5. Why is the ileum long and coiled?​

The huge length gives an adequate opportunity to the body to process the food and concentrate greatest sustenance while the various finger-like projections called villi alongside miniature villi increment the surface region for assimilation.

Explanation:

I hope this helps u! :D

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!