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A selectively permeable membrane is most often attributed to the cell membrane (plasma membrane) of cells. It is constructed of nonpolar phospholipids that will not dissolve many substances, like ions or large molecules. There are carrier proteins embedded in the membrane that allow only certain substances through.
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∙ 15y ago
Wiki User
∙ 12y agoIf you mean an analogy you could say that a semi permeable membrane is like a net or the mesh on a screen door.
Wiki User
∙ 11y agoThe cell membrane of animal cells and the loop of henle in the kidney ..
Wiki User
∙ 13y agoCell walls are semi-permeable membranes.
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Two difference between osmosis and diffusion?
1. higher concentration to lower concentration 2. through a semi-permeable membrane
What are the conditions required for osmosis to occur?
The following conditions are required for osmosis to occur: 1) A selectively-permeable membrane 2) Concentration difference
What are 2 examples of mutagen?
smoking
Osmosis always involves what?
Osmosis refers to the flow of water along the water potential through a selectively/differentially permeable membrane/tubing due to a difference in water potential. Thus, it always involves 1) a selectively/differentially permeable membrane 2) difference in water potential(related to concentration gradient) 3)flow of water.
What are two examples of some manufactured products made from mixtures?
2 examples for this questions are Glass and Steal
Is mitochondria have 2 membranes?
yes, inner and outer membranes
Substances that can pass through cell membranes by diffusion include?
depends on type of membrane 1) semi-permeable membrane - allows only solvent molecule to pass ex. parchment paper 2) permeable membrane - allows both solvent and solute molecules to pass ex. filter paper 3) selectively permeable membrane - allows solvent molecules and some of selected solute molecules to pass ex. plasma membrane
What are permeable and impermeable rocks?
Permeability is a measure of how well a porous media transmits a fluid. It has nothing to do with the fluid itself. It is measure in (length)2. The Hydraulic Conductivity is a measure of how easily water moves through the porous media. It depends on the permeability of the matrix, but also is a function of the fluid. It is a measure of (length)/(time)
Definition of impermeable membrane?
im·per·me·a·ble   [im-pur-mee-uh-buhl] Show IPA adjective1.not permeable; impassable.2.Chemistry, Geology . (of porous substances, rocks, etc.) notpermitting the passage of a fluid through the pores,interstices, etc.
How many membranes are in the chloroplasts?
Nucleus is surrounded by a double membrane.
How many membranes is the chloroplast surrounded by?
2
Why is it necessary to have a cell membrane on a plant cell?
The cell surface membrane is partially permeable membrance that is made up of double phospholid layers comprising of 1. lipids 2. fats 3. proteins 4. phosphate groups. This is therefore needed for the control of substances in and out of the cells (: margaret
Will the size of an unboiled strip of potato increase when placed in distilled water for 2 hours?
Yes, because the distilled water has higher water potential as compared the the strip potato, so water will enter the potato by osmosis, through a partially permeable membrane, causing it to increase in size (:
What does it mean when you say plasma membrane is permeable?
A porous membrane has openings scattered on its surface of various size and frequency. This means that such membranes allow various substances to pass through. Any molecules that are larger than the membrane's openings will not pass through.
Is endoplasmic reticulum bounded by 2 membranes?
yes
How many membranes enclose the contents of the chloroplast?
2
How many membranes does a cell membrane have?
2 dogg
