Biology Chapter: Membrane Transport Quiz

<p>Water will continue to move in both directions at equal rate with no net change. (B)</p> Signup and view all the answers

<p>Whether or not the process requires energy. (D)</p> Signup and view all the answers

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

<p>Facilitating direct communication between cells (C)</p> Signup and view all the answers

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

<p>Serve as cell recognition markers (D)</p> Signup and view all the answers

<p>Integral proteins span the membrane while peripheral proteins are on its surface (A)</p> Signup and view all the answers

<p>The cell will swell and may become turgid. (D)</p> Signup and view all the answers

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

<p>Excretion of excess water to prevent lysis (B)</p> Signup and view all the answers

<p>The cell will undergo plasmolysis. (A)</p> Signup and view all the answers

<p>Water movement occurs equally in both directions. (C)</p> Signup and view all the answers

<p>Providing rigid structure for the cell (C)</p> Signup and view all the answers

<p>The nonpolar fatty acid tails (A)</p> Signup and view all the answers

<p>Both the intracellular and extracellular environments (A)</p> Signup and view all the answers

<p>It is fluid and allows for flexibility in structure and function. (A)</p> Signup and view all the answers

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

<p>Diffusion refers to solute movement from high to low concentration, whereas osmosis refers to solvent movement from low to high solute concentration. (D)</p> Signup and view all the answers

<p>Equal concentration of both solute and solvent inside and outside the cell. (B)</p> Signup and view all the answers

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

<p>The concentration of solute in the internal and external solutions. (C)</p> Signup and view all the answers

<p>Water moves out of the cell, leading to cell shrinkage. (D)</p> Signup and view all the answers

<p>The concentration gradient of solute across the membrane. (D)</p> Signup and view all the answers

<p>A combination of solute and solvent. (C)</p> Signup and view all the answers

<p>When the solute concentration is equal on both sides. (B)</p> Signup and view all the answers

<p>The predominant direction in which the majority of particles are moving. (B)</p> Signup and view all the answers

<p>Solvent moves from areas of low solute concentration to high solute concentration. (B)</p> Signup and view all the answers

The movement of very small, nonpolar molecules directly through the phospholipid bilayer of the cell membrane.

The movement of large or charged molecules across the cell membrane using transport proteins

The movement of water across a semipermeable membrane from an area of high water concentration to an area of low water concentration.

This type of cell transport does not require energy and molecules move from an area of high concentration to an area of low concentration.

Once the concentration of molecules is equal on both sides of the membrane, there is no net movement of molecules.

A solution where the concentration of solutes is lower outside the cell than inside the cell. Water moves into the cell.

A solution where the concentration of solutes is higher outside the cell than inside the cell. Water moves out of the cell.

A solution where the concentration of solutes is equal inside and outside the cell. Water moves in both directions at the same rate.

The pressure exerted by the cell's contents against the cell wall in plants. This pressure helps maintain the plant's upright structure.

A specialized organelle found in some single-celled organisms. It helps remove excess water from the cell to prevent it from bursting.

The difference in concentration of a substance between two areas.

The substance that dissolves in a solvent.

The substance that dissolves the solute.

A mixture of solute and solvent.

The overall direction of movement of molecules across a membrane.

The movement of solute molecules from an area of high concentration to an area of low concentration.

A type of membrane that allows some substances to pass through but not others.

The process of comparing the concentration of solutions inside and outside a cell to predict water movement and cell impact due to osmosis.

The cell membrane, also known as the plasma membrane, is a vital structure found in all cells. It's flexible and fluid, acting as a barrier between the cell's interior and its external environment.

The primary function of the cell membrane is to control what enters and exits the cell. It acts as a selective barrier, ensuring the cell maintains its internal balance, known as homeostasis.

The cell membrane is composed of two layers of phospholipids. Each phospholipid has a hydrophilic head that faces the water-based environments inside and outside the cell, and a hydrophobic tail that faces inwards, creating a barrier.

The term 'intracellular' refers to anything located inside the cell, while 'extracellular' refers to anything located outside the cell.

The cell membrane, while essential for control and protection, doesn't provide rigid structure for the cell. That function is typically performed by the cell wall in plant cells or the cytoskeleton in animal cells.

Cell membrane proteins that are embedded within the membrane itself, interacting with its hydrophobic core.

Cell membrane proteins that are attached to the surface of the membrane, but don't extend into its hydrophobic core.

These junctions allow for direct communication between adjacent cells, enabling rapid signal transmission.

A model that describes the cell membrane as a flexible structure composed of various components, constantly in motion.

These molecules help stabilize the cell membrane by adjusting its fluidity in different temperatures.