During passive transport, substances will move across a selectively permeable membrane until… explain why    A. There is no longer any energy to be used   B. All solutes reach the other side of the membrane    C. There is no more room inside of the cell   D. Equilibrium is reached

Q: Among the membrane transporters, the channels require energy and therefore are involved in active…

A: Channel protein form pores through membrane allowing the free diffusion of any molecule of the…

Q: Which of these processes are membrane-crossing mechanisms that require no energy input? Select all…

A: Transport mechanisms are of two types - active transport that requires energy expenditure and…

Q: Which of the statements about diffusion are true? Select all that apply.     A. Solutes diffuse from…

A: The movement of particles is dependent on multiple factors including the charge on particle,…

Q: If a cell is hypertonic to its environment, what may happen as a result of osmosis? A. its volume…

A: Introduction  Plants cells maintains the Turgor pressure in order to control the cell shape. Turgor…

Q: Cell membranes can maintain a difference in electrical charge between the inte- rior of the cell and…

A: Cell membrane is negatively charged from inside in comparison to outside. But at the time of impulse…

Q: Active transport of a substance across a membrane requiresa. a gradient b. the expenditure of ATP c.…

A: Cellular transport is the movement of molecules and ions across the cell membrane. Cells have two…

Q: Which of the following statements is true about active transport? A. The transported species always…

A: Active transport is a mode of transport of molecules against the concentration gradient using…

Q: When a cell is placed in a hypotonic solution,a. solute exits the cell to equalize the concentration…

A: Hypotonic solution means where the solute concentration is less and solvent concentration is more.…

Q: A concentration gradient is used as an energy source for____________. Select one: a. Secondary…

A: The movement of molecules occurs across plasma membrane in a regulated manner.

Q: What will happen if a cell with a solute potential of -0.4 MPa and a pressure potential of 0.2 MPa…

A: Answer- Water potential is calculated by adding solute and pressure potential. In this case the…

Q: Cells move polar molecules across the cell membrane against a concentration gradient using…

A: Structure and function of cells determined by internal vs. external concentrations of molecules.  A…

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: When a cell is placed in a hypertonic solution,a. solute exits the cell to equalize the…

A: Answer is b.) water exits the cell toward the area of lower solute concentration.

Q: The logic/reason behind movement of only the red molecules and not the blue across the membrane is?…

A: Plasma membrane is the outer covering of the cell. It is made up of phospholipid bilayer.

Q: Which of the following will likely result if the concentration of electrolytes outside the cell is…

A: Osmosis is the movement of solvent molecules across a semi-permeable membrane from its high…

Q: Active transport pumps are used to move sodium ions across the membranes of gill cells in freshwater…

A: Active Transport:  Active transport is the movement of molecules across a cell membrane across a…

Q: If magnesium ions are in higher concentration outside the cell, they would move into the cell by the…

A: Movement across the membrane happens through two pathways. Active mechanism and passive mechanism.…

Q: Match the definition on the left with the term on the right. a. Passive transport 1. Large wastes or…

A: Diffusion is the process of movement of material across the plasma membrane where the molecules will…

Q: Our cells need glucose for energy. When blood glucose is low, glucose must still be moved into our…

A: Transportation is a necessary, natural, and physiological activity that happens in all higher…

Q: During osmosis, water moves across a selectively permeable membrane toward a solution with: A. The…

A: The movement of ions and molecules across the cell membranes or through the bloodstream is known as…

Q: Initial Extracellular fluid Solute Plasma membrane Cytoplasm В

A: Ans : The panel D represents the situation in which the concentration gradient of solute is…

Q: Which of the following processes includes all the others?(A) osmosis(B) diffusion of a solute across…

A: Plasma membrane is the outermost layer of the cell that is chiefly in transportation of various…

Q: What is the purpose of the "sodium/potassium pump" A. to perform endocytosis. B. to move sodium and…

A: The plasma membrane is selective barrier of the cell that regulates the transportation of different…

