Answer to Question 1
ANS: C
The O'Beirne sphincter controls the movement of wastes from the sigmoid colon into the rectum. None of the other options performs this function.
Answer to Question 2
ANS: A
The ileogastric reflex, not the gastroduodenal, inhibits gastric motility when the ileum becomes distended. The gastroileal reflex, which is activated by an increase in gastric motility and secre-tion, stimulates an increase in ileal motility and relaxation of the ileocecal valve (sphincter). The gastrocolic reflex initiates propulsion in the entire colon, usually during or immediately after eat-ing, when chyme enters from the ileum.
Amoeboid movement promoted by changes in the locations of actin filaments.
Movement of myosin-coated beads along actin filaments.
The male reproductive system, sagittal section showing the organs of the system and their relation t
The digestive system: functions of the small intestine and large intestine (colon)
Targeting female fetuses for abortion has become a main issue of the emerging feminist movement in ...
Circling the forearm to create movement at the elbow.