71) Visceral muscle differs in its embryonic origin from skeletal muscle because it is derived from
A) myotomes.
B) myotomes and somitomeres.
C) somitomeres.
D) splanchnic mesoderm.
72) The major muscles used in throwing a punch are the
A) latissimus dorsi and deltoid.
B) teres major and brachialis.
C) brachioradialis and biceps brachii.
D) serratus anterior and triceps brachii.
73) The biceps brachii operates in a ________-class lever system.
A) first
B) second
C) third
D) fourth
74) Based on their embryonic origin, which set of muscles is most closely related?
A) chewing muscles—tongue muscles
B) extrinsic eye muscles—pharyngeal constrictors
C) suprahyoid muscles—infrahyoid muscles
D) trapezius—erector spinae
75) The gastrocnemius operates in a ________-class lever system.
A) first
B) second
C) third
D) fourth
76) The deepest muscle of the anterior abdominal wall is the
A) external oblique.
B) transversus abdominis.
C) internal oblique.
D) rectus abdominis.
77) The external urethral sphincter
A) is part of the pelvic diaphragm.
B) is part of the uterus.
C) touches the deep transverse perineal muscle.
D) is smooth muscle that involuntarily inhibits urination when we are frightened.
78) The muscle used to depress the tongue is the
A) genioglossus.
B) hyoglossus.
C) styloglossus.
D) digastric.
79) Which set correctly matches the function of the designated muscle compartment?
A) anterior thigh—thigh extension
B) lateral leg—foot eversion
C) medial thigh—thigh abduction
D) posterior leg—dorsiflexion
80) The agonist for jaw closure is the
A) digastric (posterior head).
B) digastric (anterior head).
C) medial pterygoid.
D) masseter.