Stomach
Terms
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- This stomach layer is a thin layer of loose connective tissue and contains BV and lymphatic tissue.
- lamina propria
- This thin layer of smooth muscle causes folds to form in mucosal layer
- Muscularis mucosae
-
This layer of the stomach contains loose connective tissue containing BV, glands and lymphatic tissue; and
MeissnerÂ’s plexus - submucosa
- What stomach muscles are found in mouth, pharynx , upper esophagus and anus; aid in the control of over swallowing and defecation?
- skeletal muscle
-
What muscle consists of inner circular fibers & outer longitudinal fibers
mixes, crushes & propels food along by peristalsis? - smooth muscle
- The muscle of the tongue is attached to what?
- hyoid, mandible, hard palate and styloid process
- What are the taste buds of the tongue called?
- papillae
- What is the hardest substance in the body and what is it made of?
- enamel; calcium carbonate
- What is the calcified connective tissue of teeth called?
- dentin
- What is the bone-like periodontal ligament that penetrates dentin?
- cementum
- Between 6-12 years, how many teeth do you have?
- 32
- At what age do you begin to erupt 20 new teeth?
- 6 months
- In the esophagus, what portion constitutes skeletal muscle? smooth muscle?
-
upper = skeletal
lower = smooth - During involuntary swallowing, what happens?
-
breathing stops & airway closed
soft palate & uvula are lifted to close off nasopharynx
vocal cords close - What is pepsinogen? and what does HCL do to it?
- pepsinogen is the inactive form of pepsin; hcl converts it into pepsin
- What is the intrinsic factor of gastric glands?
- absorption of vitamin B12 for RBC production
- The gastrin hormone -- "get it out of here" -- as in clearing the stomach of crap, has what specific functions?
-
get it out of here”
release more gastric juice
increase gastric motility
relax pyloric sphincter
constrict esophageal sphincter preventing entry - What contributes to fat digestion?
-
gastric lipase splits the triglycerides in milk fat
most effective at pH 5 to 6 (infant stomach) - What occurs in the cephalic phase?
- the stomach is getting ready -- receptors for smell, taste, senses. SLUDD stimulation; vagus nerve increases muscle activity
- What occurs in the gastric phase?
- this is where the stomach does the actual digestion and work
- What goes on in the intestinal phase?
- Stretch receptors in duodenum; fatty acids and glucose
- What does the stomach absorb?
-
cold water
electrolyes
drugs
alcohol