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