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.
Supporting Details in Writing. 4. A paragraph is a series of sentences that support a main idea, or point. A. paragraph typically starts with the main idea or point (also called the topic. sentence ), and the rest of the paragraph provides speciÃc details to support and. develop the point. The illustration below shows the relationship between point and. support.