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Mechanisms that allow movement of materials across a plasma membrane include?
Wiki User
โ 8y ago
Passive transport (does not require ATP energy): osmosis, diffusion, facilitated diffusion
Active transport (requires ATP energy):
*primary active transport, e.g. sodium potassium pump, calcium pump, proton pump
*secondary active transport, e.g. in ATP synthase
*edocytosis and exocytosis
Wiki User
โ 8y ago
Wiki User
โ 9y agoThere are a range of different methods. Diffusion can occur directly through the phospholipid bilayer and is a passive process. Facilitated diffusion is also a passive process that occurs through intrinsic hydrophilic channel or carrier proteins. Osmosis is a special case of diffusion that involves the movement of water molecules only. Active transport is an energy-requiring process where carrier proteins are used to transport substances from a region of low concentration to a region of high concentration (against a concentration gradient). The cell obtains and excretes material in bulk by the processes of endocytosis (phagocytosis and pinocytosis) and exocytosis respectively.
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What materials crossed the membrane and why did they cross?
Materials that can cross the cell membrane include small non-polar molecules like oxygen and carbon dioxide, as well as small polar molecules like water. These molecules can freely pass through the lipid bilayer of the membrane due to their small size and compatibility with the hydrophobic environment of the lipid tails. However, larger molecules and charged ions require specific protein channels or transporters to cross the membrane.
Microbial virulence factors?
The virulence factor list include capsules, fimbriae, outer membrane proteins, techoic acids, protein A, and m protein. Virulence factors are factors that allow pathogens to avoid host defense mechanisms and adversely affect the host.
Cell membrane proteins do not include?
lipids
Has membrane bound organells?
Eukaryotic cells have membrane bound organelles. These in include the nucleus and mitochondria.
What are the characteristic of cell membrane?
The cell membrane is selectively permeable. It is also very flexible and contains many different substances within it and on it, such as various proteins, lipids, cholesterol, etc, nicknaming it the fluid mosaic model.
What is the movement of materials through a cell membrane?
Movement of substances into and out of cells include passive mechanisms that do not require cellular energy (diffusion, facilitated diffusion, osmosis, and filtration) and active mechanisms that use cellular energy (active transport, endocytosis,and exocytosis).
What is the circulatory system responsible?
The circulatory system is responsible for the movement of materials throughout the body. These materials include nutrients, wastes, oxygen, hormones, and immune materials.
What materials crossed the membrane and why did they cross?
Materials that can cross the cell membrane include small non-polar molecules like oxygen and carbon dioxide, as well as small polar molecules like water. These molecules can freely pass through the lipid bilayer of the membrane due to their small size and compatibility with the hydrophobic environment of the lipid tails. However, larger molecules and charged ions require specific protein channels or transporters to cross the membrane.
What are the causes of alcohol-related neurologic disease?
The way in which alcohol destroys muscle tissue is still not well understood. Proposed mechanisms include muscle membrane changes affecting the transport of calcium, potassium, or other minerals; impaired muscle energy.
What is the carrying away of weathered materials?
Weathered material may be moved by some form of transportation, which may include transportation through an agent of erosion, but may also include transportation through mass movement.
Microbial virulence factors?
The virulence factor list include capsules, fimbriae, outer membrane proteins, techoic acids, protein A, and m protein. Virulence factors are factors that allow pathogens to avoid host defense mechanisms and adversely affect the host.
Cell membrane proteins do not include?
lipids
All cells are surrounded by a(n)?
A Cell Membrane: The bi-lipid-layer Cell Membrane. Plant Cells include an exterior [cellulosic] Cell Wall while animal Cells include an exterior glyco-callyx [sugar-protein] Cell Coat.
Identify at least five ways by which a substance may enter the cell?
Osmosis, diffusion, facilitated diffusion, active transport, passive transport.
Has membrane bound organells?
Eukaryotic cells have membrane bound organelles. These in include the nucleus and mitochondria.
What two processes transport materials through the semi-permable membrane?
Considering the cell membrane itself, processes include diffusion, osmosis, facilitated diffusion (passive processes that do not require energy) and active transport (an active process that requires energy).
The mechanisms involved with the regulation of cardiovascular function include?
turbulence volume and cardiac output
