Describe how food in the stomach affects other structures in the digestive system. Include information about hormonal and neural reflexes
What will be an ideal response?
Food in the stomach initiates the gastric phase of stomach activity resulting in increased motility and gastric secretions. Gastrin released into the blood from the stomach stimulates ileal motility, relaxes the ileocecal sphincter, and induces mass movements in the colon. These functions outside of the stomach keep the contents of the small intestine and colon moving through the digestive tract to make room for the food that will be leaving the stomach shortly. Gastrin also helps maintain the mucosal linings of small intestine. Neural reflexes initiated when the stomach fills with food include the gastroileal reflex, which moves material through the small intestine, and the gastrocolic reflex, which triggers mass movement in the colon. These reflexes keep material moving in the digestive track to make room for food leaving the stomach.
You might also like to view...
A person's hands are exposed to a chemical that causes neurological damage. They begin to lose feeling in the skin of their palms and fingers, particularly the sense of fine touch. They no longer can differentiate textures in objects, nor can they tell when they are touching something. What skin structures must have been damaged?
A. The stratum basale of the epidermis B. Pacinian corpuscles C. Meissner's corpuscles D. Sebaceous glands
The extraembryonic membrane that forms the fetal portion of the placenta is the
A) yolk sac. B) amnion. C) allantois. D) chorion. E) decidua.
The protein that malfunctions in cystic fibrosis is a
A. potassium channel B. sodium pump C. chloride channel D. calcium pump
Lesions of the limbic system might result in
A. loss of coordination. B. a voracious appetite. C. loss of sensation. D. decreased sexual activity. E. enhanced fear and anger responses.