Temperature and pH/CO2 modulate respiratory activity in the isolated brainstem of the bullfrog (Rana catesbeiana)

2002 ◽  
Vol 132 (2) ◽  
pp. 477-487 ◽  
Author(s):  
Rey D Morales ◽  
Michael S Hedrick
Keyword(s):  
Rana Catesbeiana ◽  
Respiratory Activity ◽  
Isolated Brainstem

Effects of Halothane on Respiratory Activity in the Isolated Brainstem-Spinal Cord of the Newborn Rat

1994 ◽  
Vol 81 (SUPPLEMENT) ◽  
pp. A1407
Author(s):  
H. Otsuka ◽  
S. G. E. Lindabl ◽  
H. Lagercrantz ◽  
Y. Yamamoto
Keyword(s):  
Spinal Cord ◽  
Respiratory Activity ◽  
Newborn Rat ◽  
Isolated Brainstem

scholarly journals Respiratory activity in the facial nucleus in an in vitro brainstem of tadpole, Rana catesbeiana.

1996 ◽  
Vol 492 (2) ◽  
pp. 529-544 ◽  
Author(s):  
Liao G-S ◽  
L Kubin ◽  
R J Galante ◽  
A P Fishman ◽  
A I Pack
Keyword(s):  
Rana Catesbeiana ◽  
Respiratory Activity ◽  
Facial Nucleus

Vesicular system associated with spermiogenesis of bullfrog

1987 ◽  
Vol 45 ◽  
pp. 818-819
Author(s):  
K. C. Liu ◽  
S. F. Tsay
Keyword(s):  
Electron Microscopy ◽  
Microscopic Study ◽  
Electron Microscopic Study ◽  
Reproductive System ◽  
Seminiferous Tubule ◽  
Rana Catesbeiana ◽  
Routine Procedure ◽  
Electron Microscopic ◽  
Twisted Tubules ◽  
Electron Lucent

In the histologic and electron microscopic study of the male reproductive system of bullfrog, Rana catesbeiana, a vesicular system associated with spermiogenesis was observed. It appeared in the lumenal space of the seminiferous tubule (Fig. 1), in the heads of spermatids (Fig. 2), associated with the chromatins of the spermatid (Fig. 4). As deduced from sections, this vesicular system consisted of vesicles of various size or a large group of waving and twisted tubules (Fig. 3), After routine procedure of treatment for electron microscopy, the lumens of both of the vesicles and tubules were electron lucent.In human, vesicles and vesicular system associated with reproductive cell and tissue were reported. In abnormal spermiogenesis, flower-like body, actually vesicles, and giant vesicle associated with the head of spermatid were observed. In both cases the number of vesicle was limited from a single one to a few.

Serotonin elicits long-lasting enhancement of rhythmic respiratory activity in turtle brain stems in vitro

2001 ◽  
Vol 91 (6) ◽  
pp. 2703-2712 ◽  
Author(s):  
Stephen M. Johnson ◽  
Julia E. R. Wilkerson ◽  
Daniel R. Henderson ◽  
Michael R. Wenninger ◽  
Gordon S. Mitchell
Keyword(s):  
Brain Stem ◽  
Respiratory Activity ◽  
Dependent Manner ◽  
Frequency Increase ◽  
Burst Frequency ◽  
Bath Application ◽  
Burst Amplitude ◽  
Dose Dependent ◽  
The Brain

Brain stem preparations from adult turtles were used to determine how bath-applied serotonin (5-HT) alters respiration-related hypoglossal activity in a mature vertebrate. 5-HT (5–20 μM) reversibly decreased integrated burst amplitude by ∼45% ( P < 0.05); burst frequency decreased in a dose-dependent manner with 20 μM abolishing bursts in 9 of 13 preparations ( P < 0.05). These 5-HT-dependent effects were mimicked by application of a 5-HT1A agonist, but not a 5-HT1B agonist, and were abolished by the broad-spectrum 5-HT antagonist, methiothepin. During 5-HT (20 μM) washout, frequency rebounded to levels above the original baseline for 40 min ( P < 0.05) and remained above baseline for 2 h. A 5-HT3 antagonist (tropesitron) blocked the post-5-HT rebound and persistent frequency increase. A 5-HT3 agonist (phenylbiguanide) increased frequency during and after bath application ( P < 0.05). When phenylbiguanide was applied to the brain stem of brain stem/spinal cord preparations, there was a persistent frequency increase ( P < 0.05), but neither spinal-expiratory nor -inspiratory burst amplitude were altered. The 5-HT3receptor-dependent persistent frequency increase represents a unique model of plasticity in vertebrate rhythm generation.

Detection of Ranavirus by PCR and in situ hybridization in the American bullfrog (Rana catesbeiana) in Taiwan

Aquaculture ◽  
2021 ◽  
pp. 736955
Author(s):  
Chia-Yu Hsieh ◽  
Tirawat Rairat ◽  
Chi-Chung Chou
Keyword(s):  
In Situ Hybridization ◽  
Rana Catesbeiana ◽  
American Bullfrog
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