Abstract:
:The use of hormone replacement to support limb regeneration in hypophysectomized newts has been the subject of many investigations. Growth hormone, as well as prolactin (PL) in combination with exogenously supplied thyroxine, have all been shown to he effective. However, the bovine growth hormone used to support limb regeneration was contaminated by prolactin and thyroidstimulating hormone (TSH). The present investigation evaluates the significance of (1) prolactin contamination and (2) endogenous thyroxine synthesis resulting from TSH contamination on limb regeneration in hypophysectomized newts. The effect of supplying exogenous thyroxine was also evaluated. Our studies showed that when hypophysectomized newts were injected with contamination levels of PL and TSH, regeneration occurred, suggesting that the newt's thyroid synthesized sufficient thyroxine to support a prolactin-thyroxine synergism. The endogenous thyroxine was synthesized by thyroid glands that were indistinguishable from those of saline-injected, hypophysectomized controls.
journal_name
J Morpholjournal_title
Journal of morphologyauthors
Hessler AC,Landesman Rdoi
10.1002/jmor.1051670109subject
Has Abstractpub_date
1981-01-01 00:00:00pages
103-108issue
1eissn
0362-2525issn
1097-4687journal_volume
167pub_type
杂志文章abstract::The study of the arterial arches of Bipes, the only amphisbaenian with forelimbs, resolves the problem of the interpretation of the structure of the arterial arches in other forms of this group of squamate reptiles. In Bipes, as in turtles, the subclavian and common carotid arteries originate from a brachiocephalic tr...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1051840202
更新日期:1985-05-01 00:00:00
abstract::The function of the septomaxilla of nonmammalian synapsids has long been problematic. Distinctive features of this bone, including a prominent intranarial process and a septomaxillary canal and foramen, are characteristic of pelycosaurs and nonmammalian therapsids, but are lost in their mammalian descendants. Numerous...
journal_title:Journal of morphology
pub_type: 杂志文章,评审
doi:10.1002/1097-4687(200007)245:1<29::AID-JMOR3>3.0.C
更新日期:2000-07-01 00:00:00
abstract::In viviparous, teleost fish, with postfertilization maternal nutrient provisioning, embryonic structures that facilitate maternal-fetal nutrient transfer are predicted to be present. For the family Poeciliidae, only a handful of morphological studies have explored these embryonic specializations. Here, we present a co...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.20745
更新日期:2017-12-01 00:00:00
abstract::The development of two of the cranial lateral line canals is described in the cichlid, Archocentrus nigrofasciatus. Four stages of canal morphogenesis are defined based on histological analysis of the supraorbital and mandibular canals. "Canal enclosure" and "canal ossification" are defined as two discrete stages in l...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.10045
更新日期:2003-01-01 00:00:00
abstract::Adult female white-footed mice, Peromyscus leucopus, were exposed to long (LP) or short (SP) photoperiods for 6 weeks (experiment I). Another group of animals was kept for 6 weeks in SP, then injected SC with 30 micrograms prolactin twice daily for 2, 3, 4, or 6 days (experiment II). Ovaries from the mice in both expe...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1051760211
更新日期:1983-05-01 00:00:00
abstract::The marine priapulid Priapulus caudatus has a voluminous body cavity filled with a blood-like fluid containing erythrocytes and leucocytes (amoebocytes). The hematocrit of animals weighing 0.5-14 gm was 2-10%. The erythrocytes contain a hemerythrin blood pigment. The structure of the coelomocytes was studied by light ...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1051400309
更新日期:1973-07-01 00:00:00
abstract::Tooth development and replacement in fetal and adult viviparous caecilians (Amphibia: Gymnophiona) are described and analyzed according to current theories of tooth succession. The fetal dentition differs from that of the adult in morphology, position, and function. Teeth are used by fetuses to scrape the oviducal epi...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1051480104
更新日期:1976-01-01 00:00:00
abstract::The king-of-the-salmon, Trachipterus altivelis (Lampriformes), has an unusual set of oral jaws which allow it the ability to protrude the entire upper jaw, containing the premaxilla and the maxilla bones, to extreme distances. Here, we provide a short description of the cranial anatomy and mechanism of jaw protrusion ...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.21071
