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L10, Resting membrane potential, Physiology

 Lecture video 


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MCQ 

1 _ The RMP is the potential deference between the outside and inside of the nerve fiber during The rest? (T, F)


2_ The RMP in medium sized nerve =... mV

A-50.

B-60.

C-70.


3_ The cell membrane contains passive ions channels which allow the passage of certain ions And prevent passage of the other ? (T,F)


4_ at rest the cell membrane is about .... Times more permeable for ...... Than .....

A-100 times, K ions, Na ions.

B-100 times, Na ions, K ions.

C-50 times K ions, Na ions.


5_ at RMP K ions diffuse..

A-From inside the cell to outside.

B-From outside the cell to inside.

C-None of the above.


6_ at RMP Na ions diffuse..

A-From inside the cell to outside.

B-From outside the cell to inside.

C-None of the above.


7_Causes of resting membrane potential are:

A-distribution of ions 

B-Selective permeability

C-Na_K pump

D-All of the above 


8_K ions inside the cell is ........more concentrated than outside:

A-30times

B-10 times

C-60 times

D-20times


9_T or F: protien ions can diffuse outside because cell membrane is permeable for these ions .


10_Na ions diffuse from outside to inside the cell because:

A-Concentration gradient (Na outside is 10)times more than inside.

B-Electric gradient (Na is positive and inside is negative )

C-All of the above 

D-None of the above 


11_ All are true about Na_K Atpase except:

A-Mentains Na ions outside the cell

B-Mentains K ions inside the cell

C-It is active process

D-Pumps 2Na ions outside the cell and 3k ions inside it .


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