BIOD 151 MODULE 3 WITH CORRECT QUESTIONS AND ANSWERS

BIOD 151 MODULE 3 WITH CORRECT QUESTIONS AND ANSWERS

What is the specific function of the salivary gland in the process of
digestion? - Food is mixed and moistened with the saliva secreted from the
salivary glands that contain enzymes that begin chemical digestion process
by breaking down starch.
Where are the taste buds located? - Primarily the tongue but also the
surface of the mouth and wall of the pharynx.
Describe the function of the tongue in the digestive process - tongue grips
the food, constantly repositioning it between the teeth and forms the bolus
that is pushed back to the pharynx to be swallowed.
bolus - compact mass of food formed by chewing of the teeth and reposition
by the tongue.
three parts of the pharynx - nasopharynx, oropharynx, laryngopharynx
through which sections of the pharynx does air travel? food? - air travels
through all three sections
food travels through oropharynx and laryngopharynx
What prevents food from entering the lungs and why is this necessary? -
The epiglottis covers the esophagus and prevent aspiration of food and
liquid.
Describe how the muscular layers in the pharynx assist with food passage. -
The two layers of muscle, circumferential outer layer and inner longitudinal
layer, alternatively contract to squeeze the food into the esophagus by
peristalsis.
Tissue layers of the esophagus - the innermost layer is the mucosa which
secretes mucus into the interior the gastrointestinal tract, the second layer
is the submucosa which contains blood and lymph vessels, lymph nodes,
nerves, and mucous glands, the third layer is the muscularis externa which
is made of two layers of muscle: the outer longitudinal fibers and inner
circumferential fibers and the outermost layer is the serosa which is made
up of cells that make serous fluid.
Peristalsis - the squeezing of food through the GI tract by the alternating
contraction of the sets of longitudinal and circumferential muscles.
three main divisions of the tooth - crown, neck, root
three types of papillae - filiform, fungiform, circumvallate
Which papillae contain taste buds - Circumvallate and fungiform
Describe the shape of the stomach and its location relative to the abdomen
and diaphragm. - stomach is a backward C-shaped organ located along the
left side of the abdomen and below the diaphragm
Two divisions of the digestive system - alimentary canal and accessory
organs
seven parts of the gastrointestinal tract - mouth, pharynx, esophagus,
stomach, small intestine, large intestine and anus
six digestive accessory organs - teeth, tongue, gallbladder, salivary glands,
liver, pancreas
mouth opening - lips
floor of the mouth - tongue
walls of the mouth - cheeks
roof of mouth - hard and soft palates
two bones and membrane the tongue is attached to - hyoid and mandible
bone and membranous lingual frenulum