Flashcards in Class 9: Digestive System Deck (85)
most absorption takes place in the
name the two anatomical subdivisions of the digestive system
-digestive tract (alimentary canal)
GI tract is lined with
within the lumen, the lining is made up of ...
stratified squamous epithelium
middle layer of GI tract is composed of...
nervous system for the GI tract...
enteric nervous system-controlled by medulla oblongata
the tough fibrous wrapping around the GI tract
smooth muscle (muscularis externa) is responsible for...
which plexuses go to the enteric nervous system?
Auerbach plexus is...
the nerves innervating the esophogus, stomach, and intestine
auerbach plexus is connected to which part of the brain?
the enteric nervous system functions completely dependently/independently of the cns
Autonomic nervous system exerts a significant influence on the...
enteric nervous system
motility and secretion of the digestive tract are controlled by
neural, hormonal, and paracrine mechanisms
neural control- 2 types of reflexes
hormones of digestive tracts
gastrin and secretin
chemical messengers are secreted into the bloodstream and stimulate distant parts of the
paracrine secretions are...
prostaglandins with a local effect
components of saliva
salivary amylase, lingual lipase, mucus, lysozyme, immunoglobulin A, elecrolytes
salivary amylase function
breaks down starches in the mouth
lingual lipase function...
enzyme that is activated by stomach acid and digests fat after the food is swallowed
binds and lubricates the mass of food and aids in swallowing
enzyme that kills bacteria
immunoglobulin A function
an antibody that inhibits bacterial growth
average pH of saliva
salivary gland in front of ear is called
what squirts saliva into the cheek?
pharynx is a...
muscular funnel that connects the oral cavity to the esophagus
the pharynx allows the entrance of air from the
nasal cavity to the larynx