Counter-controlled repetition is also known as:

a) definite repetition
b) indefinite repetition
c) multiple-repetition structure
d) double-repetition structure

a) definite repetition

Explanation:

The counter-controlled repetitions is one in which we know the number of times a loop will be followed or performed.

Definite repetition is the one in which we know the number of iterations to be performed by a loop before the execution of the loop.  

For Example:  

Repeat a loop for 25 times printing out b *.

these  signals travel  down a part of the neuron called the axon, which is like a wire that carries the  signal  to othernerve  cells. on average a  nerve  cell sends a  signal  at about 50 meters per second, which is over 100  miles  an hour!