Does `randn()` use a continous system to generate random number in Matlab?

In Matlab randn() is used to get numbers which follow a Gaussian Distribution. I think Matlab uses a pseudo random number generator to obtain these values. Does randn() use discrete in time system to give the numbers? This question arises because if I want to obtain N numbers I simplycall randn(1,N) which gives real valued numbers, but there is no information if the time is discrete or not. CAn somebody please provide any information on this? Thank you