H. A&P Muscle Test Questions

What muscle flexes the elbow and has an origin point on the distal end of the humerus with an insertion point on the proximal end of the ulna? Brachialis Biceps brachii Deltoid Triceps brachii

Brachialis

A nursing infant develops a powerful sucking muscle that adults also use for whistling or blowing a trumpet called the ______. Zygomaticus Temporalis Platysma Masseter Buccinator

Buccinator

What muscle compresses the cheek (as in sucking); and holds food between the teeth during chewing? Buccinator Zygomaticus Masseter Sternocleidomastoid

Buccinator

What muscle has an origin point on the sacrum but extends the hip when forceful extension is required. Semitendinosus Biceps femoris Gluteus medius Gluteus maximus

Gluteus maximus

What two muscles closes the jaw and have insertion points on the mandible? Temporalis and Frontalis Buccinator and Masseter Masseter and Temporalis Zygomaticus and Buccinator

Masseter and Temporalis

Which one of the following is not a criterion generally used in naming muscles? Shape of the muscle Action of the muscle Number of origins of the muscle Method of attachment of the muscle to bone Relative size of the muscle

Method of attachment of the muscle to bone

What muscle only flexes the vertebral column and has insertion points at the sternum and ribs 5-7? Transverse oblique Internal oblique Rectus abdominis External oblique

Rectus abdominis

Which muscle helps compress the abdominal contents during defecation or childbirth? Deltoids Rectus abdominis Iliopsoas Trapezius

Rectus abdominis

The plasma membrane of a skeletal muscle cell is called the_______. Sarcoplasm Sarcolemma Sarcomere Sarcoplasmic reticulum

Sarcolemma

Which organelle stores calcium in muscle fibers? Sarcoplasm Sarcoplasmic reticulum Myofibril Sarcolemma

Sarcoplasmic reticulum

What muscle flexes the thigh on the hip and has an insertion point on the proximal end of the tibia? Iliopsoas Soleus Sartorius Vastus medialis

Sartorius

What is a muscle that flexes the knee and extends the hip and has an origin point on the ischial tuberosity? Soleus Semitendinosus Gastrocnemius Gluteus maximus

Semitendinosus

What muscle only plantar flexes the foot and has an insertion point on the heel bone the calcaneus? Soleus Tibialis anterior Sartorius Gastrocnemius

Soleus

What muscle flexes the neck and has origin points on the sternum and clavicle? Platysma Trapezius Occipitalis Sternocleidomastoid

Sternocleidomastoid

What muscle flexes the neck and laterally rotates the head? The muscle also has origin points on the sternum and clavicle with an insertion point on the temporal bone. Platysma Sternocleidomastoid Masseter Platysma

Sternocleidomastoid

While doing "jumping jacks" during an exercise class, your arms and legs move laterally away from the midline of your body. This motion is called ___________. Extension Circumduction Adduction Flexion Abduction

Abduction

Lead poisoning can cause a condition known as wrist drop in which the wrist is pronated or __________. The elbow flex The palms face posteriorly The palms face medially The palms face anteriorly

The palms face posteriorly

What muscle raises, retracts, and rotates the scapula? Trapezius Latissiumus dorsi Deltoid Sternocleidomastoid

Trapezius

One neuron and all the skeletal muscles it stimulates is known as a ___________. sarcoplasmic reticulum motor unit synaptic cleft neuromuscular junction

motor unit

What muscle not only plantar flexes the foot but also flexes the knee? Sartorius Gastrocnemius Tibialis anterior Soleus

Gastrocnemius

What enzyme breaks down acetylcholine into acetic acid and choline to prevent continued contraction of the muscle fiber? Calcium ions Sarcoplasmic reticulum Potassium ions Acetylcholinesterase

Acetylcholinesterase

The method that regenerates the most ATP during muscle activity is _______ Anaerobic pathway Direct Phosphorylation Lactic Acid Pathway Aerobic pathway

Aerobic pathway

What is covered by the endomysium? An individual muscle cell A fascicle Myofibrils An entire muscle

An individual muscle cell (AKA sarcomere)

Which method of regenerating ATP during muscle contraction can produce lactic acid? Aerobic respiration Anaerobic glycolysis Oxidative phosphorylation Creatine phosphate

Anaerobic glycolysis

What muscle flexes the elbow and supinates the forearm; and has an origin point on the scapula and an insertion point on the proximal end of the radius? Sartorius Biceps brachii Brachialis Sternocleidomastoid

Biceps brachii

Which of the following muscles are antagonist? Masseter temporalis Biceps brachii and triceps brachii Vastuss medialis and vastus lateralis Biceps femoris and biceps brachii Gastrocnemius and soleus

Biceps brachii and triceps brachii

Which of the following is not a function of the muscular system? Production of movement Generation of heat Maintenance of posture Stabilization of joints Blood cell formation

Blood cell formation

Like the biceps brachii muscle, which muscle is a prime mover in elbow flexion? Brachialis Deltoid Brachioradialis Triceps brachii

Brachialis

Which muscle forms the curved calf of the posterior (back) leg? Fibularis longus Gastrocnemius Soleus Tibialis anterior

Gastrocnemius

Striated involuntary muscle tissue is classified as ______ muscle Either smooth or skeletal Cardiac Skeletal Smooth

Cardiac

The arrangement of fascicles in orbicularis oris is ________. Pennate Circular Convergent Fusiform

