membrane transport class notes
... – Do not like water ( think of oil + water) – the “tails” – The “heads” are polar molecules ...
... – Do not like water ( think of oil + water) – the “tails” – The “heads” are polar molecules ...
Chapter 5 Handout - Prep for Bio 010-51
... a. The cell is the smallest unit of life. Each cell is surrounded by a thin plasma membrane, which isolates the cell’s contents from the external environment. The Structure of the Plasma Membrane The overall organization of membranes can be described as proteins floating in a double layer of lipids. ...
... a. The cell is the smallest unit of life. Each cell is surrounded by a thin plasma membrane, which isolates the cell’s contents from the external environment. The Structure of the Plasma Membrane The overall organization of membranes can be described as proteins floating in a double layer of lipids. ...
Section 1.2: Microscopes allow us to see inside the cell
... scientists to see living cells Scanning Electron Microscopes (SEM)produce a 3-D image of a cell’s surface Transmission Electron Microscope (TEM)produce a 2-D image of the inside of a cell **SEM and TEM do not allow scientists to see living cells, but they do magnify objects up to a million times** ...
... scientists to see living cells Scanning Electron Microscopes (SEM)produce a 3-D image of a cell’s surface Transmission Electron Microscope (TEM)produce a 2-D image of the inside of a cell **SEM and TEM do not allow scientists to see living cells, but they do magnify objects up to a million times** ...
How does stuff get in and out of cells?
... • They do this via diffusion, osmosis, etc Facilitated Diffusion ...
... • They do this via diffusion, osmosis, etc Facilitated Diffusion ...
ell notes - Mathomania
... Plastids: These are somewhat similar to mitochondria; in appearance. Plastids are found in plant cells. They are of two types, chromoplast and leucoplast. Colourful plastids are called chromomplast and colourless plastids are called leucoplast. Chloroplast is green in colour and is found in green pa ...
... Plastids: These are somewhat similar to mitochondria; in appearance. Plastids are found in plant cells. They are of two types, chromoplast and leucoplast. Colourful plastids are called chromomplast and colourless plastids are called leucoplast. Chloroplast is green in colour and is found in green pa ...
Document
... b. ________ like Na+, Ca+, etc _______________________________________, so they must travel through proteins channels c. ____________________________________________________________________ d. Some channels are always open, some have gate e. Gates open from ___________________: stretching of cell me ...
... b. ________ like Na+, Ca+, etc _______________________________________, so they must travel through proteins channels c. ____________________________________________________________________ d. Some channels are always open, some have gate e. Gates open from ___________________: stretching of cell me ...
Oliver Bawmann week 6
... A protein pump pushes molecules up and thus against its concentration gradient. however to do this the proteins require energy in the form of none other than ATP. Transporter proteins bind ATP directly and use the energy of its hydrolysis to drive active transport. Others use the energy already sto ...
... A protein pump pushes molecules up and thus against its concentration gradient. however to do this the proteins require energy in the form of none other than ATP. Transporter proteins bind ATP directly and use the energy of its hydrolysis to drive active transport. Others use the energy already sto ...
What is a Cell
... general term for the various types of active transport that move particles into a cell by enclosing them in vesicle made out of plasma membrane. There are variations of endocytosis, but all follow the same basic process. First, the plasma membrane of the cell invaginates (folds inward), forming a po ...
... general term for the various types of active transport that move particles into a cell by enclosing them in vesicle made out of plasma membrane. There are variations of endocytosis, but all follow the same basic process. First, the plasma membrane of the cell invaginates (folds inward), forming a po ...
Cell Transport - Solon City Schools
... • 1) Sugars and amino acids (large molecules) • 2) ions (polar) (ex. Na+ , K+) • *These molecules use facilitated diffusion (w/ help from transport proteins like channel or carrier proteins) (no energy used) to cross the membrane or they use active transport (requires energy) ...
... • 1) Sugars and amino acids (large molecules) • 2) ions (polar) (ex. Na+ , K+) • *These molecules use facilitated diffusion (w/ help from transport proteins like channel or carrier proteins) (no energy used) to cross the membrane or they use active transport (requires energy) ...
