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SHS 310 Exam 4 Questions with Correct
Answers for Specific Exam Mail
Deglutition
Ans: Placing food or liquid in oral cavity
Moving it backward to pharynx
Propelling it into esophagus
Letting it travel down to stomach
Eating and drinking
Ans: Require coordination of many structures
Coordination of lips, mandible, tongue, velum, pharynx, larynx, esophagus,
etc.
Esophagus
Ans: 20 cm flexible tube
Upper esophageal sphincter (cricopharyngeus muscle)
Lower esophageal sphincter
Pressures at rest
Ans: Oral cavity is 0
Esophagus is about -5 cmH2O
Stomach is about 5 cmH2O
Esophageal sphincter is 40 to 80 cmH2O
Passive forces
Pretest - Stuvia US
,2
Ans: Natural recoil of tissues
Surface tension
Gravity
Aeromechanical factors
Active forces
Ans: Contraction of muscles of respiration, larynx, pharynx and oral cavity
Four phases of swallowing
Ans: Oral preparatory
Oral transport
Pharyngeal transport
Esophageal transport
Oral preparatory phase for liquids
Ans: Liquid placed in oral cavity
Mandible elevates, lips close
Anterior tongue forms cup for bolus
Back of tongue contacts velum
Velopharyngeal port is open
Oral preparatory phase for food
Pretest - Stuvia US
, 3
Ans: Mastication
Mandible, teeth, lips, tongue, cheek grind and manipulate substance into
bolus
Bolus positioned on anterior surface of tongue
Velum contacts tongue
VP port open
3 to 20 seconds
Oral transport phase
Ans: Bolus moved back toward pharynx
Tongue tip elevates and squeezes bolus
Lips, cheeks compress
Velum elevates and pharyngeal walls constrict
Less than 0.5 seconds
Pharyngeal transport phase
Ans: Triggered when bolus passes anterior faucial pillars
Under automatic control
0.5 seconds
Velum elevates, pharyngeal walls constrict
Hyoid bone/larynx move upward and forward
Vocal folds close, epiglottis folds over
Tongue propels bolus into pharynx
Pharynx contracts
Bolus divides at pyriform sinuses
Cricopharyngeus relaxes
Pretest - Stuvia US
SHS 310 Exam 4 Questions with Correct
Answers for Specific Exam Mail
Deglutition
Ans: Placing food or liquid in oral cavity
Moving it backward to pharynx
Propelling it into esophagus
Letting it travel down to stomach
Eating and drinking
Ans: Require coordination of many structures
Coordination of lips, mandible, tongue, velum, pharynx, larynx, esophagus,
etc.
Esophagus
Ans: 20 cm flexible tube
Upper esophageal sphincter (cricopharyngeus muscle)
Lower esophageal sphincter
Pressures at rest
Ans: Oral cavity is 0
Esophagus is about -5 cmH2O
Stomach is about 5 cmH2O
Esophageal sphincter is 40 to 80 cmH2O
Passive forces
Pretest - Stuvia US
,2
Ans: Natural recoil of tissues
Surface tension
Gravity
Aeromechanical factors
Active forces
Ans: Contraction of muscles of respiration, larynx, pharynx and oral cavity
Four phases of swallowing
Ans: Oral preparatory
Oral transport
Pharyngeal transport
Esophageal transport
Oral preparatory phase for liquids
Ans: Liquid placed in oral cavity
Mandible elevates, lips close
Anterior tongue forms cup for bolus
Back of tongue contacts velum
Velopharyngeal port is open
Oral preparatory phase for food
Pretest - Stuvia US
, 3
Ans: Mastication
Mandible, teeth, lips, tongue, cheek grind and manipulate substance into
bolus
Bolus positioned on anterior surface of tongue
Velum contacts tongue
VP port open
3 to 20 seconds
Oral transport phase
Ans: Bolus moved back toward pharynx
Tongue tip elevates and squeezes bolus
Lips, cheeks compress
Velum elevates and pharyngeal walls constrict
Less than 0.5 seconds
Pharyngeal transport phase
Ans: Triggered when bolus passes anterior faucial pillars
Under automatic control
0.5 seconds
Velum elevates, pharyngeal walls constrict
Hyoid bone/larynx move upward and forward
Vocal folds close, epiglottis folds over
Tongue propels bolus into pharynx
Pharynx contracts
Bolus divides at pyriform sinuses
Cricopharyngeus relaxes
Pretest - Stuvia US
