C 2. Electrical properties of the heart a. Explain
... These conducting cells are of a large diameter and have many gap junctions, transmitting the action potential rapidly throughout the ventricles. The transmission time for the entire Purkinje system is 30 ms. Propagation to the entire ventricular muscle takes another 30 ms, yielding a coordinated con ...
... These conducting cells are of a large diameter and have many gap junctions, transmitting the action potential rapidly throughout the ventricles. The transmission time for the entire Purkinje system is 30 ms. Propagation to the entire ventricular muscle takes another 30 ms, yielding a coordinated con ...
... to how proteins are synthesized, the reverse process, i.e. how proteins are degraded, long received little attention. A pioneer in this field was Schoenheimer, who in 1942 published results from isotope tracer techniques indicating that proteins in animals are continuously synthesized and degraded a ...
Cells - MCQ topic quiz
... © OCR 2016 - This resource may be freely copied and distributed, as long as the OCR logo and this message remain intact and OCR is acknowledged as the originator of this work. OCR acknowledges the use of the following content: n/a Please get in touch if you want to discuss the accessibility of resou ...
... © OCR 2016 - This resource may be freely copied and distributed, as long as the OCR logo and this message remain intact and OCR is acknowledged as the originator of this work. OCR acknowledges the use of the following content: n/a Please get in touch if you want to discuss the accessibility of resou ...
The functions of cell wall polysaccharides in composition and
... during plant development. If all the cytosolic proteins that function in substrate generation are included, the number increases significantly. Some integral plasma membrane-associated proteins that function in wall assembly, such as cellulose synthase, do not contain signal peptides. Thus, it is li ...
... during plant development. If all the cytosolic proteins that function in substrate generation are included, the number increases significantly. Some integral plasma membrane-associated proteins that function in wall assembly, such as cellulose synthase, do not contain signal peptides. Thus, it is li ...
Cell Cycle-specific Effects of Tumor Necrosis
... progression through various phases of the cell cycle were studied indicate that in the presence of TNF cells do progress through G2, although with considerable delay, and reach mitosis. Most cells die (undergo lysis) specifically at late stages of mitosis (telophase) or soon after cytokinesis. Sensi ...
... progression through various phases of the cell cycle were studied indicate that in the presence of TNF cells do progress through G2, although with considerable delay, and reach mitosis. Most cells die (undergo lysis) specifically at late stages of mitosis (telophase) or soon after cytokinesis. Sensi ...
Fc Macrophages via the ERK Pathway Receptor Cross-linking Stimulates Cell Proliferation of *
... The mammalian cell cycle is divided into G1, S, G2, and M phases. The regulation of this cycle is primarily controlled by periodic synthesis and destruction/activation of cyclins, which in turn bind to, and activate cyclin-dependent kinases (CDKs). Cyclin D expression is induced by external mitogeni ...
... The mammalian cell cycle is divided into G1, S, G2, and M phases. The regulation of this cycle is primarily controlled by periodic synthesis and destruction/activation of cyclins, which in turn bind to, and activate cyclin-dependent kinases (CDKs). Cyclin D expression is induced by external mitogeni ...
Measuring Electrical and Mechanical Properties of Red Blood Cells
... force as a straight line at 45 degrees. Among the parameters used by the models the laser power measurement has been the most difficult to obtain, because the usual power meters readings are not accurate for the very high numerical aperture of the beam after the objective. We solved this problem usi ...
... force as a straight line at 45 degrees. Among the parameters used by the models the laser power measurement has been the most difficult to obtain, because the usual power meters readings are not accurate for the very high numerical aperture of the beam after the objective. We solved this problem usi ...
Derivation of haploid embryonic stem cells from mouse embryos
... screening2. Recently, haploid pluripotent cell lines from medaka fish (Oryzias latipes) have also been established3. In contrast, haploidy seems less compatible with development in mammals4,5. Although haploid cells have been observed in egg cylinder stage parthenogenetic mouse embryos6, most cells ...
... screening2. Recently, haploid pluripotent cell lines from medaka fish (Oryzias latipes) have also been established3. In contrast, haploidy seems less compatible with development in mammals4,5. Although haploid cells have been observed in egg cylinder stage parthenogenetic mouse embryos6, most cells ...
