Cell Shapes
... that, in themselves, are alive. • An organism’s structure and all of its functions are ultimately due to the activities of its cells. • Cells come only from preexisting cells, not from nonliving matter. All life, therefore, traces its ancestry to the same original cells. • Because of this common anc ...
... that, in themselves, are alive. • An organism’s structure and all of its functions are ultimately due to the activities of its cells. • Cells come only from preexisting cells, not from nonliving matter. All life, therefore, traces its ancestry to the same original cells. • Because of this common anc ...
Bmi-1 regulation of INK4A-ARF is a downstream requirement for transformation of hematopoietic progenitors by E2a-Pbx1.
... but present in Bmi-1⫺/⫺ progenitors (Figure 5C), consistent with a Bmi-1 requirement for INK4A-ARF downregulation. By comparison, p19Arf was expressed at high levels in both wt and Bmi-1⫺/⫺ progenitors immortalized by E2a-Hlf, demonstrating that its oncogenic effects were independent of ARF levels. ...
... but present in Bmi-1⫺/⫺ progenitors (Figure 5C), consistent with a Bmi-1 requirement for INK4A-ARF downregulation. By comparison, p19Arf was expressed at high levels in both wt and Bmi-1⫺/⫺ progenitors immortalized by E2a-Hlf, demonstrating that its oncogenic effects were independent of ARF levels. ...
Plant Cell: Overview
... On the cytoplasmic side, microtubules are found crosslinked to the plasma membrane. Antimicrotubule agents cause changes in the plasma membrane, disrupting cell wall formation. Antiactin drugs do disrupt some key processes such as cell extension and tip growth, but the molecular interactions have ye ...
... On the cytoplasmic side, microtubules are found crosslinked to the plasma membrane. Antimicrotubule agents cause changes in the plasma membrane, disrupting cell wall formation. Antiactin drugs do disrupt some key processes such as cell extension and tip growth, but the molecular interactions have ye ...
Cell Reading Packet
... most have many cells that work together on behalf of the organism. Yet, almost everything an organism does to stay alive is accomplished by each individual cell: getting food, using food for energy, transporting substances, growing, reproducing, and eliminating wastes. Each of these activities invol ...
... most have many cells that work together on behalf of the organism. Yet, almost everything an organism does to stay alive is accomplished by each individual cell: getting food, using food for energy, transporting substances, growing, reproducing, and eliminating wastes. Each of these activities invol ...
Chapter 3 Body Tissues
... – Unique type of epithelium because of its ability to become temporarily modified in arrangement and shape – Composed of modified stratified squamous epithelium – Shape of cells depends upon the amount of stretching – Functions in stretching and the ability to return to normal shape – Locations: uri ...
... – Unique type of epithelium because of its ability to become temporarily modified in arrangement and shape – Composed of modified stratified squamous epithelium – Shape of cells depends upon the amount of stretching – Functions in stretching and the ability to return to normal shape – Locations: uri ...
Unit 5.1: Cell Division and the Cell Cycle
... You consist of a great many cells, but like all other organisms, you started life as a single cell. How did you develop from a single cell into an organism with trillions of cells? The answer is cell division. After cells grow to their maximum size, they divide into two new cells. These new cells ar ...
... You consist of a great many cells, but like all other organisms, you started life as a single cell. How did you develop from a single cell into an organism with trillions of cells? The answer is cell division. After cells grow to their maximum size, they divide into two new cells. These new cells ar ...
Passive transport
... In an aqueous solution -water is the solvent -dissolved substances are the solutes Osmosis is the movement of water from an area of high to low concentration of water -movement of water toward an area of high solute concentration ...
... In an aqueous solution -water is the solvent -dissolved substances are the solutes Osmosis is the movement of water from an area of high to low concentration of water -movement of water toward an area of high solute concentration ...
Supplemental File S3. Acting Transport-Think-pair
... you be allowed to enter at the main entrance? If not, what might you need to cross the membrane? For membrane components, think about what substances you will allow to cross and why. Varies according to role. ACT II Suggested T-P-S Prompt 2 What is a membrane potential and what is its purpose? “Memb ...
... you be allowed to enter at the main entrance? If not, what might you need to cross the membrane? For membrane components, think about what substances you will allow to cross and why. Varies according to role. ACT II Suggested T-P-S Prompt 2 What is a membrane potential and what is its purpose? “Memb ...
Lecture 3a - Membs and Transport
... Carrier-mediated transport of ions and organic substrates into or out of the cell down their concentration gradient. Still passive Can also be called passive carrier-mediated transport ...
... Carrier-mediated transport of ions and organic substrates into or out of the cell down their concentration gradient. Still passive Can also be called passive carrier-mediated transport ...
Stem Cells Stem cells are undifferentiated biological cells, that can
... Stem cells are undifferentiated biological cells, that can differentiate into specialized cells and can divide (through mitosis) to produce more stem cells. They are found in multicellular organisms. In mammals, there are two broad types of stem cells: embryonic stem cells, which are isolated from t ...
