Cell Membrane Transport Quiz

<p>They are embedded within the membrane. (A)</p> Signup and view all the answers

<p>Concentration gradient (A)</p> Signup and view all the answers

<p>Osmosis refers specifically to the movement of solvent molecules. (A)</p> Signup and view all the answers

<p>It allows specific molecules to pass through the cell membrane without energy input. (B)</p> Signup and view all the answers

<p>Oxygen moves from air to blood, and carbon dioxide from blood to air. (B)</p> Signup and view all the answers

<p>Movement of molecules occurs randomly due to concentration gradients. (A)</p> Signup and view all the answers

<p>Solvent concentration. (B)</p> Signup and view all the answers

<p>Net passive movement from higher to lower concentration (B)</p> Signup and view all the answers

<p>Solids have particles that cannot move around (A)</p> Signup and view all the answers

<p>Particles from both fluids will mix until evenly distributed (C)</p> Signup and view all the answers

<p>Particles have spaces between them and can move about (A)</p> Signup and view all the answers

<p>It leads to the random movement of particles until evenly mixed (B)</p> Signup and view all the answers

<p>Stage 3 (B)</p> Signup and view all the answers

<p>Concentration of substances becomes uniform (C)</p> Signup and view all the answers

<p>It occurs without any barriers to particle movement (B)</p> Signup and view all the answers

<p>Active transport requires external energy. (C)</p> Signup and view all the answers

<p>Sodium/potassium pump (D)</p> Signup and view all the answers

<p>Pinocytosis (C)</p> Signup and view all the answers

<p>Packaging substances for exocytosis (D)</p> Signup and view all the answers

<p>Maintained electrochemical gradients across the membrane (A)</p> Signup and view all the answers

<p>0 kilopascal (kPa) (B)</p> Signup and view all the answers

<p>They attract water molecules, reducing their ability to move freely. (D)</p> Signup and view all the answers

<p>Increased solute concentration leads to lower water potential. (C)</p> Signup and view all the answers

<p>They indicate a higher concentration of solute in the solution. (D)</p> Signup and view all the answers

<p>The process of solute dissolving in a solvent. (D)</p> Signup and view all the answers

<p>0 kPa (C)</p> Signup and view all the answers

<p>It gains mass. (D)</p> Signup and view all the answers

<p>The cell wall provides structural support. (B)</p> Signup and view all the answers

<p>Water flows from A to C. (C)</p> Signup and view all the answers

<p>A 20% sugar solution. (D)</p> Signup and view all the answers

<p>The cells shrink as water exits. (B)</p> Signup and view all the answers

<p>They facilitate the passive movement of ions across the membrane. (D)</p> Signup and view all the answers

<p>Active transport (C)</p> Signup and view all the answers

<p>Glycoproteins (C)</p> Signup and view all the answers

<p>Facilitated diffusion involves the use of transport proteins. (D)</p> Signup and view all the answers

<p>It permits the passage of solvent molecules but not larger solute molecules. (B)</p> Signup and view all the answers

<p>Water moves out of the cell causing it to shrink. (C)</p> Signup and view all the answers

<p>They gain water and may burst. (B)</p> Signup and view all the answers

<p>It is full of water creating internal pressure against the cell wall. (C)</p> Signup and view all the answers

<p>Water moves out of the cell. (A)</p> Signup and view all the answers

<p>They maintain equal water potential with the surrounding cells. (C)</p> Signup and view all the answers

<p>Osmosis (B)</p> Signup and view all the answers

<p>From a hypotonic solution to a hypertonic solution. (D)</p> Signup and view all the answers

<p>In a hypotonic solution. (A)</p> Signup and view all the answers

<p>The cytoplasm is pulled away from the cell wall, leaving gaps. (B)</p> Signup and view all the answers

<p>Osmosis is utilized to move water back into the bloodstream. (A)</p> Signup and view all the answers

<p>It occurs through a selectively permeable membrane. (B)</p> Signup and view all the answers

<p>Isotonic (C)</p> Signup and view all the answers

<p>The cell becomes turgid as water enters. (C)</p> Signup and view all the answers

<p>It selectively permits water and certain solutes to cross. (D)</p> Signup and view all the answers

<p>Facilitated diffusion of glucose. (C)</p> Signup and view all the answers

<p>Substances move down the concentration gradient without energy. (D)</p> Signup and view all the answers

<p>It utilizes ATP to move substances against their concentration gradient. (D)</p> Signup and view all the answers

<p>As potassium chloride concentration increases, fewer cells lyse. (B)</p> Signup and view all the answers

<p>Water moves into the cells due to a lower external solute concentration, causing swelling. (A)</p> Signup and view all the answers

<p>Facilitated diffusion requires the use of energy in all scenarios. (D)</p> Signup and view all the answers

This type of membrane transport requires energy, usually in the form of ATP. It moves molecules against their concentration gradient, from a low concentration area to a high concentration area.

