Cell Membrane & Transport Study Guide

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Questions and Answers

What is the main characteristic of passive transport?

  • Moves with the concentration gradient (correct)
  • Involves a protein pump
  • Moves against the concentration gradient
  • Requires energy

Which process involves the movement of molecules across the phospholipid bilayer with the help of a transport/channel protein?

  • Active transport
  • Facilitated diffusion (correct)
  • Simple diffusion
  • Osmosis

What type of state is an animal cell in when placed in distilled water?

  • Isotonic
  • Hyperosmotic
  • Hypotonic (correct)
  • Hypertonic

If a substance moves from an area of low concentration to high concentration using a protein pump, what type of transport is this?

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

What happens to an animal cell placed in saltwater?

<p>It shrivels (D)</p> Signup and view all the answers

Which process involves the movement of molecules to reach equilibrium between two sides of the cell membrane?

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

What is the primary difference between simple diffusion and facilitated diffusion?

<p>Facilitated diffusion involves the movement of molecules through a protein channel, whereas simple diffusion occurs directly through the phospholipid bilayer. (A)</p> Signup and view all the answers

Which type of transport involves the movement of water across a selectively permeable membrane?

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

What characterizes active transport processes?

<p>Energy is required to move molecules against the concentration gradient (A)</p> Signup and view all the answers

Which process involves a cell engulfing or eating something?

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

What is the key feature of protein pumps in active transport?

<p>They move molecules from low concentration to high concentration (B)</p> Signup and view all the answers

What term describes a cell in which the same amount of water is going in as going out, resulting in equilibrium?

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

What is the main component that makes up the cell membrane?

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

Which type of cell transport does not require energy to move molecules across the membrane?

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

Which cellular structure helps keep the cell membrane intact by sticking its components together?

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

In which type of transport is energy required to move substances across the cell membrane against the concentration gradient?

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

Which type of transport uses vesicles to transport large substances into or out of the cell?

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

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