Ultrastructure of cell types of the olfactory epithelium in a catfish
... As in other catfishes (Yamamoto and Ueda 1978; Erickson and Caprio 1984; Theisen et al 1991) the microvillous and ciliated receptor cells are distributed in the sensory area of the olfactory epithelium ofH. fossilis. The independency of ciliated and microvillous receptors is now established through ...
... As in other catfishes (Yamamoto and Ueda 1978; Erickson and Caprio 1984; Theisen et al 1991) the microvillous and ciliated receptor cells are distributed in the sensory area of the olfactory epithelium ofH. fossilis. The independency of ciliated and microvillous receptors is now established through ...
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... We have argued earlier that parasites can use many points of entry to begin invasion. They can enter through inhaled air like the tuberculosis bacillus; through the gut wall like the typhoid bacterium; or via skin like malarial parasites which get in through a mosquito bite. The immune system is sca ...
... We have argued earlier that parasites can use many points of entry to begin invasion. They can enter through inhaled air like the tuberculosis bacillus; through the gut wall like the typhoid bacterium; or via skin like malarial parasites which get in through a mosquito bite. The immune system is sca ...
Section 16.1 What Is Cancer?
... with mildly aberrant cells and progressing to cells that are increasingly tumorigenic and malignant. Each step in tumorigenesis appears to be the result of two or more genetic alterations that progressively release the cell from the normal controls on cell proliferation and malignancy. – The progr ...
... with mildly aberrant cells and progressing to cells that are increasingly tumorigenic and malignant. Each step in tumorigenesis appears to be the result of two or more genetic alterations that progressively release the cell from the normal controls on cell proliferation and malignancy. – The progr ...
Transport in plants
... • Companion cells use ATP to transport hydrogen ions out of their cytoplasm • As hydrogen ions are now at a high concentration outside the companion cells, they are brought back in by diffusion through special co-transporter proteins, which also bring the sucrose in at the same time • As the concent ...
... • Companion cells use ATP to transport hydrogen ions out of their cytoplasm • As hydrogen ions are now at a high concentration outside the companion cells, they are brought back in by diffusion through special co-transporter proteins, which also bring the sucrose in at the same time • As the concent ...
Topics for Discussion The Extracellular Matrix
... When people typically culture cells on TC plastic, they do so in the presence of media, which usually contains serum. And the serum itself contains ECM molecules. So yes, the cells are exposed to ECM, where you have a number of molecules such as fibronectin and vitronectin within the serum, that can ...
... When people typically culture cells on TC plastic, they do so in the presence of media, which usually contains serum. And the serum itself contains ECM molecules. So yes, the cells are exposed to ECM, where you have a number of molecules such as fibronectin and vitronectin within the serum, that can ...
BSc.-I Medical - DAV College Jalandhar
... Stains and dyes are frequently used to highlight structures in microbes for viewing, often with the aid of different microscopes. Staining may be single or double. 1. Single Stain: Safranin or fast green is used to stain filaments of lagae, fungi, sections of bryophytes, spores of pteridophytes, pol ...
... Stains and dyes are frequently used to highlight structures in microbes for viewing, often with the aid of different microscopes. Staining may be single or double. 1. Single Stain: Safranin or fast green is used to stain filaments of lagae, fungi, sections of bryophytes, spores of pteridophytes, pol ...
Lesson Overview
... In many cells, the smooth ER contains collections of enzymes that perform specialized tasks, including the synthesis of membrane lipids and the detoxification of drugs. ...
... In many cells, the smooth ER contains collections of enzymes that perform specialized tasks, including the synthesis of membrane lipids and the detoxification of drugs. ...
An Overview of the Muscle Cell Cytoskeleton
... fiber in a structure termed the myotendinousjunction (Figure 3). The cell membrane in this region is folded into a series of finger-like processes that are in proximityto collagen bundles in the extracellular space (Ishiwata et al., 1983; Trotter, 1990; Tidball and Law, 1991). Thin filaments come cl ...
... fiber in a structure termed the myotendinousjunction (Figure 3). The cell membrane in this region is folded into a series of finger-like processes that are in proximityto collagen bundles in the extracellular space (Ishiwata et al., 1983; Trotter, 1990; Tidball and Law, 1991). Thin filaments come cl ...
Ch10p3
... products of photosynthesis? • O2: consumed during cellular respiration • 50% of sugar made by plant is consumed by plant in respiration • some are incorporated into polysaccharides: ...
... products of photosynthesis? • O2: consumed during cellular respiration • 50% of sugar made by plant is consumed by plant in respiration • some are incorporated into polysaccharides: ...
Endosymbiosis: Eukaryotes and their Organelles
... The big endosymbiosis mystery standing today is what exactly is the origin of organelles?-is this first sentence necessary? A theory that attempts to answer this question is the endosymbiotic theory.-didn’t you already mention this? The word endosymbiosis is just a combination of “endo”, meaning to ...
... The big endosymbiosis mystery standing today is what exactly is the origin of organelles?-is this first sentence necessary? A theory that attempts to answer this question is the endosymbiotic theory.-didn’t you already mention this? The word endosymbiosis is just a combination of “endo”, meaning to ...
A1.3 SG - Mrs. Lee`s Science Class
... 1. What are the 3 characteristics used to place organisms into domains & kingdoms? • Cell type (prokaryotes or eukaryotes) • Cell number (unicellular or multicellular or both) • Ability to make food (autotrophs or heterotrophs or both) 2. What are prokaryotes & eukaryotes? • prokaryotes = organisms ...
... 1. What are the 3 characteristics used to place organisms into domains & kingdoms? • Cell type (prokaryotes or eukaryotes) • Cell number (unicellular or multicellular or both) • Ability to make food (autotrophs or heterotrophs or both) 2. What are prokaryotes & eukaryotes? • prokaryotes = organisms ...
