Active transport of a substance across a membrane requiresa. a gradient b. the expenditure of ATP c. water d. diffusion

Q: Why does the plasma membrane of a cell present a barrier to the movement of electrolytes through it?…

A: Introduction - The plasma membrane is a thin lipid bilayer that surrounds and protects the cell's…

Q: Water moves molecules passively across a cell membrane by: a)osmosis

A:

Q: Molecules in a fluid diffuse over time because A. they are pumped toward areas of higher…

A: Need to find why molecules in a fluid diffuse over time from the four given options.

Q: What variable(s) influence(s) whether a nonpolar molecule can move across a membrane by passive…

A: All the above choices are correct as all these variables influenced a non polar molecule to move…

Q: Match the definitions with the words: Direct Diffusion, Facilitated Transport, Active Transport a)…

A: The one primary distinction between faciliated and active transport  active transport needs energy,…

Q: The rate of diffusion increases if thea. concentration gradient decreases.b. temperature of a…

A: The process of diffusion is defined as the movement of solutes from its higher concentration to…

Q: d) hypertonic

A:

Q: The principal force driving movement in diffusion is __________. a. temperature b. particle size c.…

A: Diffusion is the process that helps in the movement of substances in and out of the cells and it…

Q: Water moves via osmosis _________. a. throughout the cytoplasm b. from an area with a high…

A: All the cells have a membrane surrounding their organelles which allow support, protection and…

Q: Cells transport sodium ions out of the cell against the sodium concentration gradient. This is an…

A: The sodium ions move in and out of cell using sodium pump mechanism, against the concentration…

Q: Differentiate between  (a) Osmotic Pressure and Osmotic Potential(b) Imbibition and Diffusion

A: The plasma membrane accomplishes various primary functions that are required for the cell. Some are…

Q: When a cell is placed in a hypertonic solution, Select one: O A. Water exits the cell toward the…

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Q: The sodium-potassium pump helps to maintain electrolyte gradients through use of ATP. Which of the…

A: Introduction : The Sodium– Potassium Pump Are Present In Many Cells On The Plasma Membrane Or Cell…

Q: Movement of cell against concentration gradient is called: A. osmosis B. active transport…

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Q: Distinguish between passive and active transport.

A: These are the process of membrane transport through which the regulation of solutes, gases,…

Q: Diffusion is the movement of substances A. from a region of high to low concentration B. from a…

A: Diffusion is referred to the phenomenon where molecules undergo movement when there is a…

Q: When a cell is placed in a hypertonic solution, Select one: O A Water exits the cell toward the area…

A: The measure of osmotic gradient or water potential gradient between two different solutions…

Q: Facilitated diffusion differs from active transport in thatfacilitated diffusiona. expends no ATP.b.…

A: The cell membrane is semipermeable and allows only certain molecules transportation from in and out…

Q: The movement of water across the plasma membrane of a cell is facilitated bya. aquaporins.b.…

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Q: Which is common between active transport and facilitated diffusion A Both uses metabolic energy B…

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Q: Movement of phospholipids to opposite sides is calleda) Facilitated diffusionb) Lateral diffusionc)…

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Q: Differentiate between the following:(a) Diffusion and Osmosis(b) Transpiration and Evaporation

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Q: Osmosis, the diffusion of water is distinct from the diffusion of oxygen because a) oxygen is a…

A: Osmosis, the diffusion of water is distinct from the diffusion of oxygen because?

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Q: Transport of a substance across membranes that requires no direct input of energy is referred to as…

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Q: In which situation would passive transport not use a transport protein for entry into a a. water…

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Q: For a transport process, a linear plot of of V vs [S] indicates the transport is: a. undetermined O…

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Q: One substance flows down its concentration gradient, and the energy is harnessed to move another…

A: Active transport is a type of transport in which a cell expends energy in the form of ATP to move a…

Q: substances be transported across a membrane against their concentration gradient?

A: Some membrane proteins are ATP-dependent carrier molecules.

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Q: Which of the following transport mechanisms requires energy? A) facilitated diffusion B) osmosis C)…

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Q: Define the following terms: a. semipermeable membrane b. hypotonic c. hypertonic d. crenation e.…

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Q: A hypertonic glucose solution A. Causes cell hemolysis…

A: The solution is a fluid combination of two different components in which the minor segment is solute…

Q: he principal force driving movement in diffusion is: a) gravity b) random movement of particles in…

A: Diffusion is defined as the movement of particles from region of higher concentration to a lower…

Q: lease answer the following multiple choice question:

A: There are two components:  Moving UP the concentration gradient Use of Proteins  to transport…

Q: Which of the following processes requires protein carriers to move materials up their concentration…

A: a. active transport.

Q: n diffusion, substances move from areas of (greater) (lesser) to (greater) lesser concentrations.

A: In diffusion, the substances moves from areas of greater concentration to areas of lesser…

Q: Which energy is needed to drive the transport of molecules via active transport? A Kinetic energy of…

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Q: During diffusion, what happens when the concentration of solutes on both sides of the biological…

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Q: Which of the following processes is depicted in the diagram? ++++ ++++ ++++ ++++ ++ Low + + High + O…

A: The movement of chemicals across a biological membrane from a high-concentration location to a…

Q: Membrane proteins play the following roles: Select one: a. All of the answers b. Enzymes c. Cell…

A: Membrane proteins are the proteins that are present in the cell/organelles membranes. Depending on…

Q: Whether in a gas, a liquid, or a semisolid, diffusion always occurs a). at the same rate. b). from…

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Q: Facilitated diffusion moves objects from... A. a LOWER concentration area to a HIGHER concentration…

A: Water water soluble substances and gaseous components are transported across the cells by various…

Q: 1. Substances move through biological membranes against concentration gradients via: a. Simple…

A: *simple osmosis is spontaneous passage  of water through a semipermeable membrane  * Active…

Q: A. What is the difference between: 1. a. Passive transport- b. Active Transport- 2. a. Facilitated…

A: Active or passive transport is the transport process that is movement of molecules. Membrane…

Q: Matter can leave a cell by any of the following means excepta. active transport.b. pinocytosis.c. an…

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Q: Choose the passive process from the list below.  A. Water moving through the membrane  B. Sodium…

A: Passive transport is a process by which an ion or molecule passes through a cell wall via a…

Q: The greater the magnitude of the concentration gradient:   a.  the more rapid the rate of…

A: Concentration gradient refers to the magnitude of the difference between the concentration of two…

Osmosis

In simple words, osmosis is the slow, gradual movement of a liquid through a membrane. But there are nuances to this process. For instance, there has to be an imbalance in the distribution of solute in the liquid on either side of the membrane, which has to be semipermeable. The liquid in the region with a lower solute concentration moves to the region with a higher concentration, thereby displacing the solution in the process. The objective is to equalize the concentration of molecules on both sides of the membrane; the displacement of liquid can be viewed as a byproduct of this equalization. Since there is no energy required to carry osmosis, it is considered a passive process.