4.1 Channels and Transporters Flashcards

1
Q

Channels + Transporters

A

Passive transport:

  • simple diffusion
  • channel mediated
  • carrier mediated

=> electrochemical gradient with no membrane potential
=> electrochemical gradient with membrane potential negative inside

Active transport

=> electrochemical gradient with membrane potential positive inside

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2
Q

Channels

A

weak interaction with solutes, no/limited conformational change

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3
Q

Transporters

A

bind specific solutes, undergo conformational change

Transport via channels much faster than via transporters

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4
Q

Passive Transport

A

Uses an electrochemical gradient or charge

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5
Q

Active Transport

A

Requires energy input (can be transport against an

electrochemical gradient or charge)

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