The concentration gradient for potassium tends to ____.
a. draw potassium into the cell
b. push chloride out of the cell
c. push sodium out of the cell
d. push potassium out of the cell
Question 2
Humans expend most of their energy on which activity?
a. walking, running, and other forms of locomotion
b. in the beating of their hearts and blood circulation
c. propagating action potentials in the billions of neurons in the nervous system
d. maintaining basal metabolism