Q: Which of the following statements about "leak channels" in the plasma mem- brane is correct? A.…

A: Introduction - The sodium ions concentration inside the cell is low, while the sodium ions…

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

A: The solutes migrate down the concentration gradient from high concentration to low concentration in…

Q: Describe ONE modification that could happen to the phospholipids in a membrane that would increase…

A: The membrane of cell organelles is composed of a phospholipid bilayer which contains two layers of…

Q: a. What concept pertains to the movement of particles across the cell membrane?       A. Diffusion…

A: a. What concept pertains to the movement of particles across the cell membrane? A. Diffusion…

Q: Which of the following best describes a hyperosmotic solution? A. a solution with a higher…

A: Given: A solution is a homogenous mixture  which is madeup of a solute dissolved within a solvent.…

Q: A young man in his 20s has a heart attack and is rushed to the hospital. Blood is drawn, and his…

A: Simple diffusion – the molecules of gases such as oxygen and carbon dioxide are tiny enough to pass…

Q: Glucose is often present in very low concentrations in environments populated by microorganisms. To…

A: Glucose is a six-carbon sugar that provides the energy needed by cells. Since glucose is a large…

Q: a) Which of the two molecules that are the same size will passively diffuse across a cell membrane…

A: Diffusion is the movement of particles from an area of high concentration to an area of low…

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

A: The cell membrane is a selectively permeable membrane such that it allows only certain molecules to…

Q: What is osmosis?     a. the process where water diffuses across the cells' membrane from an area…

A: In osmosis the water (solvent) only moves across the semipermeable membrane. The solvent can't cross…

Q: A) Based on the drawings above, which molecules were able to diffuse through the 150 MWCO membrane?…

A: Introduction  MWCO means Molecular weight cutoff. This term is used to describe the pore size and…

Q: One of the following is TRUE? A. The transport of Na+ across cell membranes depends solely on…

A: An electrochemical gradient is defined as a gradient of the electrochemical potential. It is…

Q: Why can't ions like sodium (Na+) or potassium (K+) diffuse directly through the phospholipid…

A: The cell membrane is a quasi-fluid structure, meaning it provides stability to the cell and holds…

Q: a) Which of the two molecules that are the same size will passively diffuse across a cell membrane…

A: A) water and carbon dioxide can passively move across membrane because of its small size and water…

Q: Which of the following is true of exocytosis, but not true of facilitated diffusion? Select all that…

A: The use of secretory vesicles to transport molecules out of the cell by fusing the vesicles with the…

Q: Typically, our cells have a high concentration of sodium ions outside and a low concentration of…

A: Because the concentration of sodium ions  is more outside the cells. This means sodium ions…

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

A: Cell is the basic structural and functional unit of life.

Q: Which observation would suggest that active transport, rather than passive diffusion, is responsible…

A: Passive Diffusion is a downhill process, ATP independent.  During this process substances moves…

Q: What is the name of the mechanism that ensures that there is a higher concen- tration of sodium ions…

A: The ions sodium, potassium, and chloride have the largest concentrations and so play the most…

Q: If a membrane protein in an intact erythrocyte reacts with a membrane-impermeable reagent, what can…

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Q: How do electroneutral co-transporters depend on the transmembrane potential? Select one: a. They…

A: Membrane potential is the difference in electric potential between the interior and exterior of a…

Q: Which of the following is NOT a function of membrane proteins?   a.Regulate the passage of ions…

A: Cell is the building block of the body. It is the sub unit of organism.

Q: Which of the following distinguishes osmosis from simple diffusion?  a) a concentration gradient…

A: A cell membrane is made of various biological molecules such as phospholipids, cholesterol, and…

Q: Which of the following scenarios is an example of diffusion? A. A glass of water is spilled, and…

A: Cell transport is the development of substances across the cell layer either into or out of the…

Q: When cellular transport through the plasma membrane must be provided with energy in form of ATP to…

A: Step 1 Movement of materials in flowering plants occurs over short distances- inside the cell,…

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.