Multiple Choice
__________ are muscles that oppose or reverse a particular movement.
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10. Muscles
Muscle Actions
Back10. Muscles
Muscle Actions
- Textbook Question
The hamstring and quadriceps muscle groups are antagonists of each other, and each group is a prime mover in its own right. What action does each muscle group perform?
3views - Textbook Question
Mark the following statements as true or false. If the statement is false, correct it to make a true statement.
The main action of the zygomaticus major and minor muscles is to pull the corners of the mouth up to produce smiling.
- Textbook Question
Why is it difficult to lift a heavy object when the elbow is at full extension?
1views - Textbook Question
Mark the following statements as true or false. If the statement is false, correct it to make a true statement.
The rhomboid major and minor muscles retract the scapula.
1views - Textbook Question
Mr. Bell presents with the inability to move certain muscles on one side of his face. You ask him to make various facial expressions and find that on his right side he is unable to purse his lips, pull in his cheeks, elevate his upper lip, and smirk. What muscles is Mr. Bell unable to contract?
- Multiple ChoiceWhat is the primary action of the sternocleidomastoid muscle when it contracts unilaterally (one side only)?
- Multiple ChoiceWhat is the primary action of the frontalis muscle?
- Multiple ChoiceIn muscle actions, which term describes a muscle that opposes or reverses the movement produced by the prime mover (agonist)?
- Multiple ChoiceWhich muscle is the prime mover for abduction of the arm at the shoulder (glenohumeral) joint?1views
- Multiple ChoiceWhich of the following is NOT a member of the hamstrings?1views
- Multiple ChoiceWhich muscle action is primarily responsible for shrugging the shoulders?
- Textbook Question
Ms. Cho presents with muscle pain in the area around her anterior neck and superior chest. She explains that she has had a respiratory infection over the past 2 weeks that made it hard for her to breathe. What is likely causing her muscle soreness? (Hint: Remember that the origin and insertion of some muscles can switch and that one likely has to breathe more deeply with a respiratory infection.)
- Multiple ChoiceWhich of the following muscles does not act in plantar flexion?
- Multiple ChoiceWhich muscles are most likely to be overactive when knee valgus occurs during the overhead squat?1views