The juxtaglomerular cells (JG cells, or granular cells) are cells in the kidney that synthesize, store, and secrete the enzyme renin.he juxtaglomerular cells (JG cells, or granular cells) are cells in the kidney that synthesize, store, and secrete the enzyme renin.
Throckmorton County, Texas. Throckmorton County is a county located in the U.S. state of Texas. As of the 2010 census, its population was 1,641. Its county seat is Throckmorton. The county was created in 1858 and later organized in 1879. It is named for William Throckmorton, an early Collin County settler.
The city is home to the Higher Education Center at Rockwall, which is part of the community college district, Collin College. The campus is the District's first campus outside of Collin County itself. Texas A&M University-Commerce holds classes at the Center.bout 3.2% of families and 3.9% of the population were below the poverty line, including 4.6% of those under age 18 and 3.0% of those age 65 or over. Though Rockwall County is the smallest county in Texas, it is also one of the top five fastest growing counties in the United States.