Lowered extracellular potassium levels will lower the heart rate because
A. the resting membrane potential is hyperpolarized.
B. ectopic action potentials occur.
C. action potential amplitude declines.
D. more sodium channels open.
E. it blocks calcium channels.
A
You might also like to view...
Which ascending tract carries the sensations for fine touch and vibration?
A) corticobulbar B) corticospinal C) posterior (dorsal) column D) spinothalamic E) spinocerebellar
In intracellular fluid the most abundant cation is
a) Na+ b) Cl- c) K+ d) HPO42- e) HCO3-
The corpus luteum in a nonpregnant woman usually lasts about _________.
A) 3 months. B) 7 days. C) 3 days. D) 28 days. E) 12 days.
When a partial pressure gradient exists for a gas, it will move from the area of its lower partial pressure to the area of higher partial pressure.
Answer the following statement true (T) or false (F)