the endocrine system uses           messages called          to send signals which are fast or slow.
by

Your answer

Your name to display (optional):
Privacy: Your email address will only be used for sending these notifications.
Anti-spam verification:
To avoid this verification in future, please log in or register.

1 Answer

I am not sure exactly what the question is asking but the endocrine system sends hormones which can also be referred to as ligands through the blood stream to  binding sites called receptors which are found embedded in the cell membrane of the target cells.
by

Related questions

1 answer
asked May 28, 2012 by anonymous | 96 views
1 answer
asked May 10, 2012 by anonymous | 152 views
1 answer
asked Jul 23, 2012 by anonymous | 123 views
5 answers
2 answers
asked May 1, 2012 by anonymous | 713 views
1,287 questions
1,121 answers
30 comments
9,786 users