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Biomedical subjects

P SATIR

Publications and source records attributed to P SATIR.

4 recordsLinked to original sources
PubMed1965

A NEW APICAL MICROTUBULE-ASSOCIATED ORGANELLE IN THE STERNAL GLAND OF ZOOTERMOPSIS NEVADENSIS (HAGEN), ISOPTERA.

The apical portion of the columnar cells of the sternal gland of the termite Zootermopsis nevadensis (Hagen) has been examined with the electron microscope. The cell surface abutting the cuticle is thrown into ridges upon which stand microvilli. Sections show a network of smooth membrane-bound cisternae penetrating the interior of the microvilli. At the bottom of the crevasses between the ridges, an inpocketing of the cell membrane is often found. This is surrounded by a 40-mmicro electron-opaque zone that is the insertion of a 22-mmicro microtubular component of the cell cytoplasm. The pouch-like structures and their associated microtubules are considered to represent a new cell organelle.

Animals↗
PubMed1963

STUDIES ON CILIA. THE FIXATION OF THE METACHRONAL WAVE.

Upon excision into spring water, the lateral cilia of the gill of the freshwater mussel Elliptio complanatus (Solander) stop beating, but 0.04 M potassium ion can activate the gill so that these cilia again beat with metachronal rhythm. One per cent osmium tetroxide quickly pipetted onto a fully activated gill fixes the lateral cilia in a pattern that preserves the form and arrangement of the metachronal wave, and permits the cilia to be studied with the electron microscope in all stages of their beat cycle. Changes are seen in the fixed active preparation that are not present in the inactive control, i.e., in the packing of the cilia, the position of the axis of the ciliary cross-section, and the diameter of the ring of peripheral filaments. Analysis of these parameters may lead to new correlations between ciliary fine structure and function.

Animals↗
PubMed1961

Cilia.

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Cell Biology↗