61.  How much saliva is generally produced each day?  
A.  ½ – 1 L
B.  1 – 1½ L
C.  2 – 3 L
D.  4 – 5 L

62.  Mastication  
A.  increases the surface area of food particles.
B.  decreases the efficiency of digestion.
C.  occurs in both the mouth and stomach.
D.  is never under voluntary control.
E.  decreases the surface area of food particles.

63.  Which part of the pharynx is NOT involved with food transport?  
A.  nasopharynx
B.  oropharynx
C.  laryngopharynx
D.  All the the choices are involved with food transport

64.  Food is prevented from entering the nasal cavity during swallowing by the  
A.  epiglottis.
B.  palatine tonsils.
C.  tongue.
D.  soft palate.
E.  hard palate.

65.  The epiglottis covers the opening into the larynx during  
A.  the voluntary phase of swallowing.
B.  the pharyngeal phase of swallowing.
C.  the esophageal phase of swallowing.
D.  the gastric phase of swallowing.
E.  the oral phase of swallowing.

66.  What structure moves food from the pharynx to the stomach?  
A.  larynx
B.  laryngopharynx
C.  esophagus
D.  epiglottis

67.  How does the muscularis layer of the esophagus differ from the rest of the digestive tract?  
A.  it is all skeletal muscle
B.  the superior part is skeletal muscle
C.  the inferior part is skeletal muscle
D.  it has alternating smooth and skeletal muscle sections

68.  Why does the superior part of the esophagus contain skeletal muscle instead of smooth muscle?  
A.  The first phase of swallowing is under involuntary control.
B.  The second phase of swallowing is under voluntary control.
C.  The first phase of swallowing is under voluntary control.
D.  The second phase of swallowing is under involuntary control.

69.  Which of the following is the correct order for the phases of deglutition?  
A.  pharyngeal, voluntary, esophageal
B.  esophageal, pharyngeal, voluntary
C.  voluntary, pharyngeal, esophageal
D.  voluntary, esophageal, pharyngeal

70.  Which of the following statements regarding swallowing is true?  
A.  The voluntary phase begins in the pharynx.
B.  In the pharyngeal phase, food is moved through the pharynx.
C.  The uvula rises during the esophageal phase.
D.  Peristalsis occurs in all phases of swallowing.
E.  Breathing occurs during swallowing.