Cellular Transport and Signaling
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Cellular Transport and Signaling

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Questions and Answers

What is the primary function of detecting chemical messengers arriving at the cell surface?

  • Maintaining homeostasis
  • Detecting chemical messengers (correct)
  • Regulating cell-to-cell communication
  • Facilitating transport across cellular membranes

    • What is the main difference between passive and active transport?

  • The type of molecules being transported
  • The direction of transport
  • The presence of carrier proteins
  • The requirement of additional energy (correct)

    • What is the primary mechanism of transport for small, nonpolar molecules across cellular membranes?

  • Active transport
  • Facilitated diffusion
  • Carrier protein-mediated transport
  • Diffusion (correct)

    • What is the purpose of carrier proteins in facilitated diffusion?

    <p>To combine with molecules for transport</p> Signup and view all the answers

    What is the driving force behind diffusion?

    <p>Kinetic energy</p> Signup and view all the answers

    What is the characteristic of most molecules found in the intracellular fluid (ICF) and extracellular fluid (ECF)?

    <p>They are charged</p> Signup and view all the answers

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