Which of the following muscles does not act in plantar flexion?

Which of the following muscles does not act in plantar flexion?

A) popliteus
B) tibialis posterior
C) flexor digitorum longus
D) gastrocnemius and soleus

Answer: A

Paralysis of which of the following would make an individual unable to flex the knee?

Paralysis of which of the following would make an individual unable to flex the knee?

A) hamstring muscles
B) gluteal muscles
C) brachioradialis
D) soleus

Answer: A

Which of the following muscles serves as a common intramuscular injection site, particularly in infants?

Which of the following muscles serves as a common intramuscular injection site, particularly in infants?

A) the vastus intermedius
B) the vastus medialis
C) rectus femoris
D) the vastus lateralis

Answer: D

Which of the following muscles is involved in inversion at the ankle joint?

Which of the following muscles is involved in inversion at the ankle joint?

A) tibialis anterior
B) extensor digitorum longus
C) peroneus tertius
D) peroneus longus

Answer: A

Which of the following muscles is a flexor of the thigh?

Which of the following muscles is a flexor of the thigh?

A) tibialis posterior
B) vastus lateralis
C) adductor magnus
D) gluteus maximus

Answer: C

Which of the following muscles is involved in abduction?

Which of the following muscles is involved in abduction?

A) deltoid
B) subscapularis
C) teres major
D) latissimus dorsi

Answer: A

Adductor magnus, adductor longus, and adductor brevis are parts of a large muscle mass of the ________.

Adductor magnus, adductor longus, and adductor brevis are parts of a large muscle mass of the ________.

A) lateral rotators
B) anterior compartment of the thigh
C) posterior muscle group of the thigh
D) medial compartment of the thigh

Answer: D

What do geniohyoid, hyoglossus, and stylohyoid have in common?

What do geniohyoid, hyoglossus, and stylohyoid have in common?

A) All names reflect direction of muscle fibers.
B) Each acts synergistically to elevate the jaw.
C) All act on the tongue.
D) All names indicate the relative size of the muscle.

Answer: C

First-class levers ________.

First-class levers ________.

A) have load at one end of the lever, fulcrum at the other, and effort applied somewhere in the middle
B) are typified by tweezers or forceps
C) in the body can operate at a mechanical advantage or mechanical disadvantage, depending on specific location
D) are the type found in the joints forming the ball of the foot as used in raising the body on the toes

Answer: C

Paralysis of which of the following would make an individual unable to flex the thigh?

Paralysis of which of the following would make an individual unable to flex the thigh?

A) biceps
B) vastus medialis
C) soleus
D) iliopsoas and rectus femoris

Answer: D

To exhale forcibly, one would contract the:

To exhale forcibly, one would contract the:

A) diaphragm alone.
B) internal intercostals and diaphragm.
C) external intercostals and diaphragm.
D) rectus abdominis and diaphragm.

Answer: B

Tennis players often complain about pain in the arm (forearm) that swings the racquet. What muscle is usually strained under these conditions?

Tennis players often complain about pain in the arm (forearm) that swings the racquet. What muscle is usually strained under these conditions?

A) the triceps brachii
B) the anconeus
C) the brachioradialis
D) the flexor digitorum profundus

Answer: C

The extensor digitorum longus has which type of fascicle arrangement?

The extensor digitorum longus has which type of fascicle arrangement?

A) circular
B) convergent
C) unipennate
D) bipennate

Answer: C

In a pennate muscle pattern ________.

In a pennate muscle pattern ________.

A) muscles appear to be straplike
B) there is a narrow origin diverging to a broad insertion
C) there is a broad origin and fascicles converge toward a single tendon
D) muscles look like a feather

Answer: D

Orbicularis oris ________.

Orbicularis oris ________.

A) closes, purses, and protrudes the lips
B) pulls the lower lip down and back
C) draws the eyebrows together
D) allows blinking, squinting, and various other protective mechanisms for the eye

Answer: A

In flexing the forearm at the elbow, the ________.

In flexing the forearm at the elbow, the ________.

A) biceps brachii acts as antagonist
B) triceps brachii acts as antagonist
C) brachioradialis acts as antagonist
D) coracobrachialis acts as antagonist

Answer: B

Which of these is not a way of classifying muscles?

Which of these is not a way of classifying muscles?

A) muscle location
B) the type of muscle fibers
C) the type of action they cause
D) muscle shape

Answer: B

Which generalization concerning movement by skeletal muscles is not true?

Which generalization concerning movement by skeletal muscles is not true?

A) Muscles produce movement by pulling on bones.
B) The bones serve as levers.
C) During contraction the two articulating bones move equally.
D) The movements produced may be of graded intensity.

Answer: C

Spasms of this straplike muscle often result in wry neck or torticollis.

Spasms of this straplike muscle often result in wry neck or torticollis.

A) serratus anterior
B) zygomaticus
C) platysma
D) sternocleidomastoid

Answer: D

A nursing infant develops a powerful sucking muscle that adults also use for whistling called the ________.

A nursing infant develops a powerful sucking muscle that adults also use for whistling called the ________.

A) platysma
B) masseter
C) zygomaticus
D) buccinator

Answer: D