Which tract terminates in the gray matter between the posterior and anterior horns of the spinal cord as well as all levels of the spinal cord

huh

explanation:

passive transport is a movement of biochemicals and other atomic or molecular substances across cell membranes without need of energy input. unlike active transport, it does not require an input of cellular energy because it is instead driven by the tendency of the system to grow in entropy.

so, according to what that says, i believe it's hypertonic and hypotonic.

good luck!

. a balance and a graduated cylinder.