The following CSS properties will be explained: 1  color. 2  background-color. 3  background-image.  background- 1 repeat. background-attachment.  background- 1 position. background.
The transmission of a signal through the nervous system can also be considered an example of long-distance signaling. Local signaling in plants is not well understood. Because of their cell walls, plants must have different mechanisms from animals. Plants and animals use hormones for long-distance signaling. In animals, specialized endocrine cells release hormones into the circulatory system, by which they travel to target cells in other parts of the body. Plant hormones, called growth regulators, may travel in vessels but more often travel from cell to cell or move through air by diffusion.
The main body systems involved in hormone regulation by feedback mechanisms are: 1  the nervous system. ... 2  signals input to and output from the control centre are either. 3  which are part of the. , 4  or chemical signals. 5  the endocrine system.... 6  which produces and secretes hormones.he main body systems involved in hormone regulation by feedback mechanisms are: 1  the nervous system. ... 2  signals input to and output from the control centre are either. 3  which are part of the. , 4  or chemical signals. 5  the endocrine system.