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levers make muscles action more versatile by all of the following, except A) changing the location of the muscle\'s insertion B) changing the speedof movement produce by an applied force C) changing the distance of movement produced by an applied force D) changing the stretch of an applied force E) changing the direction of an applied force
A
the more movable end of a muscle is the A) insertion B) belly C) origin D) proximal end E) distal end
A) insertion
the strongest masticatory muscle is the _________ muscle. A) pterygoid B) masseter C) temporalis D) mandible
B) masseter
the muscle that rotates the eye medially is the _________ muscle. A) superior oblique B) inferior rectus C) medial rectus D) lateral rectus
C) medial rectus
The major extensor of the elbow is the ____________ mucsle. A) triceps brachii B) biceps brachii C) deltoid D) subscapularis
A) triceps brachii
The muscles that rotate the radius without producing either flexion or extension of the elbow are the _____ muscles. A) brachialis & brachioradialis B) pornator teres & supinator C) biceps brachii & triceps brachii D) A, B, & C
B) pornatorteres & supinator
The powerful flexors of the hip are the ___________ muscles. A) piriformis B) obturator C) pectineus D) ilopsoas
D) ilopsoas
Knee extensors known as the quadriceps consists of the A) three vastus muscles & the rectus fremoris muscle B) biceps femoris, gracilis, & sartorius muscles C) popliteus, iliopsoas, & gracilis musles D) gastrocnemius, tibialis, & peroneus muscles
A) three vastus muscles& the rectus fremoris muscle
Which of the following actions illustrates a second-class lever A) knee extension B) ankle extension (planter flexion) C) flexion at the elbow D) A,B, & C
B) ankle extension (planter flexion)
Arm & leg muscles are arranged in antagonistic pairs. How does this affect their functioning? A) It provides a backup if one of the muscles is injured B) One muscle of the pair pushes while the other pulls C) A single neuron controls both of them D) It allows the muscles to produce opposing movement
D) It allows the muscles to produce opposing movement
Muscle A & muscle B are the same size, but muscle A is capable of much fine control that muscle B. Which of the following is likely to be true of muscle A? A) It is controlled by more nerons than muscle B B) It contains fewer motor units than muscle B C) It is controlled by fewer neurons than muscle B D) Each of its motor units consists of more cells than the motor units of muscle B
A) It is controlled by more neurons than muscle B
Gluteus maximus A) action of the muscle B) shape of the muscle C) location of the muscle\'s origin &/ or insertion D) number of origins E) location of muscles relative to a bone or body region F) direction in which the muscle fibers run relative to some imaginary line G) relative size of the muscle
E, G
Adductor magnus A) action of the muscle B) shape of the muscle C) location of the muscle\'s origin &/ or insertion D) number of origins E) location of muscle relative to a bone or body region F) direction in which the muscle fibers run relative to some imaginary line G) relative size of the muscle
A, G
Biceps femoris A) action of the muscles B) shape of the muscles C) location of the muscle\'s origin &/ or insertion D) number of origins E) location of muscle relative to a bone or body region F) direction in which the muscle fibers run relative to some imaginary line G) relative size of the muscle
D, E
Transverse abdominis A) action of the muscle B) shape of the muscle C) location of the muscle\'s origin &/ or insertion D) number of origins E) location of muscle relative to a bone or body region F) direction in which the muscle fibers run relative tosome imainary line G) relative size of the muscle
E,F
Extensor carpi ulnaris A) action of the muscle B) shape of the muscle C) location of the muscle\'s origin &/ or insertion D) number of origins E) location of muscle relative to a bone or body region F) direction in which the muscle fibers run relative to some imaginary line G) relative size of the muscle
A, C, E
Trapezius A) action of the muscle B) shape of the origin C) location of the muscle\'s origin &/ or insertion D) number of origins E) location of muscle relative to a bone or body region F) direction in which the muscle fibers run relative to some imaginary line G) relative size of the muscle
B
Rectus femoris A) action of the muscle B) shape of the muscle C) location of the muscle\'s origin &/ or insertion D) number of origins E) location of muscle relative to a bone or body region F) direction in which the muscle fibers run relative to some imaginary line G) relative size of the muscle
E, F
External oblique A) action of the muscle B) shape of the muscle C) location of the muscle\'s relative to a bone or body region D) number of origins E) location of muscle relative to a bone or body region F) direction in which the muscle fibers run relative to some imaginary line G) relative size of the muscle
E, F
used in smiling
zygomatic
used to suck in your cheeks
buccinator
used in winking
orbicularis oculi
used to form the horizontal frown crease on the forehead
frontalis
the \"kissing\" muscle
orbicularis oris
prime mover of jaw closure
masseter
synergist muscle for jaw closure
temporalis
prime mover of head flexion; a two-headed muscle
sternocleidomastoid
the name means \"straight muscle of the abdomen\"
rectus abdominis
prime mover for shoulder flexion & adduction
pectoralis major
prime mover for shoulder abduction
deltoid
part of the abdominal girdle; fogrms the external lateral walls of the abdomen
external oblique
acting alone, each muscle of this pair turns the head toward the opposite shoulder
sternocleidomastoid
besides the two abdominal muscles (pairs) named above, two muscle pairs that help form the natural abdominal girdle
internal oblique, transverse abdominis
deep muscles of the thorax that promote the inspiratory phase of breathing
external intercostal
an unpaired muscle that acts with the muscles named immediately above to accomplish inspiration
diaphragm
muscle that allows you to shrug your shoulders or extend your head
trapezius
muscle that adducts the shoulder & causes extension of the shoulder joint
latissimus dorsi
shoulder muscle that is the antagonist of the muscle just described (latissimus dorsi)
deltoid
prime mover of back extension; a deep composite muscle consisting of three columns
erector spinae
large paired superficial muscle of the lower back
latissimus dorsi
fleshy muscle forming part of the posterior abdominal wall that helps maintain upright posture
quadratus lumborum
hip flexor, deep in pelvis; a composite of two muscle
Iliopsoas
use to extend the hip when climbing stairs
gluteus maximus
\"toe dancer\'s\" muscle; a two-bellied muscle of the calf
gastrocnemius
inverts & dorsiflexes the foot
tibialis anterior
muscle group that allows you to draw your legs to the midline of your body, as when standing at attendtion
adductors
muscle group that extends the knee
quadriceps
muscle group that extends the thigh & flexes the knee
hamstrings
smaller hip muscle commonly used as an injection site
gluteus medius
muscle group of the lateral leg; plantar flex & evert the foot
fibularis muscles
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