BioTest4 Digestion
Terms
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- What is secretion?
- the release of enzymes to break down food
- what is the lumen?
- the cavity inside the tube
- What is the serosa?
- the fluid secreting membrane that assists in movement along the GI tract
- what do sphincters do?
- seal off tube and move food along by expansion and contraction
- what enzyme does saliva contain?
- anylase
- what is peristalsis
- alternating waves of stomach contractions and relaxation
- what are gastric glands?
- cells lining the stomachs interiors
- what is HCI?
- stomach acid
- what does pepsin do?
- digests proteins and breaks them into smaller pieces
- what is gastric juice3 made out of and what does it do?
- its made up of acid, digestive enzymes, mucus, and pepsin and it breaks down food molecules
- what is chyme?
- a mixture of food and gastric juices
- what does the small intestine do?
- chemical digestion and absorption of nutrients into the bloodstream
- where do all the digestive enzymes meet?
- the duodenum
- what does bile do?
- speeds up digestion
- what do villi do?
- absorb nutrients
- what is a lacteal?
- a capillary that absorbs fat on the villi
- what does the pancreas do?
- secretes juice into the duodenum
- what does pancreatic juice do?
- it neutralizes stomach acid and contains enzymes
- what does the large intestine do?
- absorb water and takes waste to the anus
- what does the colon do?
- absorbs water
- rectum?
- stores feces until they can be eliminated
- what are minerals?
- inorganic substances needed for good health
- what are b complex vitamins?
- they maintain the nervous system