A component of the cell membrane, these proteins are embedded within the membrane structure.

This type of passive transport moves water across a selectively permeable membrane from an area of high water concentration to an area of low water concentration.

The movement of molecules across a membrane from an area of high concentration to low concentration, which doesn't require energy.

A component of the cell membrane, these proteins are found on the surface of the membrane, not embedded within it.

The movement of particles (atoms, ions, or molecules) from an area of higher concentration to an area of lower concentration.

Diffusion occurs because particles in fluids have spaces between them and are able to move around.

When two different fluids are separated by a barrier and the barrier is removed, the particles from both fluids will mix together until they are evenly distributed.

Diffusion cannot happen in solids because their particles are tightly packed and cannot move around.

The net movement of particles from regions of higher concentration to regions of lower concentration until the concentration is uniform throughout.

The movement of particles from regions of higher concentration to regions of lower concentration, occurring passively.

Particles in fluids can move randomly because of the spaces between them.

Diffusion happens until the concentration of the substance is the same throughout the entire space.

Movement of specific molecules across a cell membrane using a carrier protein. The molecules move down their concentration gradient, so no energy is needed.

Oxygen moving from the air to the blood, and carbon dioxide moving from the blood to the air. This process is essential for breathing and occurs in the alveoli of the lungs.

Oxygen moving from the blood to tissue cells, and carbon dioxide moving from tissue cells to the blood. This process is essential for delivering oxygen to cells and removing waste.

A membrane that allows the passage of some molecules but not others, like a picky bouncer at a club.

A solution with the same water potential as the cell, meaning there's no net movement of water.

A solution with a higher water potential than the cell, meaning water will move into the cell.

A solution with a lower water potential than the cell, meaning water will move out of the cell.

A plant cell that is full of water, like a plump balloon.

A plant cell that has lost water, causing it to shrink and become limp.

The pressure exerted by the cell wall against the contents of a plant cell, preventing it from bursting.

The movement of a substance across a cell membrane from a region of lower concentration to a region of higher concentration, requiring energy.

Specialized proteins embedded in the cell membrane that facilitate the movement of specific molecules during active transport.

A type of active transport where a cell engulfs large particles or molecules by wrapping its membrane around them, forming a vesicle.

A type of endocytosis where the cell takes in liquid substances.

A type of endocytosis where the cell takes in solid particles.

A solution with a higher solute concentration than the cell's cytoplasm, causing water to move out of the cell.

A solution with a lower solute concentration than the cell's cytoplasm, causing water to move into the cell.

A solution with the same solute concentration as the cell's cytoplasm, resulting in no net movement of water.

The tendency of water to move from an area of high water potential to an area of low water potential.

The bursting of a cell due to excessive water intake.

The shrinking of a cell due to water loss.

A measure of the potential of water to move from one area to another. Higher water potential means water wants to move out of the area; lower water potential means water will want to move into the area.

The more solutes present in a solution, the lower the water potential. Water molecules become attracted to the solutes and are less able to move freely.

The highest value of water potential is 0 kilopascals (kPa), which represents pure water. Solutions have negative values, and the more concentrated the solution, the more negative the value.

Water potential drives the movement of water across a membrane. Water moves from an area of high water potential to an area of low water potential.

The diagram shows water molecules surrounding a solute. There is a higher concentration of water molecules on the side without the solute, illustrating how solutes decrease water potential.

The movement of water molecules across a selectively permeable membrane from a region of high water potential to a region of low water potential.

The water potential of pure water is 0 kPa. Solutions have negative water potential values, with a lower water potential indicating a more concentrated solution.

A cell in a hypotonic solution will gain mass because the water potential of the solution is higher than the water potential inside the cell, causing water to move into the cell.

A plant cell will not burst because of osmosis because the cell wall provides structural support and prevents excessive swelling. The cell wall provides rigidity and restricts the cell from expanding beyond a certain point even when water enters.

A 20% sugar solution will have a lower water potential than a 4% sugar solution because it contains a higher concentration of solute. This means the 20% solution has less free water molecules compared to the 4% solution.

A protein embedded within the cell membrane that facilitates the movement of specific molecules across the membrane.

A protein embedded within the cell membrane that binds to specific molecules and helps transport them across the membrane.

Facilitated diffusion is a type of passive transport that doesn't require energy. It moves substances across a cell membrane down their concentration gradient, using specific protein channels or carriers.

Active transport requires energy (ATP) to move substances against their concentration gradient, from a low concentration area to a high concentration area. This movement goes against the natural flow of diffusion.

When red blood cells are placed in a solution with a lower concentration of potassium chloride than inside the cells, water rushes into the cells due to osmosis. This causes the cells to swell and eventually burst because there is no rigid cell wall to resist the influx.

The concentration gradient refers to the difference in concentration of a substance between two areas. Substances naturally move from an area of high concentration to an area of low concentration, following this gradient.