Circular

What muscle abducts the humerus and has origin points on the spine of the scapula and clavicle? Platysma Deltoid Sternocleidomastoid Trapezius

Deltoid

What muscle (group) extends and laterally flexes the spine; and has insertion points along the ribs as well as the thoracic and cervical vertebrae? Trapezius Biceps brachii Erector spinae Latissimus dorsi

Erector spinae

Primary action of the erector spinae Extension Flexion Rotation Adduction

Extension

Type of movement that decreases the angle of the joint Supination Flexion Rotation Extension

Flexion

Which movement is antagonistic to extension? Flexion Supination Rotation Adduction Circumduction

Flexion

What muscle raises the eyebrows and has an origin point at the cranial aponeurosis? Temporalis Zygomaticus Masseter Frontalis

Frontalis

A smooth, sustained contraction, with no evidence of relaxation, is called __________. Summing of contractions Fused, or complete, tetanus Twitch Unfused, or incomplete, tetanus

Fused, or complete, tetanus

Which muscle group includes the biceps femoris, semimembranosus, and semitendinosus? Abdominal muscles Quadriceps group Hamstring group Adductor group

Hamstring group

Which muscle group includes the biceps femoris, semimembranosus, and semitendinosus? Quadriceps group Adductor group Abdominal muscles Hamstring group

Hamstring group

Paralysis of which of the following would make an individual unable to flex the hip? Iliopsoas Soleus Tibialis anterior Biceps femoris

Iliopsoas

What muscle (group) flexes the hip and has an origin point at the lumbar vertebrae? Sartorius Ilipsoas Tibialis anterior Vastus medialis

Ilipsoas

Leaning against an immovable wall while waiting for a bus is a type of ____________. Twitch Resistance exercise Isotonic contraction Isometric contraction

Isometric contraction

What is the main function of the quadriceps group? Arm flexion Foot inversion Hand supination Thigh abduction Knee extension

Knee extension

Which of the following consists of two large, flat muscles that cover the lower back? Triceps brachii Biceps brachii Deltoid Latissimus dorsi

Latissimus dorsi

An elderly man fell down his stairs and was diagnosed with an injury to his tibialis anterior muscle. Evaluate the following actions to determine how his mobility will be impaired in the coming weeks. Moving the foot up while walking Flexing the thigh Extending his knee Moving the foot down while walking Bending his knee

Moving the foot up while walking

The state of continuous partial muscle contractions is known as _______. Fused (complete) tetanus Muscle fatigue Twitch Muscle tone

Muscle tone

The gap between the axon terminal of a motor neuron and the sarcolemma of a skeletal muscle cell is called the _______. Sarcomere Neuromuscular Junction Cross Bridge Synaptic cleft Motor Unit

Neuromuscular Junction

What muscle blinks and closes the eye and has an origin point on the frontal bone and maxilla? Buccinator Orbicularis oris Masseter Orbicularis oculi

Orbicularis oculi

What muscle closes and protrudes lips and has origin points on the mandible and maxilla? Orbicularis oris Orbicularis oculi Zygomaticus Buccinator

Orbicularis oris

The point of muscle attachment to an immovable or less movable bone in known as the _________. Insertion Innervation Action Origin

Origin

What muscle adducts and flexes the humerus and has origin points on the sternum, clavicle, and the first 6 ribs? Pectoralis major Platysma Biceps brachii Sternocleidomastoid

Pectoralis major

Which of these muscles is located on the ventral (anterior) side of the body? Pectoralis major Occipitalis Latissimus dorsi Gluteus medius Gastrocnemius

Pectoralis major

What muscle tenses the skin of the neck (as in shaving) and has an insertion point at the tissues around the mouth? Platysma Occipitalis Sternocleidomastoid Trapezius

Platysma

Which of the following is a type isometric exercise in which muscles increase in size and strength? Jogging Biking Pushing against a wall Swimming

Pushing against a wall

What muscle flexes the spine laterally and also extends the spine while having an origin point on the Iliac crest? Latissimus dorsi Trapezius Quadratus lumborum Erector spinae

Quadratus lumborum

Type of movement that allows you to carry a soup bowl Rotation Supination Pronation Circumduction

Supination

Which of the following muscles acts as a synergist to the masseter and closes the jaw? Temporalis Buccinator Sternocleidomastoid Zygomaticus Frontalis

Temporalis

Which of the following is composed mostly of the protein myosin? All myofilaments Light bands Thin filaments Z discs Thick filaments

Thick filaments

What muscle dorsiflexes and inverts the foot? Soleus Gastrocnemius Tibialis anterior Sartorius

Tibialis anterior

What muscle extends the elbow? Brachioradialis Triceps brachii Biceps brachii Brachialis

Triceps brachii

Which of these muscles is the prime mover of elbow extension? Triceps brachii Brachialis Deltoid Latissimus dorsi Biceps brachii

Triceps brachii

What muscle raises the corner of the mouth and has an origin point on the zygomatic bone? Zygomaticus Masseter Temporalis Buccinator

Zygomaticus

Which facial muscle is considered the "smiling" muscle since it raises the corners of the mouth? Zygomaticus Orbicularis Oculi Frontalis Orbicularis oris

Zygomaticus

Muscle tissue has the ability to shorten when adequately stimulated, a characteristic known as ________ extensibility elasticity irritability contractility

contractility