Cell Physiology
... substances against concentration gradients (from low to high, or up a gradient concentration. ...
... substances against concentration gradients (from low to high, or up a gradient concentration. ...
AP Bio membranes
... • Because anions and cations are unequally distributed across plasma membranes, all cells have voltages across their plasma membrane (membrane potential). • Forces that drive passive transport of ions across membranes include: concentration gradient of the ion (chemical force), and effect of membran ...
... • Because anions and cations are unequally distributed across plasma membranes, all cells have voltages across their plasma membrane (membrane potential). • Forces that drive passive transport of ions across membranes include: concentration gradient of the ion (chemical force), and effect of membran ...
Biology II – Chapter 4 Key Terms
... normally against a concentration gradient 2. carrier protein – a membrane protein that facilitates the diffusion of specific substances across the membrane 3. cell wall – a layer of material, normally made up of cellulose or cellulose-like materials, that is outside the plasma membrane of plants, fu ...
... normally against a concentration gradient 2. carrier protein – a membrane protein that facilitates the diffusion of specific substances across the membrane 3. cell wall – a layer of material, normally made up of cellulose or cellulose-like materials, that is outside the plasma membrane of plants, fu ...
Discovery of a new cellular structure—the porosome
... these proteins, the N-ethylmaleimide-sensitive factor (NSF)-attachment protein receptors (SNAREs) have been implicated as the minimal fusion machinery capable of fusing opposing bilayers (Weber et al., 1998). Target SNAREs or t-SNAREs (involving two proteins) are located at the cell plasma membrane ...
... these proteins, the N-ethylmaleimide-sensitive factor (NSF)-attachment protein receptors (SNAREs) have been implicated as the minimal fusion machinery capable of fusing opposing bilayers (Weber et al., 1998). Target SNAREs or t-SNAREs (involving two proteins) are located at the cell plasma membrane ...
Bacteria with vuvuzelas: Microbes use a channel protein
... with the bacteria; the pathogens then attack the cells of their victims with a deadly cocktail of various toxins. Scientists at the Max Planck Institute of Molecular Physiology in Dortmund working together with colleagues from Freiburg University and Jacobs University Bremen, have discovered that th ...
... with the bacteria; the pathogens then attack the cells of their victims with a deadly cocktail of various toxins. Scientists at the Max Planck Institute of Molecular Physiology in Dortmund working together with colleagues from Freiburg University and Jacobs University Bremen, have discovered that th ...
BIOAVAILABILITY Membranes
... Reasons for differences: completeness and rate of absorption Definition: rate and extent to which a drug substance or its active moiety is delivered from the dosage form to the systemic ...
... Reasons for differences: completeness and rate of absorption Definition: rate and extent to which a drug substance or its active moiety is delivered from the dosage form to the systemic ...
Chapter 8: CELL MEMBRANE
... the cell (i.e. a hormone) which causes a change on the other end of the protein on the inner surface of the cell; this triggers a response within the cell ...
... the cell (i.e. a hormone) which causes a change on the other end of the protein on the inner surface of the cell; this triggers a response within the cell ...
Chapter 8: CELL MEMBRANE
... the cell (i.e. a hormone) which causes a change on the other end of the protein on the inner surface of the cell; this triggers a response within the cell ...
... the cell (i.e. a hormone) which causes a change on the other end of the protein on the inner surface of the cell; this triggers a response within the cell ...
3. Membranes are mosaics of structure and function
... • For example, cold-adapted organisms, such as winter wheat, increase the percentage of unsaturated phospholipids in the autumn. • This allows these organisms to prevent their membranes from solidifying during winter. ...
... • For example, cold-adapted organisms, such as winter wheat, increase the percentage of unsaturated phospholipids in the autumn. • This allows these organisms to prevent their membranes from solidifying during winter. ...
29 - Alamo Colleges
... Dynamic series of rods running through the cytosol Consists of microtubules, microfilaments, and intermediate filaments ...
... Dynamic series of rods running through the cytosol Consists of microtubules, microfilaments, and intermediate filaments ...
chapt05_lecture
... transmembrane protein can create a pore through the membrane – Cylinder of sheets in the protein secondary structure called a -barrel • Interior is polar and allows water and small polar molecules to pass through the membrane ...
... transmembrane protein can create a pore through the membrane – Cylinder of sheets in the protein secondary structure called a -barrel • Interior is polar and allows water and small polar molecules to pass through the membrane ...
BIO1019 Lecture 20 - phospholipids
... Phosphoacylglycerols (Phospholipids) • Phosphoacylglycerols are fatty acid esters of glycerol which also contain a phosphate group and other specific groups • The phosphate group replaces the fatty acid on C number 3 of a ...