... Stem cells are undifferentiated biological cells, that can differentiate into specialized cells and can divide (through mitosis) to produce more stem cells. They are found in multicellular organisms. In mammals, there are two broad types of stem cells: embryonic stem cells, which are isolated from t ...
"Plant Cell: Overview". In: Encyclopedia of Life Science
... On the cytoplasmic side, microtubules are found crosslinked to the plasma membrane. Antimicrotubule agents cause changes in the plasma membrane, disrupting cell wall formation. Antiactin drugs do disrupt some key processes such as cell extension and tip growth, but the molecular interactions have ye ...
... On the cytoplasmic side, microtubules are found crosslinked to the plasma membrane. Antimicrotubule agents cause changes in the plasma membrane, disrupting cell wall formation. Antiactin drugs do disrupt some key processes such as cell extension and tip growth, but the molecular interactions have ye ...
PROJECT PROPOSAL for applicants for Ph.D. fellowships
... Plant cells have noticeable developmental plasticity. One of the most interesting examples of this plasticity is somatic embryogenesis during which differentiated somatic plant cells regain totipotency and develop into embryos and after plants. In order to be able to initiate the embryogenic program ...
... Plant cells have noticeable developmental plasticity. One of the most interesting examples of this plasticity is somatic embryogenesis during which differentiated somatic plant cells regain totipotency and develop into embryos and after plants. In order to be able to initiate the embryogenic program ...
Cell Structure - Trimble County Schools
... • Pores- regulate the entry and exit of molecules from the nucleus ...
... • Pores- regulate the entry and exit of molecules from the nucleus ...
- Iranian Journal of Science and Technology (Sciences)
... digestion by beneficial gut bacteria increases their number and creates short-chain fatty acids which colon cells use as fuel and reduces cholesterol (Murray et al., 2005). ...
... digestion by beneficial gut bacteria increases their number and creates short-chain fatty acids which colon cells use as fuel and reduces cholesterol (Murray et al., 2005). ...
Tendon development and musculoskeletal assembly: emerging
... the question of where the patterning information for muscle connectivity lies, within the TPCs or within the muscles themselves? Chick-quail chimera studies suggests that, at least for cranial and limb muscles, the TPCs and tendon matrix determine the pattern of attachments (Kardon, 1998; Kieny and ...
... the question of where the patterning information for muscle connectivity lies, within the TPCs or within the muscles themselves? Chick-quail chimera studies suggests that, at least for cranial and limb muscles, the TPCs and tendon matrix determine the pattern of attachments (Kardon, 1998; Kieny and ...
Cell Cycle Notes
... therefore, cells only grow to a certain size. 2. Renewal & Repair – Cell division is used to replace cells that die from normal wear & tear; for example, _skin cells_____ and _blood cells______. Other types of cells maintain the ability to divide, but keep it in reserve unless severely damaged; for ...
... therefore, cells only grow to a certain size. 2. Renewal & Repair – Cell division is used to replace cells that die from normal wear & tear; for example, _skin cells_____ and _blood cells______. Other types of cells maintain the ability to divide, but keep it in reserve unless severely damaged; for ...
Gene Section BLNK (B-cell linker) Atlas of Genetics and Cytogenetics
... Blnk-deficient pre-B cells acquiring sporadic alterations in the p19Arf-Mdm2-p53 are selected to become malignant. Furthermore, expression of p19Arf in Blnk-deficient leukemias possibly promotes survival under metabolic stress. The Jak3/Stat5 signaling pathway is constitutively activated in pre-B le ...
... Blnk-deficient pre-B cells acquiring sporadic alterations in the p19Arf-Mdm2-p53 are selected to become malignant. Furthermore, expression of p19Arf in Blnk-deficient leukemias possibly promotes survival under metabolic stress. The Jak3/Stat5 signaling pathway is constitutively activated in pre-B le ...
Tissues: The living fabric
... • Polarity – apical and basal surfaces – Apical = free upper surface exposed to exterior of body or cavity (some are slick, some have cilia, most have microvilli) – Basal = lower surface attached ...
... • Polarity – apical and basal surfaces – Apical = free upper surface exposed to exterior of body or cavity (some are slick, some have cilia, most have microvilli) – Basal = lower surface attached ...
Extracellular matrix
In biology, the extracellular matrix (ECM) is a collection of extracellular molecules secreted by cells that provides structural and biochemical support to the surrounding cells. Because multicellularity evolved independently in different multicellular lineages, the composition of ECM varies between multicellular structures; however, cell adhesion, cell-to-cell communication and differentiation are common functions of the ECM.The animal extracellular matrix includes the interstitial matrix and the basement membrane. Interstitial matrix is present between various animal cells (i.e., in the intercellular spaces). Gels of polysaccharides and fibrous proteins fill the interstitial space and act as a compression buffer against the stress placed on the ECM. Basement membranes are sheet-like depositions of ECM on which various epithelial cells rest.The plant ECM includes cell wall components, like cellulose, in addition to more complex signaling molecules. Some single-celled organisms adopt multicelluar biofilms in which the cells are embedded in an ECM composed primarily of extracellular polymeric substances (EPS).