Brief Review of Membrane Structure and Osmosis Cells and cell
... Substances that cross the membrane through specific channels In contrast, ions such Na+ or Cl- are unable to cross the membrane freely. Special channels are required for these substances to cross the cell membrane. These channels are proteins imbedded in the membrane. When ions are passing through ...
... Substances that cross the membrane through specific channels In contrast, ions such Na+ or Cl- are unable to cross the membrane freely. Special channels are required for these substances to cross the cell membrane. These channels are proteins imbedded in the membrane. When ions are passing through ...
- Toolbox Pro
... What things can get in a window screen? A screen is similar to the cell membrane in a cell. ...
... What things can get in a window screen? A screen is similar to the cell membrane in a cell. ...
ap biology
... 1. Given an animal cell with pressure = 0, solute potential = -2, and a solution surrounding the cell with pressure = 0, and solute potential = 0. The cell membrane is permeable to both water and solute. a. Solute concentration is initially higher here: ________________ b. Water potential is initial ...
... 1. Given an animal cell with pressure = 0, solute potential = -2, and a solution surrounding the cell with pressure = 0, and solute potential = 0. The cell membrane is permeable to both water and solute. a. Solute concentration is initially higher here: ________________ b. Water potential is initial ...
Flagellar Movement Although the precise mechanism by which
... increases the likelihood that it will move randomly in another direction, away from a repellant. Movement in response to a stimulus is termed taxis. The stimulus may be either light (phototaxis) or a chemical (chemotaxis). Movement toward a favorable stimulus is positive taxis, whereas movement away ...
... increases the likelihood that it will move randomly in another direction, away from a repellant. Movement in response to a stimulus is termed taxis. The stimulus may be either light (phototaxis) or a chemical (chemotaxis). Movement toward a favorable stimulus is positive taxis, whereas movement away ...
ANTIMICROBIAL AGENT (PENGAWET)
... associated with respiration . Lethal dose of nitrites in human is 2 – 6 g, prolonged ingestion nitrite cause methemioglobinemia, that is, excessive production of abnormal mioglobin. ...
... associated with respiration . Lethal dose of nitrites in human is 2 – 6 g, prolonged ingestion nitrite cause methemioglobinemia, that is, excessive production of abnormal mioglobin. ...
Cell Membranes
... permeable): Allows some molecules in and keeps other molecules out b. Take cell membrane quiz! a. http://www.wisconline.com/objects/ViewObject.aspx?I ...
... permeable): Allows some molecules in and keeps other molecules out b. Take cell membrane quiz! a. http://www.wisconline.com/objects/ViewObject.aspx?I ...
Cells - My Teacher Pages
... All other life forms are made up of one or more eukaryotic cells These are larger and more complex than prokaryotic cells Eukaryotes are distinguished by the presence of a true nucleus The cytoplasm contains organelles Many organelles have membranes as boundaries These compartmentalize the interio ...
... All other life forms are made up of one or more eukaryotic cells These are larger and more complex than prokaryotic cells Eukaryotes are distinguished by the presence of a true nucleus The cytoplasm contains organelles Many organelles have membranes as boundaries These compartmentalize the interio ...
Phylum Apicomplexa
... 2. Relatively rigid pellicle and more or less fixed shape 3. Distinct cytostome (mouth) Structure 4. Dimorphic nuclei, typically larger macronuclei and one more smaller micronuclei ...
... 2. Relatively rigid pellicle and more or less fixed shape 3. Distinct cytostome (mouth) Structure 4. Dimorphic nuclei, typically larger macronuclei and one more smaller micronuclei ...
Chapter 6 PowerPoint
... • Localized contraction brought about by actin and myosin also drives amoeboid movement • Pseudopodia (cellular extensions) extend and contract through the reversible assembly and contraction of actin subunits into microfilaments ...
... • Localized contraction brought about by actin and myosin also drives amoeboid movement • Pseudopodia (cellular extensions) extend and contract through the reversible assembly and contraction of actin subunits into microfilaments ...
