When all was said and done, Barack Obama and Mitt Romney, the two major party candidates for president in 2012, spent close to $1.12 billion -- not counting the millions more spent by the parties and outside groups. Overall, the presidential race cost more than $2.6 billion in that cycle. 2012 Presidential Race. When all was said and done, Barack Obama and Mitt Romney, the two major party candidates for president in 2012, spent close to $1.12 billion -- not counting the millions more spent by the parties and outside groups. Overall, the presidential race cost more than $2.6 billion in that cycle. Fundraising.
Best Answer: Epithelial tissue has 4 functions: protection, absorption, secretion, stimulation. Protection is reflected in the fact that epithelial cells are closely packed.
Learning Objectives. 1  Describe how different types of epithelia (simple, stratified, squamous, columnar) facilitate the performance of different functions. 2  List the junctional complexes that hold epithelial cells together and their primary functions. 3  List the functions of the basement membrane and how epithelial cells attach to the basement 4  ... Diagiven the wide distribution, epithelial cells perform a variety of functions: protection (skin), absorption (intestine), secretion (glands), excretion (kidney), gas exchange (lung and blood vessels). To perform these functions, epithelia assemble into different structures.