Biology Questions and Answers
digestive adnexal glands. The digestive
tube is composed of mouth, pharynx,esophagus, stomach, small intestine
(duodenum, jejunum, ileum), large
intestine (caecum, anus. colon, rectum) and
- What are peristaltic
movements? What is their role
in human digestion?
Peristalsissynchronized contractions is the process of of the (^)
muscularPeristaltic wall of the digestive tube. movements may occur from (^)
the esophagus until and including the
bowels.
The peristaltic movements are
involuntary aof moving and mixing fnd they have the functionood along the
digestive tube. Peristaltic movement
deficiency, for example, in injuries of the innervation of case ofthe
muscular wall of the digestive tube
caused by Chagas’ disease, can the interruption of the food traffic insidelead to (^)
the bowels and to severe clinical
consequences like megacolon enlargement of the colon) and(abnormal
megaesophagus (enlargement of the
esophagus).
- From the lumen to the
external surface what are the
tissues that form the digestive
tube wall?
From the internal surface to the external
surface, thof mucosa (epithelial tissue responsiblee digestive tube wall is made
for the intestinal absorption),submucosa (conthe mucous memnective tissue bbrane and where bloodeneath (^)
and lymphatic vessels and neural fibers
are located), muscle tissue,muscle layers (smo two layers, one interioroth (^)
circular and other exterior longitudinal,
structures rmovement), seroesponsible fus membraneor the peristaltic
(associated epithelial and connective
tissue fthe organ). In the bowels thorming the external sure serousface of
membrane prolongs to form the
mesentevessels and supports the bowels withinry, a serosa that encloses blood
the abdominal cavity.
- What is the location of the
salivary glands in humans?
There are 6 major salivarythey are located one in each p glands andarotid
gland, two beneath the mandibles
(submandibular) the tongue (sublingual). Mand two in ore than 70the base of 0
other minor salivary glands exist
dispersepalate and on the lip mucosa, gid pharynx. ngiva, - What is the approximate
pH of the salivary secretion?
Is it an acid or basic fluid?
What are the main functions
of saliva?
The saliva pH is approximately 6.8. It is
thus a slightly acid pH.
Saliva lubricates the food bolus and
initiates the digestion of food. It also works as aenzymatic extracellular (^)
http://www.biology-questions-and-answers.com