Card Set Information
39 principles life
ch39 principles of life.
Carbs, proteins and lipids important to make
Good diet gives 3 things
Chemical energy needed, break down organic building blocks, essential nutrient (body cannot synthesize)
What is essential?
Essential fatty acids, amino acids, minerals and vitamins. WE CANT MAKE THEM.
Many plant proteins are
There are ____ essential vitamins.
13. They are water soluble and excreted in urine.
Vitamin A deficiency is leading cause of
Improper or no folic acid during gestation results in
Neural tube defects
Minerals are INORGANIC and required in ____ amounts.
Small. Iron, iodine, sodium, sulfur, calcium
Food processing steps
Ingestion> digestion> absorption > elimination
Mechanical digestion are carried out by
Teeth and stomach (churning)
Different kind of feeders
Fluid, filter feeding, substrate feeding, bulk (humans)
When organism is ON what its feeeding on
Esophagus and stomach
Large intestine and anus/cloaca
Food is pushed along digestive track via
Ball of food is called
_______- breaks down starch and glycogen during chewing
Trachea is supported by
What keeps food from being inhaled in trachea?
Stomach is NOT essential for digestion
Gastric juice + food =
Two stomach sphincters
Lower esophageal, pyloric
Parietal cells produce
Hydrochloric acid. Stomach acid.
3 parts of small intestine
Duodenum, jejunum, ileum.
Hormone important for hunger and satiety
Leptin (telling stomach you're full);
Hormone immprtant to increase hunger
____ have shorter digestive track
Largest organ in the body
Produces bile and breaks down toxins
Secretes digestive enzymes into duodenum; neutralizes chyme
Other pancreatic enzymes
Lipases, amylases, proteases
Acts as a filter system
Helps ferment feces
Processes of food digestion regulated by
Enteric nervous system