What is the primary mechanism by which the stomach protects itself from self-digestion by its own enzymes?
1) Mucus secretion by gastric mucosal cells
2) Presence of intrinsic factor in the gastric juice
3) High concentration of bicarbonate in gastric juice
4) Low pH of gastric juice inhibiting its own enzymes
E) The mucosal lining is impermeable to H+ ions

What is the primary function of the rubrospinal tract?
1) Control of distal muscle movement
2) Control of posture and balance
3) Control of autonomic functions
4) Control of respiration

What is the main function of the cephalic phase of gastric secretion?
1) To secrete digestive enzymes
2) To increase gastric motility
3) To increase gastric acidity
4) To initiate the secretion of gastrin
E) To prepare the stomach for food intake

What is the primary function of the parasympathetic nervous system?
1) Control of sympathetic nervous system
2) Control of visceral functions during rest and digestion
3) Control of musculoskeletal system during rest
4) Control of sensory systems during stress

What is the effect of fluorescent lighting on detecting scleral icterus?
1) It enhances the visibility of scleral icterus.
2) It does not affect the visibility of scleral icterus.
3) It makes it more difficult to detect scleral icterus.
4) It causes a false-positive result for scleral icterus.