BIOD151 Module 3 Exam Questions Answered Correctly Latest Update 2024
Two divisions of the digestive system - Answers alimentary canal and accessory organs
seven parts of the gastrointestinal tract - Answers mouth, pharynx, esophagus, stomach, small intestine, large intestine and anus
six digest...
two bones and membrane the tongue is attached to - Answers hyoid and mandible bone and
membranous lingual frenulum
How many teeth are in the human adult and what do they do? - Answers thirty-two teeth work together
to tear, crush and grind food to mechanically digest food.
What are the four types of teeth? - Answers incisors, canines, premolars, molars
incisors - Answers two, chisel shaped for biting
canine - Answers one pointed for tearing
pre-molars - Answers two fairly flat for grinding
molars - Answers three flat for crushing
What is the specific function of the salivary gland in the process of digestion? - Answers 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? - Answers 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 - Answers 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 - Answers compact mass of food formed by chewing of the teeth and reposition by the tongue.
three parts of the pharynx - Answers nasopharynx, oropharynx, laryngopharynx
, through which sections of the pharynx does air travel? food? - Answers air travels through all three
sections
food travels through oropharynx and laryngopharynx
What prevents food from entering the lungs and why is this necessary? - Answers The epiglottis covers
the esophagus and prevent aspiration of food and liquid.
Describe how the muscular layers in the pharynx assist with food passage. - Answers 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 - Answers 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 - Answers 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 - Answers crown, neck, root
three types of papillae - Answers filiform, fungiform, circumvallate
Which papillae contain taste buds - Answers Circumvallate and fungiform
Describe the shape of the stomach and its location relative to the abdomen and diaphragm. - Answers
stomach is a backward C-shaped organ located along the left side of the abdomen and below the
diaphragm
Describe the passage of food into and out of the stomach - Answers Food enters from the esophagus via
the cardioesophageal sphincter and exits the stomach via the pyloric sphincter into the small intestine
lesser curvature - Answers concave, extends inward on the shorter side of the stomach
greater curvature - Answers convex, extends outward on the shorter side of the stomach
lesser omentum - Answers serous membrane that attaches lesser curvature to the liver
greater omentum - Answers serous membrane which attaches greater curvature to the posterior wall of
the body
two functions of the stomach - Answers 1. Temporary storage area for food, storing up to two liters of
partially digested food.
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