A theoretical analysis of the ephaptic feedback mechanism
... by substituting reasonable values for the two free parameters, p and T . Two free parameters, for which no precise values are currently available, are still present in the model: p , the fraction of glutamate gated channels on the tip of the horizontal cell dendrites, and T , the tortuosity factor w ...
... by substituting reasonable values for the two free parameters, p and T . Two free parameters, for which no precise values are currently available, are still present in the model: p , the fraction of glutamate gated channels on the tip of the horizontal cell dendrites, and T , the tortuosity factor w ...
Cell Host & Microbe
... made by Li et al. (2014) that supports this model was that BIK1 and its related cytoplasmic kinase PBL1 were required for the full activation of calcium influx triggered by flg22. This result indicates that RbohD activation by BIK1 may occur earlier than the calcium-dependent activation. While under ...
... made by Li et al. (2014) that supports this model was that BIK1 and its related cytoplasmic kinase PBL1 were required for the full activation of calcium influx triggered by flg22. This result indicates that RbohD activation by BIK1 may occur earlier than the calcium-dependent activation. While under ...
Chapter 3 PowerPoint - Hillsborough Community College
... • Every cell type has different patterns of this “sugar coating” – Functions as specific biological markers for cellto-cell recognition – Allows immune system to recognize “self” vs. “nonself” © 2016 Pearson Education, Inc. ...
... • Every cell type has different patterns of this “sugar coating” – Functions as specific biological markers for cellto-cell recognition – Allows immune system to recognize “self” vs. “nonself” © 2016 Pearson Education, Inc. ...
final round
... b. Penicillin will diffuse into the cell c. The cell will undergo osmotic lysis d. The cell will plasmolyze (correct answer) BACK TO GAME ...
... b. Penicillin will diffuse into the cell c. The cell will undergo osmotic lysis d. The cell will plasmolyze (correct answer) BACK TO GAME ...
Octamer-binding transcription factors: genomics and functions
... acids; POUs, POU-specific domain; WFC, WFC motif. B. Crystal structure of DNA binding of the POU-specific domain and the POU-homeodomain (POUH). The helices (H) of each POU domain and the N- and C-termini are labeled. B is reproduced with permission from (37). The POUS is only present in POU factors ...
... acids; POUs, POU-specific domain; WFC, WFC motif. B. Crystal structure of DNA binding of the POU-specific domain and the POU-homeodomain (POUH). The helices (H) of each POU domain and the N- and C-termini are labeled. B is reproduced with permission from (37). The POUS is only present in POU factors ...
The Arabidopsis Exocyst Complex Is Involved in
... subunit by coimmunoprecipitation with the remaining subunits (Guo et al., 1999a). Electron microscopy and analyses of cargo protein trafficking in yeast exo84 mutants indicated that Exo84 is involved in the post-Golgi stage of secretion (Zhang et al., 2005b). The same study demonstrated that Exo84 p ...
... subunit by coimmunoprecipitation with the remaining subunits (Guo et al., 1999a). Electron microscopy and analyses of cargo protein trafficking in yeast exo84 mutants indicated that Exo84 is involved in the post-Golgi stage of secretion (Zhang et al., 2005b). The same study demonstrated that Exo84 p ...
RtoA links initial cell type choice to the cell cycle in
... 3678 S. A. Wood and others only 25% of the cells expressed ecmA. These results suggest that initial cell fate is a cell-autonomous process and is not dependent on a morphogen gradient. We and others have hypothesized that initial cell-type choice is a cell-autonomous process correlated with the cel ...
... 3678 S. A. Wood and others only 25% of the cells expressed ecmA. These results suggest that initial cell fate is a cell-autonomous process and is not dependent on a morphogen gradient. We and others have hypothesized that initial cell-type choice is a cell-autonomous process correlated with the cel ...
Signalling in Plant Lateral Organ Development
... the basis for heritable cell identity within a layer. It also raises the possibility that cell identity might itself affect cell division patterns, maintaining the clonal distinction of layers and effectively creating developmental compartments within which cells inherit identity as they proliferate ...
... the basis for heritable cell identity within a layer. It also raises the possibility that cell identity might itself affect cell division patterns, maintaining the clonal distinction of layers and effectively creating developmental compartments within which cells inherit identity as they proliferate ...
