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NSG 530- EXAM 3 WILKES (EXAM 3 CHAPTER 37,38,39,) VERIFIED 100% CORRECT!!
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NSG 530- EXAM 3 WILKES (EXAM 3 CHAPTER 37,38,39,) VERIFIED 100% CORRECT!!
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NSG 530- EXAM 3WILKES (EXAM 3
CHAPTER 37,38,39,)
VERIFIED 100%
CORRECT!!
NSG 530
Evatee 9/4/24 NSG 530
,NSG 530- EXAM 3 WILKES (EXAM 3 CHAPTER
37,38,39,) VERIFIED 100% CORRECT!!
Role of digestive system Answer - produce energy from food ingested, transfer
energy-rich nutrients, water, and electrolytes into the body's internal
environment
gastrointestinal tract components Answer - mouth, esophagus, stomach, small
intestine, large intestine, rectum, anus
functions of the gastrointestinal system Answer - movement, secretion,
digestion, and absorption
alimentary canal Answer - GI tract-digestive tube that extends from the mouth
to the anus
single hallow tube
Layers of the gastrointestinal tract Answer - mucosa(outermost), submucosa,
muscularis, serosa/adventitia (innermost)
enteric (intramural) plexus Answer - controls mobility, secretion, sensation and
blood flow
functions of saliva Answer - lubrication, antibacterial action, pH regulation,
thermoregulation, enzymatic digestion
phases of swallowing Answer - oropharyngeal and esophageal
,oropharyngeal swallowing Answer - voluntary (striated) food formed into bolus
and forced towards pharynx
esophageal swallowing Answer - involuntary (smooth muscle) food bolus
enters esophagus, peristalsis occurs to move food down to lower esophageal
sphincter
how many permanent teeth are there in adults Answer - 32
three pairs of salivary glands Answer - parotid glands, sublingual glands,
submandibular glands
Saliva has a pH of Answer - about 7.4, used to neutralize bacterial acids and
prevents tooth decay
mucin Answer - sticky mucus that lines digestive and respiratory tract traps
microorganisms- provides lubrication
upper esophageal sphincter Answer - Keeps air from entering the esophagus
during respiration
lower esophageal sphincter Answer - Prevents regurgitation from the stomach
and caustic injury to the esophagus
Functions of the stomach Answer - stores food
secretes digestive juices
mixes food with the juices
propels partially digested food (chyme) into duodenum
, Chyme Answer - Partially digested, semiliquid food mixed with digestive
enzymes and acids in the stomach.
functional areas of the stomach Answer - the fundus (upper portion), body
(middle portion), and antrum (lower portion).
cardiac orifice Answer - opening between esophagus and stomach
pyloric sphincter Answer - ring of muscle that guards the opening between the
stomach and the duodenum
pylorus Answer - distal region of the stomach, opening to the duodenum
The stomach has three layers of muscle Answer - - longitudinal, circular, and
oblique (most prominent)
rugae Answer - the folds in the mucosa lining the stomach
the stomach is impermeable to what? Answer - water, but can absorb alcohol
and aspirin as they are lipid soluble.
blood to stomach is supplied by _____? Answer - celiac artery- abundant!
Three phases of gastric secretion Answer - 1. cephalic phase
2. gastric phase
3. intestinal phase
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