QuestionSBA
QuestionChoice
Resting membrane potential is -90mV, it is shifted to -80mV
10026863
c
Resting membrane potential is shifted from +90mV to +80mV
QuestionChoice
This occurs in hypokalaemia and means that cells require more stimulation to become excited
10026862
b
Resting membrane potential is shifted to a more negative value
QuestionChoice
The resting potential of cardiomyocytes is shifted from around -90mV to -80mV, this allows cells to be more easily excited
10026861
a
Resting membrane potential is shifted to a less negative value
QuestionChoice
Resting membrane potential is shifted from -90mV to -80mV
10026864
d
Resting membrane potential is shifted from +80mV to +90mV
QuestionChoice
Hyperkalaemia causes the resting membrane potential to be shifted from -90mV to -80mV, this is closer to the threshold potential of 75mV
10026865
e
Hyperkalaemia does not affect the resting membrane potential of cardiomyocytes
Concept
Chapter
2693
5929
Hyperkalaemia
Topic
309
Biochemistry, cell biology and clinical chemistry
17770
Hyperkalaemia can lead to arrhythmias due to overexcitability of cardiomyocytes.

Which of the following describes the effect of hyperkalaemia on the resting potential of cardiac cells?
a