What is one function of the pyloric sphincter?

a. controls the release of pancreatic secretions into the small intenstine
b. prevents stomach contents from backing up into the esophagus
c. controls the passage of chyme from the stomach into the small intestine
d. prevents the backward movement of feces from the large intestine into the small intestine

in the year 2850, humans successfully colonized mars. the martian modules that were constructed could hold only a small population of people. it is now a century later, and the population on mars has grown to 600 people. of the current mars population, 45 people express the recessive phenotype for phenylketon- uria (pku) syndrome (pp genotype).

explanation: