Once the threshold voltage triggers an action potential, what causes action potentials to be generated? a. lons channels are opened and positive ions diffuse into the cell.
b. lons channels are opened and negative ions diffuse into the cell.
c. lons channels are opened and positive ions diffuse out of the cell.
d. lons channels are opened and negative ions diffuse out of the cell.​

youre right there are

that scientist would be robert hooke

answer-

the statement that f(x) = |x+a| + b has exactly one x-intercept is sometimes correct.

solution-

it solely depends on b, whether the function will have one or two or zero x intercept.

this plot of the given function, f(x) = |x+a| + b will be the basic absolute value graph i.e v shape, with vertex translated to (-a, b), instead of origin.

1-   if b is zero, the graph will have exactly one x-intercept, at x= -a

2- if b is positive, the whole graph will be above the x-axis, hence it will have no x-intercepts.

3- if b is negative, the graph will be below the x-axis, hence it will have two x-intercepts.

∴ the statement is sometimes true.