Kinetics of phototransduction in retinal rods of the newt Triturus cristatus.
نویسندگان
چکیده
منابع مشابه
Induction and differentiation of an epithelial tumour in the newt (Triturus cristatus).
W A D D I N G T O N (1935) and later Needham (1936) have suggested that the autonomy of tumours originates in a 'morphological escape' of tumour cells from the controlling influence of an individuation field which has locally become weak or has vanished. The persistence and strength of such an individuation field can be seen in its ability to induce its parts to regeneration (Ruben, 1955). This...
متن کاملSex reversal of the newt Triturus cristatus reared at extreme temperatures.
Crested newt larvae were reared at defined temperatures, either from uncleaved eggs or from early feeding larvae, until metamorphosis when sexual differentiation had occurred. Trials at 18-24 degrees C showed a 1:1 sex ratio. A higher temperature trial produced more males than females, including some XX neomales. Lower temperatures resulted in a significant excess of females, including XY neofe...
متن کاملDigit regeneration in the amphibian--Triturus cristatus.
Digit regeneration has been examined in Triturus cristatus. Because of their size, blastemas that form after digit amputation are relatively a lot more suitable for quantitative studies that involve for example the counting of cells in histological sections. They are also very useful for the study of some basic histological aspects of regeneration particularly cartilage formation. This has been...
متن کاملPhototransduction mechanism in retinal rods and cones. The Friedenwald Lecture.
V ision begins in the rod and cone receptors of the retina, where light is absorbed and a neural signal is generated. This signal, in the form of an electrical hyperpolarization of the cell membrane, influences second-order visual neurons by modulating the rate of neurotransmitter (glutamate) release from the synaptic terminal of the photoreceptor. This release is high in the dark and is reduce...
متن کاملThe Occurrence and Possible Significance of Haemoglobin in the Chromosomal Regions of Mature Erythrocyte Nuclei of the Newt Triturus Cristatus Cristatus
Absorption measurements in violet light (lambda 4047 A) of thin sections of mature newt erythrocytes have indicated the presence of a haem compound, probably haemoglobin, within the chromosomal regions of the nucleus. The amount is about 45 per cent of that in the cytoplasm. The possible significance of this nuclear haemoglobin in determining nuclear structure is discussed in terms of the elect...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: The Journal of Physiology
سال: 1989
ISSN: 0022-3751
DOI: 10.1113/jphysiol.1989.sp017873