Skin and bones: the bacterial cytoskeleton, cell wall, and cell
... during which wall synthesis is localized adjacent to the FtsZ ring. Finally, cell division occurs. ...
... during which wall synthesis is localized adjacent to the FtsZ ring. Finally, cell division occurs. ...
SC-Biology South Carolina Academic Standards 2005
... Exemplify ways that introduce new genetic characteristics into an organism or a population by applying the principles of modern genetics. Proteins and Nucleic Acids Cell Cycle Meiosis Applications of DNA Technology Consequences of DNA Technology ...
... Exemplify ways that introduce new genetic characteristics into an organism or a population by applying the principles of modern genetics. Proteins and Nucleic Acids Cell Cycle Meiosis Applications of DNA Technology Consequences of DNA Technology ...
Harvard Summer Program Immunology Project Resource
... chemical constituents needed to synthesize other molecules; enzymes facilitate the breakdown and synthesis of molecules. ...
... chemical constituents needed to synthesize other molecules; enzymes facilitate the breakdown and synthesis of molecules. ...
Plant cell expansion: scaling the wall Fr´ed´eric Nicol and Herman H
... This domain shows sequence similarity to two bZIP transcription factors from soybean (unpublished data) and is most likely involved in protein–protein interactions. Having identified RSW1 and related genes, the rapid isolation of the other subunits of the cellulose synthase complex using yeast two-h ...
... This domain shows sequence similarity to two bZIP transcription factors from soybean (unpublished data) and is most likely involved in protein–protein interactions. Having identified RSW1 and related genes, the rapid isolation of the other subunits of the cellulose synthase complex using yeast two-h ...
A NIMA-related kinase, Cnk2p, regulates both
... Cilia (also known as flagella) are assembled via a process called intraflagellar transport (IFT). IFT was discovered in Chlamydomonas (Kozminski et al., 1993) and involves the anterograde and retrograde movement of large protein complexes (IFT particles) to and from the distal tip of the flagella, d ...
... Cilia (also known as flagella) are assembled via a process called intraflagellar transport (IFT). IFT was discovered in Chlamydomonas (Kozminski et al., 1993) and involves the anterograde and retrograde movement of large protein complexes (IFT particles) to and from the distal tip of the flagella, d ...
Telocytes, exosomes, gap junctions and the cytoskeleton: the
... epigenetic modulation of the embedded stem cells. We have already drawn attention to the fact that podoms are arranged in a manner that is reminiscent of axonal boutons en passage. This flow of signals along the podom could trigger release of small signaling molecules at the gap junctions of the syn ...
... epigenetic modulation of the embedded stem cells. We have already drawn attention to the fact that podoms are arranged in a manner that is reminiscent of axonal boutons en passage. This flow of signals along the podom could trigger release of small signaling molecules at the gap junctions of the syn ...
PDF
... based on a volume function. For scenarios 1 and 2 the following equation was used for the increase of volume for cell a per time step (DV): DVaVd⭈0.018⭈ra, where Vd is the threshold volume at which a cell divides and ra is a cell-specific growth rate. This rate is a random dimensionless number betw ...
... based on a volume function. For scenarios 1 and 2 the following equation was used for the increase of volume for cell a per time step (DV): DVaVd⭈0.018⭈ra, where Vd is the threshold volume at which a cell divides and ra is a cell-specific growth rate. This rate is a random dimensionless number betw ...
Chromatin meets the cell cycle
... eukaryotes, and all of these proteins have homologues in plant genomes (Clapier and Cairns, 2009). Chromatin remodellers alter chromatin structure in various way: they can promote nucleosome sliding, ejection, or unwrapping and facilitate the exchange of histone variants (Clapier and Cairns, 2009). ...
... eukaryotes, and all of these proteins have homologues in plant genomes (Clapier and Cairns, 2009). Chromatin remodellers alter chromatin structure in various way: they can promote nucleosome sliding, ejection, or unwrapping and facilitate the exchange of histone variants (Clapier and Cairns, 2009). ...
Formation and maintenance of the shoot apical meristem
... Fig. 2. Expression patterns of genes directing the establishment and maintenance of the shoot apical meristem (SAM) form gradually during embryogenesis. (a–f) Expression patterns of six genes: the upper panel depicts the expression in a frontal section9 of a late globular-transition stage of embryog ...
... Fig. 2. Expression patterns of genes directing the establishment and maintenance of the shoot apical meristem (SAM) form gradually during embryogenesis. (a–f) Expression patterns of six genes: the upper panel depicts the expression in a frontal section9 of a late globular-transition stage of embryog ...
Cell cycle
The cell cycle or cell-division cycle is the series of events that take place in a cell leading to its division and duplication (replication) that produces two daughter cells. In prokaryotes which lack a cell nucleus, the cell cycle occurs via a process termed binary fission. In cells with a nucleus, as in eukaryotes, the cell cycle can be divided into three periods: interphase, the mitotic (M) phase, and cytokinesis. During interphase, the cell grows, accumulating nutrients needed for mitosis, preparing it for cell division and duplicating its DNA. During the mitotic phase, the cell splits itself into two distinct daughter cells. During the final stage, cytokinesis, the new cell is completely divided. To ensure the proper division of the cell, there are control mechanisms known as cell cycle checkpoints.The cell-division cycle is a vital process by which a single-celled fertilized egg develops into a mature organism, as well as the process by which hair, skin, blood cells, and some internal organs are renewed. After cell division, each of the daughter cells begin the interphase of a new cycle. Although the various stages of interphase are not usually morphologically distinguishable, each phase of the cell cycle has a distinct set of specialized biochemical processes that prepare the cell for initiation of cell division.