70 Questions
Which of the following word roots refers to muscle?
A) Myo/o
Which of the following word roots refers to strength?
D) Sthen/o
Which of the following word roots refers to the flesh?
C) Sarc/o
Which of the following terms refers to the attachment of a muscle to the bone or structure that does not move when the muscle contracts?
B) Origin
Which of the following terms refers to the attachment of a muscle to the bone or structure that does not move when the muscle contracts?
Insertion
Which of the following terms refers to a muscle that has an origin and insertion located in the same body region?
Intrinsic
What does the term extrinsic refer to in regard to muscle?
A muscle that has an origin and insertion located in different body regions
Which of the following terms refers to a muscle that has an origin and insertion located in different body regions?
B) Extrinsic
What does the term intrinsic describe in regard to muscle attachment?
A) The attachment of a muscle to the bone or structure that does not move when the muscle contracts
What does the term extrinsic describe in regard to muscle attachment?
B) The attachment of a muscle to the bone or structure that does move when the muscle contracts
Which of the following is the definition of a fixator?
A muscle that holds an origin stable for another muscle
Which of the following is the definition of a prime mover?
The main muscle that performs an action
Which of the following is the definition of a synergist?
A muscle that has the same action as the prime mover
Which term refers to a muscle that holds an origin stable for another muscle?
A) Fixator
Which term refers to muscles that have the same action?
B) Synergists
Which term refers to muscles that have opposite actions?
D) Antagonists
Which term describes moving a body part toward the midline?
Adduction
What is the term for the main muscle that performs an action?
Prime mover
If a person stands on their tiptoes with their heels off the floor, what action are they performing?
Plantar flexion
Which muscle action describes raising the shoulders or closing the jaw?
Elevation
What muscle action means to make a circle with part of the body?
Circumduction
If a person rotates the soles of their feet away from one another, what action are they performing?
Eversion
Which muscle action describes moving a body part toward the midline?
Medial excursion
What muscle action means to spin on an axis?
Rotation
If a person stands on their heels with their toes pointing up, what action are they performing?
Dorsiflexion
Which muscle action describes bringing the thumb into the palm?
B) Reposition
What muscle action describes raising the shoulders or closing the jaw?
C) Elevation
A hitchhiker is performing what muscle action with their thumb when trying to 'thumb' a ride?
A) Opposition
Which muscle action describes rotating the soles of the feet away from each other?
Eversion
If you can hold soup in the palm of your hand without spilling it, what muscle action are you performing?
Supination
What muscle action means to make a circle with part of the body?
Circumduction
Which muscle action means to spin on an axis?
Rotation
Which muscle action describes bringing the thumb into the palm?
Opposition
A hitchhiker is performing what muscle action with their thumb when trying to 'thumb' a ride?
Opposition
Which muscle action describes bringing the thumb into the palm?
A) Opposition
What muscle action describes raising the shoulders or closing the jaw?
C) Elevation
What muscle action describes rotating the soles of the feet away from each other?
B) Reposition
Which muscle action describes lowering the shoulders or opening the jaw?
Depression
Which of the following is not a muscle of the head or neck?
Pectoralis major
Which of the following is not found in the thorax or abdomen?
Orbicularis Oris
Which of the following muscles does not originate on the ribs?
External abdominal oblique
What is the function of the rectus abdominus?
To compress the abdomen
What is the insertion of the pectoralis major?
Humerus
Which of the following extends and laterally rotates the hip?
Gluteus maximus
Which theory of muscle contraction involves thick myofilaments grabbing thin myofilaments and pulling them toward the center of the sarcomere?
C) Sliding filament theory
What is a power stroke?
C) Myosin pulling on actin to draw Z-lines toward the center, shortening the sarcomere
Which theory of muscle contraction involves thick myofilaments grabbing thin myofilaments and pulling them toward the center of the sarcomere?
C) Sliding filament theory
Which of the following muscles is NOT part of the abdominal wall?
Pectoralis major
Which muscle does not originate on the ribs?
Diaphragm
What is the function of the gluteus maximus?
To extend and laterally rotate the hip
Which of the following muscles is not part of the hamstring group?
Gracilis
Which of the following muscles do not originate on the femur?
Rectus femoris
Which of the following muscles perform hip adduction?
Gracilis
Which muscle dorsiflexes and inverts the foot?
Tibialis anterior
Which of the following muscles inserts on the metacarpals and the carpals?
Extensor carpi ulnaris
In the forearm, where do all the flexors originate?
At the medial epicondyle of the humerus
What is the function of the sartorius?
To flex the knee and adduct the hip
Which one of these is the cell membrane of a muscle fiber called?
Sarcolemma
What are the functional units of a skeletal muscle fiber?
Sarcomere
Z-lines form the ends of what structure?
Sarcomere
Which of the following statements about sarcomeres is false?
Only thick myofilaments attach to Z-lines.
Which muscle is responsible for dorsiflexion and inversion of the foot?
Tibialis anterior
What is the connective tissue that surrounds a fascicle in a skeletal muscle?
Perimysium
What is the layer of connective tissue that surrounds an entire muscle called?
Epimysium
Which theory of muscle contraction involves thick myofilaments grabbing thin myofilaments and pulling them toward the center of the sarcomere?
Sliding filament theory
What is a power stroke?
Myosin pulling on actin to draw Z-lines toward the center, shortening the sarcomere
What theory of muscle contraction involves the threshold amount of acetylcholine fitting into receptors for a muscle's response to nerve stimulation?
Cross-bridge theory
Which of the following structures form the ends of a sarcomere?
Sarcomere
Which of the following statements about sarcomeres is false?
Only thick myofilaments attach to Z-lines.
Which term describes the ability of a muscle cell to be stretched and return to its original shape?
Extensibility
Test your knowledge of word roots related to muscles and strength in this quiz. Identify the correct word root for muscle, strength, flesh, and muscle attachment.
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