Question

which of these characterisitics apply to exocytosis?

requirese energy, requires, carrier proteins, requires channel proteins and/or requires vesicles.

Thanks.

Since this is not my area of expertise, I searched Google under the key words "<I>exocytosis</I>" to get these possible sources:

http://en.wikipedia.org/wiki/Exocytosis
http://users.rcn.com/jkimball.ma.ultranet/BiologyPages/E/Exocytosis.html
http://academic.brooklyn.cuny.edu/biology/bio4fv/page/exocy.htm
http://www.answers.com/topic/exocytosis

You can do a similar search with other key words for future questions.

I hope this helps. Thanks for asking.