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The meaning of TRAVERSE is to go or travel across or over. How to use traverse in a sentence. to go or travel across or over; to move or pass along or through; to make a study of : examine…
- Selective Permeability Definition
- Structure of Selectively Permeable Membranes
- Function of Selective Permeability
- Proteins Mediating Selective Permeability
- Active and Passive Transport Across Selectively Permeable Membranes
- Related Biology Terms
- Quiz
Selective permeability is a property of cellular membranes that only allows certain molecules to enter or exit the cell. This is important for the cell to maintain its internal order irrespective of the changes to the environment. For example, water, ions, glucose and carbon dioxide may need to be imported or exported from the cell depending on its...
Cell membranes are not easily visualized using light microscopes. Therefore, hypotheses about their existence only arose in the late 19th century, nearly two hundred years after the first cells has been observed. At various points, different models have attempted to explain how the structure of the membrane supports its function. Initially, the mem...
Selective permeability is crucial for creating a distinctly different environment inside the cell as compared to the extracellular matrix. It is equally relevant in maintaining the integrity of various organelles inside the cell. Each organelle is a small compartment with a specialized function, requiring optimal concentrations of proteins, small m...
Selective permeability is mediated by special proteins that traverse the cellular membrane. They are involved in the movement of ions and small molecules as well as large polymers such as RNA and proteins. This movement can be passive or active – with or without the expenditure of energy. For instance, ions are transported across selectively permea...
Passive transport is of two types – free diffusion or facilitated diffusion – and movement is always along a concentration gradient. Free diffusion is seen most often in the movement of uncharged molecules such as carbon dioxide or ethanol across the cell membrane, without the involvement of any other molecules. Facilitated diffusion requires the p...
Electron Microscope– A microscope that uses a beam of electrons to illuminate the sample achieving extremely high magnification and resolution.Extracellular Matrix– Non-cellular component of tissues and organs composed of water, proteins and polysaccharides, which provides physical, biomechanical and biochemical support to cells.Hydrophile– A molecule that is attracted to water.Ran– A small protein that directs transport across the nuclear membrane based on its binding to guanosine dinucleotides and trinucleotides.1. Which of these proteins is involved in nuclear transport? A. Importin B. Exportin C. RanGTP D.All of the above 2. Which of these molecules diffuses freely through small pores on the cell membrane? A. Glucose B. ATP C. Water D.None of the above 3. Choose the molecule that does NOT need active transport to move across the cell membrane. A. Sodium ...
What does the noun traverse mean? There are 37 meanings listed in OED's entry for the noun traverse, 16 of which are labelled obsolete. See ‘Meaning & use’ for definitions, usage, and quotation evidence. traverse has developed meanings and uses in subjects including. law (Middle English) fortification (early 1500s) fencing (mid 1500s ...
traverse is of multiple origins. Apparently partly a variant or alteration of another lexical item. Apparently partly formed within English, by conversion. Etymons: a-travers adv.; traverse adj.
TRAVERSE definition: 1. to move or travel through an area: 2. to move or travel through an area: 3. to move or travel…. Learn more.
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The verb 'traverse' has its roots in the Old French word 'traverser,' which is derived from the Vulgar Latin term 'transversare,' a verb form of 'transversus.' 'Transversus' is Latin for 'across' or 'crosswise,' and it's formed from 'trans,' meaning 'across,' and 'vertere,' meaning 'to turn.'. This etymology is quite fitting as 'traverse ...
