Physiological Mechanism of Nematocyst Responses in Sea-Anemone. VI
نویسندگان
چکیده
منابع مشابه
Light influence on nematocyst firing in the Sea anemone Haliplanella luciae
Nematocytes, the cnidarians stinging cells, discharge nematocysts into prey to capture them. As nematocysts are expensive, the discharge is tightly regulated and occurs after proper chemical and mechanical stimulation. Here, I present evidence for nematocytes photosensitivity. I found that light decreases the propensity for nematocytes to discharge in the sea anemone Haliplanella luciae. Taken ...
متن کاملDirect Monitoring of Intracellular Calcium Ions in Sea Anemone Tentacles Suggests Regulation of Nematocyst Discharge by Remote, Rare Epidermal Cells.
In tentacles of sea anemones, cnidocytes and adjacent supporting cells are believed to be independent receptor-effector complexes that regulate nematocyst discharge in response to exogenous N-acetylated sugars. When sugar chemoreceptors on supporting cells are activated, nematocyst discharge is two- to threefold greater than discharge without chemosensitization. To examine the role of Ca2+ as a...
متن کاملThe blastoporal organiser of a sea anemone
amygdala. Both conditioned stimuli and emotional faces produce strong amygdala activation when presented unconsciously, emphasizing the importance of the amygdala as an implicit information processor and its role in unconscious memory. Findings regarding the human amygdala are mainly at the level of the whole region rather than nuclei (Figure 6). Structural and/or functional changes in the amyg...
متن کاملNervous control of light responses in the sea anemone, Calamactis praelongus.
1. The burrowing sea anemone, Calamactis praelongus, responds to light with local, non-nervous contractions of the column. There are also more extensive responses of the column and retractor muscles co-ordinated by nerve net pulses (NNP's) under pacemaker control. 2. NNP's occur in at least two types of bursts and in sequences which sometimes indicate a rotating site of pulse initiation. 3. Lig...
متن کاملRefined structure in solution of the sea anemone neurotoxin ShI.
A high resolution structure in solution has been determined for the polypeptide neurotoxin I, from the sea anemone Stichodactyla helianthus, using NMR data, distance geometry calculations, and refinement by back-calculation of two-dimensional nuclear Overhauser enhancement (NOE) spectra. A set of 913 distance constraints derived from NOEs was used, together with a large set of lower distance bo...
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: CYTOLOGIA
سال: 1959
ISSN: 0011-4545,1348-7019
DOI: 10.1508/cytologia.24.81