Compare and contrast communication by nerve signal with communication across plasmodesmata

Hi,

It is very important that cells of every organism i.e animals as well as plants communicate with each other for the better development and organization of whole body.

Comparison between them:

Communication by nerve signal:

It is a mode of communication of nerve cells of nervous system in which specific gaps or junctions are present between the cells. These junctions have important role in the transmission of messages from one nerve cell to another because they release and catch specific molecules called neurotransmiiter which contains messages.

Communication across plasmodesmata:

Although the structure of plasmodesmata is very different from gap junctions of nerve cells but still they have a same role. You can think of plasmodesmata as a channel which joins the plasma membrane of two plant cells together. So when plasma membrane of cell is linked with other cell's plasma membrane it forms small passageway between the cells.Therefore, cytoplasm of two cells gets attached and molecules can pass from one cell to another and these molecules can be hormones which have a some role in plants as the role of hormones in humans i.e communication and coordination.

Contrast between them:

Although they have similar role but still they are different in structure and tenacity. Plasmodesmata are communication channel in plants while gap junctions are communication channels of humans. They are also involved in different responses because responses of animals and plants are different to an environmental stimuli.

Hope it help!

the glands which are associated with each description is given below:

pancreas - is an endocrine and exocrine gland that secretes juices with enzymes for digestion. salivary glands- with protection and digestion in the mouth. liver- secretes bile for digestion.   lachrymal glands - secrete tears to moisten eyes and protect them from particles and infection.   sweat gland -regulates water, salt, and temperature. oil glands - to form a protective barrier on the skin.   goblet cells - secrete mucus for protection.