What's the difference between eyestalk and ommatophore?
Eyestalk
Definition:
(n.) One of the movable peduncles which, in the decapod Crustacea, bear the eyes at the tip.
Example Sentences:
(1) Similar to intact crayfish, animals with an isolated protocerebrum-eyestalk complex, exhibit competent circadian rhythms in the electroretinogram (ERG).
(2) Animals continued to display escape responses after removal of eyestalks and antennae.
(3) NDH is produced rhythmically in the eyestalk neurosecretory complex, perhaps partly under the control of other clock components elsewhere in the CNS.
(4) The experiments were performed on in vitro X-organ sinus gland neurosecretory systems from the eyestalk of the crab Cardisoma carnifex.
(5) Also, glucose uptake from blood serum, not affected by eyestalk extract (P greater than 0.05), was observed after incubation of total hemolymph in the presence of glucose.
(6) Injection of eyestalk extract into both intact and destalked crabs activated all the enzymes.
(7) The 5HT synthesis inhibitor p-chlorophenylalanine (PCPA; 60 micrograms) or the 5HT receptor antagonist cyproheptadine (CPH; 100 micrograms) caused significant rises in serum ecdysteroids in intact, but not in de-eyestalked, crabs; with four injections over 48 hr, a rise was evident at 12 hr, continued through 72 hr, and returned to control levels within 4 days post-treatment.
(8) The second factor accelerates ecdysis in nonregenerating animals and appears to be produced in the eyestalks.
(9) Injection of 3-OH-K to the eyestalk-ablated crayfish delayed the onset of the first molt and lengthened the interval between the first and second molts.
(10) A peptide was isolated and purified from sinus glands of the lobster, Homarus americanus, that was able to decrease circulating titers of ecdysteroids and increase the molt interval of eyestalk-ablated juvenile lobsters.
(11) Eyestalk ablation did not significantly reduce the molt cycle duration of regenerating animals.
(12) The concentration of haemolymph sugar and hyperglycaemic activity of eyestalk extract was higher during the night (0 h through 8 h) than that noted in day time (12 h).
(13) During intermolt cycle of juvenile females, mandibular glands in the Crab, Carcinus maenas L., show a cyclical behavior which is disturbed by eyestalk ablation.
(14) The well-known defense response of a crab (laterus merus display, LMD) was easily evoked in Carcinus mediterraneus by striking the cephalothoraxic protogastric region between the eyestalks.
(15) One located outside the eyestalks extends the molt cycle to accommodate regeneration.
(16) Eyestalk-intact, but not de-eyestalked, crabs (Cancer antennarius) given five injections of 5-hydroxytryptamine (5HT, 750 micrograms per injection) in 48 hr showed significant reductions in hemolymph ecdysteroid titers within the first 12 hr which continued through Hour 72; the effect was reversible (Hours 72-144).
(17) NDH synthesis takes place with a time constant of approximately 3 hr in cultured isolated segments of central nervous system, being highest in the eyestalk.
(18) Different areas of the crustacean central nervous system: brain, eyestalks and thoracic ganglionic mass biosynthesize and metabolize histamine.
(19) We describe here the anatomy and physiology of interneurons that connect the brain with the medullae terminales or other eyestalk ganglia.
(20) NDH activity was determined in the various parts of the central nervous system of the crayfish, being highest in the eyestalk, gradually diminishing away from the eyestalk, with a cephalo-caudal gradient, being lowest in the abdominal ganglia.
Ommatophore
Definition:
Example Sentences:
(1) Most of the sensory cells found in the chemoreceptor of the ommatophore of Helix pomatia are typical bipolar cells.
(2) In the paper are reviewed the author's data on the structure of peripheral nervous system of the body wall, gravitational organs--statocysts, eyes, and organs of distant chemoreception--ommatophors, or posterior head tentacles, of the snails Helix vulgaris and Helix pomatia.