Cytoplasm Sentence Examples

Very little is known of the finer structure of the cytoplasm of a vegetable cell.

All cells contain cytoplasm surrounded by a plasma membrane.

It can develop vacuoles, or rather fine bubbles of carbonic acid gas in its cytoplasm, to float up to the surface of the water.

In these, under favorable conditions, streaming movements of the cytoplasm in various directions can be observed.

Some investigators hold that the soaps may become combined with albumin, and that on becoming incorporated with the cytoplasm they can no longer be distinguished as fat.

In pathological cell-division it happens occasionally that the segmentation of the cytoplasm is delayed beyond that of the mitotic network.

Embedded in the chromatophore, much in the same way as the nucleus is embedded in the cytoplasm, are the pyrenoids.

The protoplasm of a living cell con.sists of a semifluid granular substance, called the cytoplasm, one or more nuclei, and sometimes centrosomes and plastids.

Protoplasmic Movements.In the cells of many plants the cytoplasm frequently exhibits movements of circulation or rotation.

In Spirogyra the pyrenoids are distinctly connected by cytoplasmic strands to the central mass of cytoplasm, which surrounds the nucleus, and according to some observers, they increase exclusively by division, followed by a splitting of the cytoplasmic strands.

The separate layers of the starch-grain are deposited on it by the activity of the chrmatophore, and according to Meyer the grain is always surrounded by a thin layer of the chromatophore which completely separates it from the cytoplasm.

In the course of division two bodies appear in the cytoplasm, and behave as centrosomes during the karyokinesis; they gradually become threadlike and coil round each daughter nucleus.

Within the cell, the viral RNA is replicated entirely in the cytoplasm, outside the nucleus containing the cell's own genetic material.

Translation Messenger RNA then passes out of the nucleus and travels to small structures called ribosomes in the cytoplasm.

Includes a splendid image of a Tradescantia stamen hair cell which clearly shows the cytoplasm strands.

Dendrite-A threadlike extension of the cytoplasm of a neuron that conducts electrical impulses toward the cell body of the neuron.

Young cells ar full of cytoplasm, old cells generally contain a large vacuole or vacuoles, containing cell-sap, and with only a thin, almost invisible layer of cytoplasm on their walls.

Albumen crystals are also to be found in the cytoplasm, in leucoplasts and rarely in the nucleus.

In Fucus and allied forms the spindle-fibres between the daughter nuclei disappear early and the new cell-wall is formed in the cytoplasm.

This is usually much clearer and more hyaline than the general cytoplasm.

In many forms deep-staining grains or granules, of a chromatoid nature and of var y ing size, are to be seen in the cytoplasm.

It should be noted that the effector ligand does not enter the bacterial cell cytoplasm in order to exert its effects.

The Schwann cell has an extensive cytoplasm which allows it to wrap a myelin sheath around nerve axons.

These proteins fill the cytoplasm of the highly organized eye lens fiber cells.

It gives access to an ample gastric pouch, covered with very evident cells, whose granular cytoplasm surrounds a clear nucleus.

The tumor cells showed abundant, granular eosinophilic cytoplasm.

Fat cells arise from the fibroblast lineage, and consist of a central lipid droplet, surounded by a thin skin of active cytoplasm.

In all cases tumor cells were relatively small and showed monomorphic or pleomorphic nuclei, prominent nucleoli, and ill-defined cytoplasm.

Fertilization occurs in the animal pole and this triggers a displacement of the egg cytoplasm.

This graph could be used to estimate the concentration of onion cell cytoplasm.

Select your answer ----------------- cell wall nucleus cytoplasm cell membrane 5 Which of the following types of cell is a plant cell?

The germ cells arise from a region of cytoplasm at the vegetal pole of the egg called the germ plasm.

Often, a plant intron is introduced into the code for the bacterial enzyme to enhance transport of the message from nucleus to cytoplasm.

The germ cells arise from a region of cytoplasm at the vegetal pole of the egg called the germ plasm at the vegetal pole of the egg called the germ plasm.

Nuclear translocation - In every known clock, a key step is the translocation of a protein from the cytoplasm into the nucleus.

The fixation made evident the cytoplasm that surrounds the great central vacuole.

Lysosomes - small membrane bound vesicles in the cytoplasm of cells which contain toxic enzymes.

The plastids are not rigidly embedded in the cytoplasm, but are capable of a certain amount of movement therein.

Vol ut-in occurs in the cytoplasm of various Fungi, Bacteria, Cyanophyceae, diatoms, &c., in the form of minute granules which have a characteristic reaction towards methylene blue (Meyer).

Numerous other substances are also found in the cytoplasm, such as tannin, fats and oil, resins, mucilage, caoutchouc, guttapercha, sulphur and calcium oxalate crystals.

In Characeae and Muscineae they are of elongate spiral form, and consist of an elongate dense nucleus and a small quantity of - cytoplasm.

Response to the action of gravity appears to be associated with the movements of starch grains in certain cellsstatolith cellsby which pressure is exerted on the cytoplasm and a stimulus set up which results in the geotropic response.

The cytoplasm of the cell now undergoes division in a line between the two daughter nuclei.

If from some cause the cell be damaged in such a way as to produce disintegration of the cytoplasm, there will be a breaking down of that combination, so that the fat will be set free from the complex protein molecule in which it was combined as a soap-albumin, and will become demonstrable by the usual methods as small droplets of oil.

The cytoplasm is finely granular and fairly uniform in character.

