Morphology and development of oocyte and follicle resorption bodies in the Lubber grasshopper, Romalea microptera (Beauvois)
نویسندگان
چکیده
منابع مشابه
Exposure to Exogenous Enkephalins Disrupts Reproductive Development in the Eastern Lubber Grasshopper, Romalea microptera (Insecta: Orthoptera)
Enkephalins play a major role in reproductive physiology in crustaceans; however their role in reproductive development in insects is largely unknown. We investigated the effect of exposure to exogenous leucine-enkephalin (Leu-Enk), methionine-enkephalin (Met-Enk), and the opioid antagonist naloxone on gonad development in the Eastern lubber grasshopper, Romalea microptera. Injection of either ...
متن کاملPrimary structure of an analog of crustacean pigment-dispersing hormone from the lubber grasshopper Romalea microptera.
An octadecapeptide capable of inducing pigment dispersion in the chromatophores of the fiddler crab Uca pugilator has been isolated from lyophilized heads of the lubber grasshopper Romalea microptera. This pigment-dispersing factor (PDF) was purified by gel filtration, ion-exchange chromatography, partition chromatography, and reversed-phase high performance liquid chromatography. Automated gas...
متن کاملExercise 3: Internal Anatomy of the Lubber Grasshopper, Romalea
Laboratory Specimens The eastern lubber grasshopper, Romalea guttata, is often used as the introduction to insect anatomy. Romalea is a large insect, reaching 50 to 75 mm in length, and is easily dissected. It is a good example of general, relatively unspecialized insect anatomy. Romalea is best studied using anesthetized living, or freshly sacrificed specimens. Preserved animals are much less ...
متن کاملthe survey of the virtual higher education in iran and the ways of its development and improvement
این پژوهش با هدف "بررسی وضعیت موجود آموزش عالی مجازی در ایران و راههای توسعه و ارتقای آن " و با روش توصیفی-تحلیلی و پیمایشی صورت پذیرفته است. بررسی اسنادو مدارک موجود در زمینه آموزش مجازی نشان داد تعداد دانشجویان و مقاطع تحصیلی و رشته محل های دوره های الکترونیکی چندان مطلوب نبوده و از نظر کیفی نیز وضعیت شاخص خدمات آموزشی اساتید و وضعیت شبکه اینترنت در محیط آموزش مجازی نامطلوب است.
The Mechanism of Dual Responsiveness in Muscle Fibers of the Grasshopper Romalea microptera
Dually innervated Romalea muscle fibers which respond differently to stimulation of their fast and slow axons are excited by intracellularly applied depolarizing stimuli. The responses, though spike-like in appearance, are graded in amplitude depending upon the strength of the stimuli and do not exceed about 30 mv. in height. In other respects, however, these graded responses possess properties...
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: Journal of Orthoptera Research
سال: 2001
ISSN: 1082-6467,1937-2426
DOI: 10.1665/1082-6467(2001)010[0039:madooa]2.0.co;2