更新日期:2019-12-01 00:00:00
abstract::Over the past few decades, geometric morphometric methods have become increasingly popular and powerful tools to describe morphological data while over the same period artificial neural networks have had a similar rise in the classification of specimens to preconceived groups. However, there has been little research i...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.20626
更新日期:2017-01-01 00:00:00
abstract::External features of the egg, developing embryo, and first instar nymph of Kamimuria tibialis are described. The embryonic development from the germ disc to the full-grown embryo is divided into 12 stages. The saclike embryonic rudiment is formed by the bending and folding of the germ disc. The embryo first elongates ...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1051830308
更新日期:1985-03-01 00:00:00
abstract::Reproduction was studied in a South Carolina population of the paedomorphic salamander Siren intermedia with emphasis on anatomy of the female oviduct. The oviduct forms 67-79% of the snout-vent length in this elongate species and can be divided into three portions. The atrium, 7-13% of oviducal length, is the narrow ...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/(SICI)1097-4687(199603)227:3<335::AID-JMOR
更新日期:1996-03-01 00:00:00
abstract::The strongly modified mode of development of the small and brooding galeommatoid bivalve Lasaea adansonii (Gmelin, 1791) [syn. Lasaea rubra (Montagu, 1803)] has been studied by means of transmission and scanning electron microscopy and by fluorescent staining of the muscular system and of two neurotracers, FMRFamide a...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.10623
更新日期:2008-06-01 00:00:00
abstract::Branchial food traps are regions of specialized secretory tissue in the tadpole pharynx, where suspended food particles are trapped in mucus. Light and scanning electron microscopy were used to study branchial food traps from larvae of ten anuran families (36 species). Most anuran larvae from "advanced" (suborder Neob...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1051590307
更新日期:1979-03-01 00:00:00
abstract::The lungs of the New Caldeonian gecko Rhacodactylus leachianus were examined by means of gross dissection and light and electron microscopy. This tropical species, which is the largest living gecko, possesses two simple, single-chambered lungs. Right and left lungs are of similar size and shape. The lung volume (27.2 ...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1051990104
更新日期:1989-01-01 00:00:00
abstract::Newly metamorphosed Kenyan reed frogs, Hyperolius viridiflavus ferniquei, are able to regenerate amputated digits. The terminal digital pad is also completely reformed. Differentiation of the regenerating digital pad was studied by scanning electron microscopy. External differentiation of the digital pad began late in...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1051530305
更新日期:1977-09-01 00:00:00
abstract::The posterior half of the channel catfish intestine has a similar histological organization to that of other teleost fishes. This region is organized into a muscosa, a submucosa, a double layered muscularis and a serosa. A "stratum compactum" of dense connective tissue was confirmed for the submucosa. In its histology...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1051450405
更新日期:1975-04-01 00:00:00
abstract::Whole body studies of Plotosus tandanus revealed that ampullary pores occur over the entire body of the fish, but are in higher concentrations in the head region. These pores give rise to a short canal (50-60 microm) produced by columnar epithelial cells bound together by tight junctions and desmosomes. At the junctio...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.10063
更新日期:2003-02-01 00:00:00
abstract::Tadpoles of several different genera were fed graded suspensions of uniform polystyrene particles to determine the lower size limit of particles that could be ingested. Certain tadpoles can extract suspended particles as small as 0.126 μ in diameter from the water. In terms of particle size, this is an efficiency comp...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1051370303
更新日期:1972-07-01 00:00:00
abstract::The omphalallantoic placenta is a complex organ that is unique to viviparous squamates. Using transmission EM and light microscopy, we examined this placenta in garter snakes in order to understand its structural organization and functional capabilities. The omphalallantoic placenta is formed from the uterine lining a...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.10084
更新日期:2003-05-01 00:00:00
