The Effects of Microelectrophoretically Applied Melatonin, Putative Transmitters, Thyroxine and Sex Hormones on the Electrical Activity of Pineal Cells in the Guinea-pig

1981 ◽  
pp. 129-133 ◽  
Author(s):  
P. Semm ◽  
C. Demaine ◽  
L. Vollrath
Keyword(s):  
Guinea Pig ◽  
Electrical Activity ◽  
Sex Hormones

PROGESTERONE CONCENTRATION, INTRALUMINAL PRESSURE AND ELECTRICAL ACTIVITY OF THE GUINEA-PIG UTERUS

1974 ◽  
Vol 61 (2) ◽  
pp. 255-263 ◽  
Author(s):  
D. G. PORTER ◽  
K. YOSHINAGA ◽  
J. FORD
Keyword(s):  
Guinea Pig ◽  
Electrical Activity ◽  
Guinea Pigs ◽  
Intraluminal Pressure ◽  
Progesterone Concentration ◽  
Uterine Muscle ◽  
Progesterone Treatment ◽  
Electrical Activities

SUMMARY The electrical activity of the myometrium and the intra-uterine pressure were recorded by means of suction electrodes and intraluminal balloons respectively from anaesthetized, oestrogen-primed, ovariectomized guinea-pigs treated with progesterone (25 mg, s.c. twice, 16 h apart). No loss of intra-uterine pressure occurred after progesterone treatment and electrical activities in the balloon-containing and intact horns were indistinguishable. Furthermore, the concentration of progesterone in the uteri of these animals was 0·32 ± 0·05 (S.E.M.) μg (balloon-containing horn) and 0·43 ± 0·06 μ/g wet tissue (intact horn). These values greatly exceed the levels found in uteri of pregnant animals (0·07 ± 0·03 μ/g wet tissue). Thus the failure of progesterone to reduce myometrial activity in the guinea-pig is real and is not due to interference from the balloon, or to failure of the steroid to reach the uterine muscle or to lack of oestrogen priming.

EFFECTS OF ESCALATING CONCENTRATIONS OF SEX HORMONES ON ISOLATED PERFUSED GUINEA PIG HEARTS

2007 ◽  
Vol 56 (2) ◽  
pp. e13
Author(s):  
Robert L. Hamlin ◽  
Anusak Kijtawornrat ◽  
Brian Roche ◽  
Jennifer Lolly ◽  
Jay Schmidt
Keyword(s):  
Guinea Pig ◽  
Sex Hormones

The Effects of Thalidomide on the Electrical Activity of the Brain in the Intrauterine Guinea-Pig Foetus

Pharmacology ◽  
1964 ◽  
Vol 11 (2) ◽  
pp. 119-127 ◽  
Author(s):  
R.M. Bergström ◽  
Lea Bergström ◽  
P. Putkonen ◽  
K. Sainio
Keyword(s):  
Guinea Pig ◽  
Electrical Activity ◽  
The Brain
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