Which of the following is true of the colon?
A) The density of the gastrointestinal microbiota is greatest in the colon.
B) The inner lining of the colon is made of epithelial cells called enterocytes.
C) It neutralizes the acidic chyme before it enters the duodenum.
D) It releases gastrin that stimulates the production of gastric juice.
Question 2
Which of the following is true of microvilli?
A) They form the site where nutrient digestion begins.
B) They are held together by interlocking proteins.
C) They cover the lumenal surfaces of enterocytes.
D) They secrete a hormone known as gastrin.