Would it be possible for small ions to passively diffuse (simple diffusion) across a selectivelypermeable membrane? Why?A Yes, because ions are highly non-polar in natureB Yes, because ions are highly polar in natureNo, because it needs the aid of transport proteins to cross the membraneNo, because not only transport proteins but also metabolic energy from ATP are needed totransport ions across the plasma membrane

The plasma membrane is a selectively permeable membrane that regulate the transportation of…

Answered: Would it be possible for small ions to…

Human Physiology: From Cells to Systems (MindTap Course List)

9th Edition

ISBN:9781285866932

Author:Lauralee Sherwood

Publisher:Lauralee Sherwood

Chapter3: The Plasma Membrane And Membrane Potential

Section: Chapter Questions

Problem 1TAHL: Which of the following methods of transport is being used to transfer the substance into the cell in...

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Assume that a membrane permeable to Na+ but not to Cl- separates two solutions. The concentration of sodium chloride on side 1 is higher than on side 2. Which of the following ionic movements would occur? a. Na+ would move until its concentration gradient is dissipated (until the concentration of Na+ on side 2 is the same as the concentration of Na+ on side 1). b. Cl- would move down its concentration gradient from side 1 to side 2. c. A membrane potential, negative on side 1, would develop. d. A membrane potential, positive on side 1, would develop. e. None of the preceding is correct.
The principal force driving movement in diffusion is______. a. temperature b. particle size c. concentration gradient d. membrane surface area
Which of the following statements about passive processes of membrane transport is false? cellular energy is not required substances move along its concentration gradient all require the aid of proteins during transport a and b a and c
How is active transport different from simple diffusion? Both active transport and simple diffusion transport molecules against the concentration gradient. In active transport, molecules are moved down the concentration gradient; on the B contrary, molecules to be transported in simple diffusion are moved against the concentration gradient. In active transport, molecules are transported with the aid of transport proteins; on the © other hand, molecules to be transported in simple diffusion do not need transport proteins. In active transport, molecules that are transported does not need metabolic energy; in contrast, molecules transported in simple diffusion need metabolic energy.
The comparison of the simple diffusion, facilitated diffusion and active transport are shown in the table below: * Which comparisons are TRUE? Simple Diffusion Facilitated Diffusion Active Transport I Require ATP Does not require ATP Require ATP II Does not involve a Involve a transport Involve a transport transport protein protein protein From a region of higher III From a region of higher concentrațion of substance to a region of lower concentration of From a region of lower concentration of concentration of substance to a region of lower concentration of substance. substance to a region of higher concentration of substance. substance. O I and II only I and III only O Il and III only O I, Il and III
Which of the following statements about active processes of membrane transport is true? cellular energy is required substances move against its concentration gradient all requires the aid of proteins during transport a and b a, b, and c
The uneven distribution of ions across the plasma membrane is regulated, in part, by transport proteins. The result is a net negative charge on the inside of the plasma membrane and a net positive charge on the outside of the plasma membrane. How doyou explain the net negative charge inside the plasma membrane when the predominant intracellular ion is K+?
In facilitated diffusion and active transport, how do transport proteins affect the rate of movement of molecules across the phospholipid selectively permeable membrane? A Transport proteins decrease the rate of movement of molecules. B Transport proteins stop the rate of movement of molecules. © Transport proteins increase the rate of movement of molecules. Transport proteins ensures all molecules may pass the membrane simultaneously.
Which of the following statements are correct? P. Plasma membrane is highly impermeable to all charged molecules Q. All membrane transport proteins so far known, are transmembrane multipass proteins R. Ionophores operate by shielding the charge of the transported ion so that it can penetrate the hydrophobic interior of the lipid bilayer. S. Na+-K+ ATPase exchanges equal numbers of Na+ and K+ ions in each pumping cycle P and Q R and S P and S Q and R
Below are three statements - two of which are truths and one is a lie. Which of the following statements is a lie? Select one: a.The primary active transport uses external chemical energy. b.The sodium-potassium pump which is an example of primary active transport is considered as the most important pump. c. In primary active transport, the energy is derived secondarily from energy that has been stored in the form of ionic concentration differences between the two sides of a membrane.
1) You are studying a transport protein. It appears to bind temporarily to the molecule to be transported. During normal transport, no energy is expended. The addition of a particular molecule that closely resembles the normally transported molecule inhibits transport. An increase in the concentration of the normally transported molecule in the presence of a constant concentration of the inhibitor increases the rate of transport. What kind of transport is described? 2) What are peripheral membrane proteins?
Which of the following will decrease diffusion rate (a.k.a. rate of flux) of a particle across the plasma membrane? O Applying a polymer that makes the particle more hydrophobic. O Changing the diameter of the particle from 1uM to 10uM. O Both of these will decrease diffusion rate ONeither of these will decrease diffusion rate

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