Murfreesboro is a city in Pike County, Arkansas, United States. The population was 1,764 at the 2000 census. The city is the county seat of Pike County. Crater of Diamonds State Park is located just to the south. The crater is an eroded lamproite pipe where diamonds were discovered in 1906. 100,000 were found by 1933, and visitors to the park may still take away whatever they can find.
The guard cells surround each stoma in a plant cell. They regulate  the opening and closing of stomata to facilitate gas exchange and  control transpiration in plants.
Now with the GUARD cells the plants hormones can send signals to the guard cells which can help the guard cells figure out whether or not it needs to open or close the stomata. And if the plant is losing water too quickly, the guard cells may close the stomata to help prevent it from happening! :) Comments. Report.