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BIO 181 REVIEW EXAMINATION QUESTIONS WITH COMPLETE SOLUTIONS

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BIO 181 REVIEW EXAMINATION QUESTIONS WITH COMPLETE SOLUTIONS What kind of epithelium lines the stomach - Answer-Simple What kind of epithelium lines the buccal - Answer-Stratified Submucosa - Answer-layer of dense irregular connective tissue Has large blood vessels, lymphatic vessels, & co...

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  • October 6, 2024
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  • BIO 181
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BIO 181 REVIEW EXAMINATION
QUESTIONS WITH COMPLETE
SOLUTIONS
What kind of epithelium lines the stomach - Answer-Simple

What kind of epithelium lines the buccal - Answer-Stratified

Submucosa - Answer-layer of dense irregular connective tissue
Has large blood vessels, lymphatic vessels, & contain exocrine glands.
Submucosal plexus

Why do we have a little bit of the nervous system located in the submucosa? - Answer-
Sends a signal about how that organ is feeling.

Smooth muscle cells arranged in two layers- inner circular layer & outer longitudinal
layer. - Answer-Muscularis Externa

Movement of digestive materials down the digestive tract
Coordinated rhythmic smooth muscle contractions - Answer-Peristalsis

What are the movements of the Muscularis externa and peristalsis controlled by? -
Answer-Enteric Nervous System (ENS)

Between circular and longitudinal muscle layers - Answer-Myenteric Plexus

Cycles of contraction
Churn and fragment the bolus
Mix contents with intestinal secretions
Does not have a set pattern
Does not push materials in any one direction - Answer-Segmentation

Serous membrane covering muscularis externa - Answer-Serosa

Functions of the oral cavity - Answer-Sensory analysis
Mechanical processing
Lubrication
Limited digestion

Functions of the tongue - Answer-Mechanical (compression, abrasion, & distortion)
Manipulation to assist in chewing and to prepare material for swallowing

, Sensory analysis (touch, temperature, taste)
Secrete mucin & lingual lipase

Bolus - Answer-Food after you chew on it

What are the 3 pairs of salivary glands? - Answer-parotid, submandibular, sublingual

Secretes salivary amylase (digests starch) - Answer-Parotid Salivary Gland

Produces mucous secretion that acts as lubricant and buffer - Answer-Sublingual
salivary glands

Secrete buffers, glycoproteins (mucins), and salivary amylase (ptyalin) - Answer-
Submandibular salivary glands

Why do we digest french fries so quickly? - Answer-Because french fries are made of
two things starch & fats.

How much salvia is produced per day? - Answer-1.5 L

What % of salvia is water - Answer-99.4%

How many enzymes are in salvia - Answer-0.6%

What is the purpose of salvia - Answer-Lubricates the mouth/food
Dissolves food that stimulate taste buds & provide sensory information
Initiate digestion of complex carbohydrates by the enzyme salivary amylase (ptyalin)

What are the 3 external regions of the teeth? - Answer-Crown, Neck, Root

How long does it take for fluoride to get into the enamel - Answer-2 minutes

Exposed portion of the tooth - Answer-Crown

Surrounded by gingiva - Answer-Neck

Base of the tooth. Sits beneath gums in bony alveolus - Answer-Root

Blade-shaped cutting teeth (1 root) - Answer-Incisors

Cone-shaped pointed teeth for tearing/slashing (1 root) - Answer-Cuspids (canines)

Flat crown used for grinding (1-2 roots) - Answer-Bicuspids (premolars)

Large flat crown for grinding (3+ roots) - Answer-Molars

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