The basic science of fusing the cytoplasm and nucleus and reactivating the cell is very poorly understood.

Evidence is not wanting, however, that the cytoplasm must be regarded as, fundamentally, a semifluid, homogeneous substance in which by its own activity, granules, vacuoles, fibrils, &c., can be formed as secondary structures.

In other forms such as Elodea, Nitella, Chara, &c., where the cytoplasm is mainly restricted to the periphery of the sap vacuole and lining the cell wall, the streaming movement is exhibited in one direction only.

Reference must also be made here to the enzymes or unorganized ferments which occur so largely in the cytoplasm.

The Structure of the Nucleus.In the living condition the resting nucleus appears to consist of a homogeneous ground substance containing a large number of small chromatin granules and one or more large spherical granulesnucleolithe whole being surrounded by a limiting membrane which separates it from the cytoplasm.

They have never been found to cause in fection, and they have not the characters of conidia; the large size of their nuclei, the reduction of their cytoplasm and the absence of reserve material and their thin cell wall all point to their being male gametes.

Centrosome.The centrosome is a minute homogeneous granule found in the cytoplasm of some cells in the neighborhood of the nucleus.

The spindle arises partly from the cytoplasm, partly from the nucleus, or it may be derived entirely from the nucleusintranuclear spindleas occurs in many of the lower plants (Fungi, &c.).

The vitality of these cells being altered there is imbibition and accumulation of watery fluid in their cytoplasm, causing swelling and vacuolation of the cells.

Within the cytoplasm are found manifestations of functional activity, in the form of digestive vacuoles, granules, fat, glycogen, pigment, and foreign bodies.

This is the carpogonium; it consists of a ventral portion which contains a nucleus, but in which no oosphere is differentiated, and an elongated tubular portion known as the trichogyne, into which the cytoplasm extends.

Chromatophores.The chromatophores or plastids are protoplasmic structures, denser than the cytoplasm, and easily distinguishable from it by their color or greater refractive power.

At each pole of this spindle figure there often occur fibres radiating in all directions into the cytoplasm, and sometimes a minute granular body, the centrosome, is also found there.

As division proceeds, the filamentous nature of this cytoplasm becomes more prominent and the threads begin either to converge towards the poles of the nucleus, to form a bipolar spindle, or may converge towards, or radiate from, several different points, to form a multipolar spindle.

In the Thallophytes the cytoplasm may be segmented by constriction, due to the in-growth of a new cell wall from the old one, as in Spirogyra and Cladophora, or by the formation of cleavage furrows in which the new cell-wall is secreted, as occurs in the formation of the spores in many Algae and Fungi.

The cell body, or cytoplasm, is apparently composed of a fine reticulum or network, containing within the meshes a soft viscid, transparent substance, the cell-sap, or hyaloplasm, which is probably a nutrient material to the living cell.

They are spherical, oval, fusiform, or rod-like, and are always found in the cytoplasm, never in the cell-sap. They appear to be permanent organs of the cell, and are transmitted from one cell to another by division.

In a few cases both among the higher and the lower plants, of which the formation of spores in the ascus is a typical example, new cells are formed by the aggregation of portions of the cytoplasm around the nuclei which become delimited from the rest of the cell iontents by a membrane.

Usually the cytoplasm shows a marked affinity for the acid stains, but the different bodies found in the cell may show great variation in their staining reactions.

In some cases the region where the penetration of the male organ takes place is indicated on the oosphere by a hyaline receptive spot (Oedogonium, Vaucheria, &c.), or by a receptive papilla consisting of hyaline cytoplasm (Peronosporeae).

A differentiation of the peripheral cytoplasm in the form of an ectoplasmic layer has been described in one or two instances, and it seems probable that in most Trypanosomes there is such a layer, although only poorly developed, as a rule, around the body generally.

The chromatin is distributed throughout the cytoplasm in the form of granules which may be regarded as a distributed nucleus corresponding to what Hertwig has designated, in protozoa, chromidia.

In the Algae, such as Fucus, Volvox, Oedogonium, Bulbochaete, and in the Fungus Monoblepharis, the spermatozoid is a small oval or elongate cell containing nucleus, cytoplasm and sometimes plastids.

It consists in an unequal number of chromosomes passing over to each of the daughter nuclei, so that one may become hypochromatic, the other hyperchromatic. When this happens the resulting cleavage of the cytoplasm and nucleus is also unequal.

In some cases both the nucleus and the chromatophores may be carried along in the rotating stream, but in others, such as T.Titeila, the chloroplasts may remain motionless iii a non-motile layer of the cytoplasm in direct contact with the cell wall.i Desmids, Diatoms and Oscillaria show creeping movements probably due to the secretion of slime by the cells; the swarmspores and plasmodium of the Myxomycetes exhibit amoehoid movements; and the motile spores of Fungi and Algae, the spermatozoids of mosses, ferns, &c., move by means of delicate prolongations, cilia or flagella cf the protoplast.

The strongest direct evidence seems to be that the nuclear substances are the only parts of the cells which are always equivalent in quantity, and that in the higher plants and animals the male organ or spermatozoid is composed almost entirely of the nucleus, and that the male nucleus is carried into the female cell without a particle of cytoplasm.i Since, however, the nucleus of the female cell is always accompanied by a larger or smaller quantity of cytoplasm, and that in a large majority of the power plants and animals the male cell also contains cytoplasm, it cannot yet be definitely stated that the cytoplasm does not play some part in the process.