... Phosphoacylglycerols (Phospholipids) • Phosphoacylglycerols are fatty acid esters of glycerol which also contain a phosphate group and other specific groups • The phosphate group replaces the fatty acid on C number 3 of a ...
The structure and function of the Mitochondrion
... The mitochondrion is a double membrane organelle found in eukaryotic cells, responsible for ATP production. Its size range between 1µm – a few µm, may be individual or branched, have a tubular network and may change shape. ...
... The mitochondrion is a double membrane organelle found in eukaryotic cells, responsible for ATP production. Its size range between 1µm – a few µm, may be individual or branched, have a tubular network and may change shape. ...
Aims - Excellence Gateway
... the sides to form vesicles which then fuse together to form a tightly packed group of flattened cavities. ...
... the sides to form vesicles which then fuse together to form a tightly packed group of flattened cavities. ...
I. Characteristics of amino acids and folding of nascent polypeptides
... Post-translational process: After translation of the SS-containing precursor polypeptide, SecA binds to it (at the SS) while in the cytoplasm; an additional chaperone like SecB may also bind to other regions of the polypeptide to keep it from folding. The SecA-precursor protein complex then binds t ...
... Post-translational process: After translation of the SS-containing precursor polypeptide, SecA binds to it (at the SS) while in the cytoplasm; an additional chaperone like SecB may also bind to other regions of the polypeptide to keep it from folding. The SecA-precursor protein complex then binds t ...
cell membrane - McEachern High School
... • If cell is too big, takes too long for necessary chemicals to get around the cell. • Insects and elephants have cells that are the same size, the elephant just has more of them and the ones they have are more specialized. ...
... • If cell is too big, takes too long for necessary chemicals to get around the cell. • Insects and elephants have cells that are the same size, the elephant just has more of them and the ones they have are more specialized. ...
Cell Membrane PPT - Gulfport School District
... different composition than the outside environment. This requires work—energy from ATP is needed to move substances against their concentration gradients (active transport). Specific carrier proteins move substances in only one direction, either into or out of the cell. ...
... different composition than the outside environment. This requires work—energy from ATP is needed to move substances against their concentration gradients (active transport). Specific carrier proteins move substances in only one direction, either into or out of the cell. ...
2_DNA_structure
... The FATTY ACID chains in phospholipids and glycolipids usually contain an even number of carbon atoms, typically between 14 and 24. The 16- and 18-carbon fatty acids are the most common. In animal cells, cholesterol is found dispersed in varying degrees throughout cell membranes, where it confers a ...
... The FATTY ACID chains in phospholipids and glycolipids usually contain an even number of carbon atoms, typically between 14 and 24. The 16- and 18-carbon fatty acids are the most common. In animal cells, cholesterol is found dispersed in varying degrees throughout cell membranes, where it confers a ...
The Plasma Membrane
... What does it look like? • It’s composed of a phospholipid bilayer – Polar heads (phosphate) on the outside • hydrophilic ...
... What does it look like? • It’s composed of a phospholipid bilayer – Polar heads (phosphate) on the outside • hydrophilic ...
SYNAPTIC TRANSMISSION
... How does the impulse travel from one neuron to another? How does an impulse travel from a neuron to a muscle or gland (effector)? How can they do this when they are not physically connected (there’s a GAP)? ...
... How does the impulse travel from one neuron to another? How does an impulse travel from a neuron to a muscle or gland (effector)? How can they do this when they are not physically connected (there’s a GAP)? ...
Link to DOC - VCU Department of Physiology and Biophysics
... capped by a negatively-charged heteropolymeric O antigen (O-Ag). Initial translocation of trisaccharide O-Ag subunits bound to undecaprenyl pyrophosphate, from the inner leaflet to the outer leaflet of the inner membrane (IM), is believed to be mediated by the O-Ag flippase Wzx, an integral IM prote ...
... capped by a negatively-charged heteropolymeric O antigen (O-Ag). Initial translocation of trisaccharide O-Ag subunits bound to undecaprenyl pyrophosphate, from the inner leaflet to the outer leaflet of the inner membrane (IM), is believed to be mediated by the O-Ag flippase Wzx, an integral IM prote ...
SNARE (protein)
SNARE proteins (an acronym derived from ""SNAP (Soluble NSF Attachment Protein) REceptor"") are a large protein superfamily consisting of more than 60 members in yeast and mammalian cells. The primary role of SNARE proteins is to mediate vesicle fusion, that is, the fusion of vesicles with their target membrane bound compartments (such as a lysosome). The best studied SNAREs are those that mediate docking of synaptic vesicles with the presynaptic membrane in neurons. These SNAREs are the targets of the bacterial neurotoxins responsible for botulism and tetanus.