Phospholipids: Membrane Components Steroids: Four Fused Rings
... Metabolism Enzymes bring reactants together and thereby speed chemical reactions in cells. They are specific for one particular type of reaction and can function at body temperature. Support Some proteins have a structural function. For example, keratin makes up hair and nails, while collagen lends ...
... Metabolism Enzymes bring reactants together and thereby speed chemical reactions in cells. They are specific for one particular type of reaction and can function at body temperature. Support Some proteins have a structural function. For example, keratin makes up hair and nails, while collagen lends ...
JOHN MASON PAWELEK, Ph
... Aberrant glycosylation is an independent predictor of metastasis and poor survival in breast carcinoma. Breast Cancer Research Conference, Yale Cancer Center. 01/13/04 “Origins of cancer.” Spotlight on Research: Yale Animal Care and Use Seminar Series. 02/12/04. “Cancer.” Nursing Program, University ...
... Aberrant glycosylation is an independent predictor of metastasis and poor survival in breast carcinoma. Breast Cancer Research Conference, Yale Cancer Center. 01/13/04 “Origins of cancer.” Spotlight on Research: Yale Animal Care and Use Seminar Series. 02/12/04. “Cancer.” Nursing Program, University ...
A mutation in the nucleoporin-107 gene causes XX gonadal
... In Drosophila, each adult ovary consists of 15 to 20 parallel ovarioles, which contain a series of sequentially developing follicles called egg chambers (reviewed in refs. 19, 20). Each Drosophila oocyte develops within an egg chamber that contains both germ cells and somatic cells. Somatic follicle ...
... In Drosophila, each adult ovary consists of 15 to 20 parallel ovarioles, which contain a series of sequentially developing follicles called egg chambers (reviewed in refs. 19, 20). Each Drosophila oocyte develops within an egg chamber that contains both germ cells and somatic cells. Somatic follicle ...
A genome-wide resource of cell cycle and cell shape genes of
... delayed in cell cycle progression because they continue to grow but fail to divide and thus become elongated. However, not all genes required for the cell cycle show a long cell phenotype when deleted. For example, genes encoding checkpoint proteins that are not required during a normal cell cycle m ...
... delayed in cell cycle progression because they continue to grow but fail to divide and thus become elongated. However, not all genes required for the cell cycle show a long cell phenotype when deleted. For example, genes encoding checkpoint proteins that are not required during a normal cell cycle m ...
Untitled - University of Guelph
... Figure 1. Responses in growth and development of diffusely (a–c) and tip-growing (d) cells to disturbances in their microtubule (middle column) and actin (right column) cytoskeletons. Pharmaceutical experiments using microtubule-depolymerizing herbicides such as oryzalin and the microtubule-stabiliz ...
... Figure 1. Responses in growth and development of diffusely (a–c) and tip-growing (d) cells to disturbances in their microtubule (middle column) and actin (right column) cytoskeletons. Pharmaceutical experiments using microtubule-depolymerizing herbicides such as oryzalin and the microtubule-stabiliz ...
Beyond the meristems: similarities in the
... plan evolution, however, also requires the ability of the plant to undergo cell separation and loss of organs. In this respect, it is tempting to propose that signalling mechanisms regulating plant architecture may have evolved from an ancestral set of components, which adapted to give different dev ...
... plan evolution, however, also requires the ability of the plant to undergo cell separation and loss of organs. In this respect, it is tempting to propose that signalling mechanisms regulating plant architecture may have evolved from an ancestral set of components, which adapted to give different dev ...
A nuclear lamin is required for cytoplasmic organization and egg polarity in Drosophila. Nature Cell Biology 3, 848-851. pdf
... membrane proteins, so they can influence chromosome organization and possibly gene expression6,10,16. gurken transcripts are synthesized in the oocyte nucleus and must interact with the Squid hnRNP protein and possibly K10, a putative RNA-binding protein, in order to localize properly after export i ...
... membrane proteins, so they can influence chromosome organization and possibly gene expression6,10,16. gurken transcripts are synthesized in the oocyte nucleus and must interact with the Squid hnRNP protein and possibly K10, a putative RNA-binding protein, in order to localize properly after export i ...
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.