Dr Gawad Physiology Course Online Exam - Excitable - Lecture 1 (Introduction, Resting Membrane Potential)

7 Questions | Total Attempts: 244

SettingsSettingsSettings
Please wait...
Dr Gawad Physiology Course Online Exam - Excitable - Lecture 1 (Introduction, Resting Membrane Potential)

7 MCQs (Only one correct answer)Each MCQ: 1 mark, Total mark: 7 Allowed time: 8 minGood Luck


Questions and Answers
  • 1. 
    According to the active (Na-K) pump:
    • A. 

      A trans membrane protein showing large number of binding sites on its interior aspect

    • B. 

      Inner ATPase activity is concerned to produce conformational change followed by 2 K+ pumped inside

    • C. 

      Ions migrate uphill against both (concentration + electrical) gradient

    • D. 

      Binding of (Na – K) to their respective binding sites is followed by activation of the inner ATPase

    • E. 

      All is true

  • 2. 
    The main responsible ion for the negative RMP is
    • A. 

      Na

    • B. 

      K

    • C. 

      Cl

    • D. 

      HCO3

  • 3. 
    The main cause of negative RMP is
    • A. 

      K outflux

    • B. 

      Na inflow

    • C. 

      Membrane imperbeability to protien

    • D. 

      None of the above

  • 4. 
    RMP is due to which of the following:
    • A. 

      Passive movements of ions along the membrane

    • B. 

      Selective permeability of the membrane

    • C. 

      Active Na and K transport

    • D. 

      Impermeability of the membrane to protein

    • E. 

      All of the above

  • 5. 
    Isopotential means
    • A. 

      More negative

    • B. 

      More positive

    • C. 

      Same potential

    • D. 

      None of the above.

  • 6. 
    The main cause of RMP is
    • A. 

      Unequal distribution of ions

    • B. 

      That it is totally dependant on a passive process

    • C. 

      That it is totally dependant on active process

    • D. 

      The osmotic power of Na

  • 7. 
    Regarding K transportation during RMP
    • A. 

      It is slower than Na

    • B. 

      It is limited by the positivity of the outer membrane

    • C. 

      It is from outer to inner surface by active process

    • D. 

      It is as the same amount of Cl movement

Back to Top Back to top