In order to detect a signal (that is, to be a target cell), a neighbor cell must have the right receptor for that signal. When a signaling molecule binds to its receptor, it alters the shape or activity of the receptor, triggering a change inside of the cell. Signaling molecules are often called ligands, a general term for molecules that bind specifically to other molecules (such as receptors).
A chunk paragraph is just a way of developing your skill in writing - it is a style or format which forces you to explain your ideas and arguments. Here's you do chunk writing: Write your topic sentence.
A common feature in a long document is the ârunning headâ, where each chapter or section heading appears. in the header or footer. You could insert section breaks, unlink the sections and edit the header or footer for. each section as described above, but a much simpler way is to use Wordâs fields facility.