BIOD 121 (PORTAGE): MODULE 1
QUESTIONS WITH COMPLETE
SOLUTION
u What is nutrition? - science that links foods to health and disease.
What two motives drive people to eat certain foods? - taste and texture
hunger - internal drive often experienced as a negative sensation such as churning, growling, or a painful
sensation in the stomach
appetite - external drive often related to pleasant sensations associated with food and can lead us to eat
even if we are not hungry
satiety - the feeling of being full
hypothalamus - a region of the brain that plays a role in hunger as well the feeling of being full
Hormones that increase hunger - ghrelin, endorphins, neuropeptide-Y
Hormones that decrease hunger (cause satiety) - leptin, serotonin, cholecystokinin (CCK)
Leptin - alerts the brain to turn off the hunger center and activates the satiety center when consuming a
meal- produced in adipose cells (fat cells)
Ghrelin - produced by the stomach and has an opposing role- stimulates the hunger center as it
deactivates the satiety center
In general, there are four types of external forces that influence our eating habits: - sensory, cognitive,
environmental, health status
sensory - flavor, texture, and appearance
cognitive - Habits: Routines are tied to our food choices
Comfort foods: Early influences expose us to a variety of foods that we relate to people, places, and
events- begin during childhood and carry through for the rest of our lives
Advertising: This is a major media tool used to influence our food choices in terms of intake as well as
what we purchase
QUESTIONS WITH COMPLETE
SOLUTION
u What is nutrition? - science that links foods to health and disease.
What two motives drive people to eat certain foods? - taste and texture
hunger - internal drive often experienced as a negative sensation such as churning, growling, or a painful
sensation in the stomach
appetite - external drive often related to pleasant sensations associated with food and can lead us to eat
even if we are not hungry
satiety - the feeling of being full
hypothalamus - a region of the brain that plays a role in hunger as well the feeling of being full
Hormones that increase hunger - ghrelin, endorphins, neuropeptide-Y
Hormones that decrease hunger (cause satiety) - leptin, serotonin, cholecystokinin (CCK)
Leptin - alerts the brain to turn off the hunger center and activates the satiety center when consuming a
meal- produced in adipose cells (fat cells)
Ghrelin - produced by the stomach and has an opposing role- stimulates the hunger center as it
deactivates the satiety center
In general, there are four types of external forces that influence our eating habits: - sensory, cognitive,
environmental, health status
sensory - flavor, texture, and appearance
cognitive - Habits: Routines are tied to our food choices
Comfort foods: Early influences expose us to a variety of foods that we relate to people, places, and
events- begin during childhood and carry through for the rest of our lives
Advertising: This is a major media tool used to influence our food choices in terms of intake as well as
what we purchase
