BIOS 256 EXAM 2 - –Answer - innervates the smooth muscle layers...

SUBSCRIBE

BIOS 256 EXAM 2

• Describe the role of the myenteric plexus and innervation in the GI tract.

–Answer - innervates the smooth muscle layers, to control motility

• Define deglutition

–Answer swallowing

• Define mastication

–Answer chewing; mixed with saliva to make bolus

• Define emulsification

–Answer large lipid droplets are converted into smaller lipid droplets and giving them polarity

• Define peristalsis

–Answer contraction and relaxation of the longitudinal muscularis layer of the GI tract to push contents forward

• Describe the functions of the parietal and chief cells and the role of their secretions

–Answer Parietal –Answer

hydrochloric acid (HCl); intrinsic factor, and a hunger hormone ghrelin Chief –Answer

gastric lipase –Answer 1 / 2

SUBSCRIBE

aids in the digestion of lipids; pepsinogen –Answer inactive form of pepsin that aids in the digestion of proteins

• Accessory VS Essential Digestive Organs

–Answer Main organs –Answer

mouth, pharynx, esophagus, stomach, small intestine, large intestine, rectum, and anal canal Accessory organs –Answer

teeth and tongue, salivary glands, liver, gallbladder, pancreas, and vermiform ap- pendix

• Describe the roles played by both the liver and the gallbladder in digestion-

–Answer Liver –Answer Secretes bile which contributes to digestion Gallbladder –Answer concentrates and stores bile produced in the liver

• List and describe all the secretions of the pancreas

–Answer endocrine –Answer production of glucagon and insulin to moderate blood glucose levels; Pancreatic islets exocrine –Answer production of pancreatic juice to aid in the digestion of food in the small intestine

• Role of Oral cavity

–Answer ingestion of food, taste (gustation), chemical digestion, speech, and respiration

• / 2