Mycelium (n) - Madeira City Schools
... Septa – A cross wall that divides a fungal hypha into cells. Pores are large enough to allow ribosomes, mitochondria, and nuclei to flow from cell to cell. Coenocytic fungi – a fungus that lacks septa. It’s body is made up of a conitnuous cytoplasmic mass that may contain hundreds or thousands of nu ...
... Septa – A cross wall that divides a fungal hypha into cells. Pores are large enough to allow ribosomes, mitochondria, and nuclei to flow from cell to cell. Coenocytic fungi – a fungus that lacks septa. It’s body is made up of a conitnuous cytoplasmic mass that may contain hundreds or thousands of nu ...
This organelle looks like a stack of
... Name two of the parts of the cell theory All living things are made of cells; Cells are the basic unit of structure & function in living things; All cells are produced from existing cells ...
... Name two of the parts of the cell theory All living things are made of cells; Cells are the basic unit of structure & function in living things; All cells are produced from existing cells ...
Monday - Houston ISD
... determines whether a determines whether a cell is prokaryotic or cell is prokaryotic or eukaryotic eukaryotic ...
... determines whether a determines whether a cell is prokaryotic or cell is prokaryotic or eukaryotic eukaryotic ...
Microbiology
... learn the following: the names of different cell parts what function each part has (We will use the analogy of a shopping mall as our example of a cell.) ...
... learn the following: the names of different cell parts what function each part has (We will use the analogy of a shopping mall as our example of a cell.) ...
Cell Boundaries
... Cell walls are outside cell membranes. Most cell walls have enough space to allow water, oxygen, carbon dioxide, and other substances through. The cell wall’s main function is to provide support and protection for the cell. ...
... Cell walls are outside cell membranes. Most cell walls have enough space to allow water, oxygen, carbon dioxide, and other substances through. The cell wall’s main function is to provide support and protection for the cell. ...
Cytoplasmic streaming
Cytoplasmic streaming, also called protoplasmic streaming and cyclosis, is the directed flow of cytosol (the liquid component of the cytoplasm) and organelles around large fungal and plant cells through the mediation of actin. This movement aids in the delivery of organelles, nutrients, metabolites, genetic information, and other materials to all parts of the cell. Cytoplasmic streaming occurs along actin filaments in the cytoskeleton of the cell.Cytoplasmic streaming was first discovered in the 1830s. The scientific breakthrough assisted scientists in developing an understanding of the different roles of cells and how they function as the basic operating systems of life.This process occurs through the operation of motor proteins called myosins.These proteins use energy of adenosine triphosphate (ATP) to act as a molecular motor, which slides along actin filaments. This works in a manner that tows the organelles and other cytoplasmic contents in the same direction. Myosin proteins consist of two conjoined proteins. If one protein remains attached to the substrate, the substance acted upon by the protein, such as a microfilament, has the ability to move organelles through the cytoplasm.The green alga genus Chara and other genera in the Division Charophyta, such as Coleochaete, are thought to be the closest relatives of land plants. These haploid organisms contain some of the largest plant cells on earth, a single cell of which can reach up to 10 cm in length. The large size of these cells demands an efficient means to distribute resources, which is enabled via cytoplasmic streaming.Cytoplasmic streaming is strongly dependent upon intracellular pH and temperature. It has been observed that the effect of temperature on cytoplasmic streaming created linear variance and dependence at different high temperatures in comparison to low temperatures. This process is complicated, with temperature alterations in the system increasing its efficiency, with other factors such as the transport of ions across the membrane being simultaneously affected. This is due to cells homeostasis depending upon active transport which may be affected at some critical temperatures.In plant cells, chloroplasts may be moved around with the stream, possibly to a position of optimum light absorption for photosynthesis. The rate of motion is usually affected by light exposure, temperature, and pH levels.In reference to pH, because actin and myosin are both proteins, strong dependence on pH is expected. The optimal pH at which cytoplasmic streaming is highest, is achieved at neutral pH and decreases at both low and high pH.The flow of cytoplasm may be stopped by:Adding Lugol's iodine solutionAdding Cytochalasin D (dissolved in dimethyl sulfoxide)↑ ↑ ↑ ↑ ↑ ↑