abstract::To date, the phylum Cycliophora comprises only one described extant species of acoelomate marine invertebrates, Symbion pandora. Adult specimens live commensally on the mouthparts of the Norwegian lobster, Nephrops norvegicus. Its complicated life cycle includes an asexually produced Pandora larva and a sexually produ...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.10354
更新日期:2005-08-01 00:00:00
abstract::The egg tooth of squamates evolved to facilitate hatching from mineralized eggshells. Squamate reptiles can assist their hatching with a single unpaired egg tooth (unidentates) or double egg teeth (geckos and dibamids). Egg tooth ontogeny in two gekkotan species, the leopard gecko Eublepharis macularius and the mourni...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.21249
更新日期:2020-10-01 00:00:00
abstract::The tectorial structures of the inner ear of the proteid salamander Proteus anguinus were studied with transmission and scanning electron microscopy in order to analyze the ultrastructure of the otoconial membranes and otoconial masses of the maculae and the tectorial membrane of the papilla amphibiorum. Both otoconia...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1052010106
更新日期:1989-07-01 00:00:00
abstract::Many studies in the genus Poecilia have focused on reproductive and genetic characteristics of Poecilia formosa, the Amazon molly, and its sympatric species P. latipinna and P. mexicana. The research literature of Poecilia dentition has been limited to general tooth morphology. Essentially absent are comparative analy...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/(SICI)1097-4687(199903)239:3<271::AID-JMOR
更新日期:1999-03-01 00:00:00
abstract::The structure of the thumus in adult specimens of a marine teleost, the cling fish Sicyases sanguineus, has been studied by light and transmission electron microscopy. Most cling fishes have an outer thymus located beneath the opercular epithelium. A few of them, however, have a large inner thymus besides a poorly dev...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1051770103
更新日期:1983-07-01 00:00:00
abstract::The morphometry, histochemistry, and biomechanical relationships of rectus capitis muscles were examined in adult cats. This family of muscles contained six members on the dorsal, ventral, and lateral aspects of the upper cervical vertebral column. Three dorsal muscles (rectus capitis posterior major, medius, and mino...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1052160107
更新日期:1993-04-01 00:00:00
abstract::Postembryonic skeletal ontogeny of the pelobatid frog Scaphiopus intermontanus is described based on a developmental series of cleared-and-stained, whole-mount specimens. The focus is on laboratory-reared individuals fed a herbivorous diet as larvae. Although there is variation in the timing of ossification of individ...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/(SICI)1097-4687(199811)238:2<179::AID-JMOR
更新日期:1998-11-01 00:00:00
abstract::The light microscopic analysis of serial sections of the subcommissural organ (SCO) of the rainbow trout (Salmo gairdneri) shows that the form of the groove-like (in cross section) organ varies over its total length. Its rostral origin is a tunnel-like structure anterior to the orifice of the hollow pineal stalk. The ...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1051960307
更新日期:1988-06-01 00:00:00
abstract::Mengenillidae is a small, basal family of Strepsiptera, mainly characterized by free-living females in contrast to the endoparasitic females of Stylopidia. Here, we describe external and internal structures of the female abdomen of Eoxenos laboulbenei (Mengenillidae). The external morphology was examined and documente...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.20981
更新日期:2019-05-01 00:00:00
abstract::Amphisabenia is a group of squamates adapted for a fossorial lifestyle. The skull is the animal's the main digging tool, and can present one of four principal shapes. The shovel-headed shape is considered to be the most specialized for digging. The South American genus Leposternon presents a shovel-headed morphotype, ...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.20899
更新日期:2018-11-01 00:00:00
abstract::Changes in body morphology during growth and reproduction in the hydromedusa Eleutheria dichotoma are described in terms of variations in eight different characters: umbrella diameter, total surface area, tentacle area, umbrella area, tentacle knob diameter, number of embryos, and diameter and area of buds. Sexually (...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1052000304
更新日期:1989-06-01 00:00:00