urination were studied. About 70% of AF volume was replaced with normal isotonic saline solution. Isotonic saline solution (0.5 ml) containing Censored and LiCl was introduced into each amniotic sac. Vasopressin (25 ng/ml) or prolactin (1 mg/ml) of AF was then injected into experimental amniotic sac. The concentrations of Congored, Li+, and Na+ were measured at 30 and 60 min intervals after injection. Af samples with decreased Censored concentration ([CR]) during the period of 30 - 60 min were analyzed. The percentage change of [Na+] and the rate of Li+ movement during this period were calculated, and the effects of vasopressin and prolactin on them were evaluated. Fellowing results were obtained: 1. The rate of reduction of [CR] in the AF was retarded by vasopressin or prolactin injection. 2. The rate of reduction of [Li+] in the AF was also retarded by vasopressin or prolactin injection. 3. The rate of reduction of [Li+] in the AF was less retarded by vasopressin than that of [CR]. 4. [Na+] changed to approach to the normal level, but this was markedly retarded by prolactin injection. 5. Direction of Li+ movement was correlated with the change in [Na+] but it always moved out of the amniotic sac even when the [Na+] increased in vasopressin injected AF. From the above results, it is suggested that vasopressin in the AF triggers the fetus to urinate, and then the membranes surrounding the AF regulate osmolarity by efflux of Na+. We suggest that prolactin facilitates water outflow across the amniotic membrane during increase in AF volume, in contrast to a constant volume, whereas regulation of [Na+] is partly restricted by prolactin.
목차
해당간행물 수록 논문
- The Effects of Prolactin and Vasopressin on the Regulation of Amniotic Fluid Volume and Its Na+ Concentration through the Membrane Surrounding Amniotic Fluid
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- Inhibitory Effects of Verapamil and TMB-8 on Tonic Contraction Are Accompanied by Inhibition of Phospholipase C Activity in Intact Gastric Smooth Muscle Cells
- Effects of Ethanol on Neurohumoral Mechanisms for Blood Pressure Regulation in Hemorrhaged Conscious Rats
- The Action of Ginkgo Bibloba Extract in the Isolated Rabbit Corpus Cavernosum
- Effects of High Glucose on Na,K-ATPase and Na/glucose Cotransporter Activity in Primary Rabbit Kidney Proximal Tubule Cells
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