Quiz: A&P 1 muscle actions agonists and antagonists
Test your understanding of muscle actions, agonists, and antagonists in anatomy and physiology with this quiz set. Ideal for college students studying the muscular system.
Quiz(40 questions)
1. What is the action of bringing a limb closer to the midline of the body called?
Terms in this Study Set(40)
Muscle Actions(16)
What is flexion?
Flexion is a bending movement that decreases the angle between body parts. Example: Bending the elbow.
What is extension?
Extension is a straightening movement that increases the angle between body parts. Example: Straightening the knee.
True or False: Flexion always occurs in the sagittal plane.
True. Flexion primarily occurs in the sagittal plane, moving forward or backward.
What is rotation?
Rotation is the movement of a body part around an axis. Example: Turning the head side to side.
Fill in the blank: __________ is the opposite of flexion.
Extension is the opposite of flexion.
Compare flexion and extension.
Flexion decreases the angle; extension increases it. Both occur in the sagittal plane.
What is abduction?
Abduction is the movement away from the midline of the body. Example: Lifting arms sideways.
What is adduction?
Adduction is the movement toward the midline of the body. Example: Bringing arms back down to sides.
True or False: Adduction decreases the angle between body parts.
False. Adduction moves body parts toward the midline, not decreasing angles.
What is circumduction?
Circumduction is a circular movement involving flexion, extension, abduction, and adduction. Example: Arm circles.
Cause → Effect: What causes internal rotation?
Internal rotation occurs when a limb rotates towards the center of the body. Example: Rotating the shoulder inward.
What is dorsiflexion?
Dorsiflexion is the movement that raises the foot's dorsal surface. Example: Pulling toes upward.
What is plantarflexion?
Plantarflexion is the movement that points the foot down. Example: Standing on tiptoes.
True or False: Dorsiflexion is the same as plantarflexion.
False. Dorsiflexion lifts the foot; plantarflexion lowers it.
What is elevation?
Elevation is the movement of a body part superiorly. Example: Shrugging the shoulders.
What is depression?
Depression is the movement of a body part inferiorly. Example: Lowering the shoulders.
Agonists and Antagonists(12)
Agonist in elbow flexion?
Biceps brachii is the primary agonist, responsible for flexing the elbow.
True or False: Antagonists contract during movement.
False. Antagonists relax to allow the agonist to perform its action.
Identify the antagonist of knee extension.
Quadriceps group extends the knee; hamstrings are the antagonists, opposing this action.
What muscles are involved in shoulder abduction?
Deltoid (agonist) and pectoralis major (antagonist) work in opposition during this movement.
Fill in the blank: The _______ is the muscle that opposes the action of the agonist.
antagonist
Cause → Effect: What happens during a bicep curl?
Biceps brachii (agonist) contracts, while triceps brachii (antagonist) relaxes, allowing flexion.
Agonist during hip extension?
Gluteus maximus serves as the agonist, facilitating hip extension.
Compare agonists and antagonists.
- Agonists: primary movers - Antagonists: opposing muscles - Both crucial for smooth movement.
True or False: Agonists and antagonists work simultaneously.
True. They often work together to stabilize joints during movement.
What is the antagonist of shoulder flexion?
Latissimus dorsi acts as the antagonist during shoulder flexion.
Example of antagonistic pairs.
Biceps brachii and triceps brachii; one flexes, the other extends the elbow.
Agonist during wrist flexion?
Flexor carpi radialis is the main agonist when flexing the wrist.
Specific Muscle Groups(12)
What muscles are agonists in elbow flexion?
The primary agonists are the biceps brachii and brachialis.
True or False: The triceps brachii is an antagonist during elbow flexion.
True. The triceps brachii opposes the flexion action.
Identify the antagonists in knee extension.
The primary antagonists are the hamstrings: semitendinosus, semimembranosus, and biceps femoris.
Shoulder abduction: identify the agonists.
The deltoid (especially the middle fibers) and supraspinatus are the main agonists.
Fill in the blank: The ________ is the antagonist to the quadriceps during knee flexion.
hamstrings.
Compare actions of pectoralis major and latissimus dorsi.
Pectoralis major: shoulder flexion and adduction. Latissimus dorsi: shoulder extension and adduction.
What are the agonists in hip flexion?
The iliopsoas group (psoas major and iliacus) primarily acts as agonists.
True or False: The gluteus maximus is an agonist in hip extension.
True. It is the primary agonist during this action.
What muscles act as antagonists during wrist flexion?
The primary antagonists are the wrist extensors: extensor carpi radialis and extensor carpi ulnaris.
Cause → Effect: What happens when the sternocleidomastoid contracts?
It causes neck flexion and rotation to the opposite side.
Identify the agonists in dorsiflexion of the ankle.
The tibialis anterior is the primary agonist.
Fill in the blank: The ________ acts as an antagonist to the iliopsoas during hip extension.
gluteus maximus.
Questions in this Study Set(40)
1. What is the action of bringing a limb closer to the midline of the body called?
2. Which muscle acts as the agonist during elbow extension?
3. Which muscle group acts as agonists during knee flexion?
4. Which movement involves the straightening of a joint?
5. True or False: Antagonists are necessary to stabilize joints during movement.
6. True or False: The gluteus medius acts as an antagonist during hip adduction.
7. True or False: Abduction moves a body part closer to the midline.
8. Identify the antagonist of hip flexion.
9. What are the agonists during shoulder flexion?
10. What is the term for moving a limb in a circular motion?
11. Which muscle group is the agonist during shoulder adduction?
12. Fill in the blank: The ________ serves as the antagonist to the biceps brachii during elbow extension.
13. Which of the following is NOT a movement in the sagittal plane?
14. Fill in the blank: The _______ is the muscle that assists the agonist in performing its action.
15. Which muscle is NOT an agonist during hip extension?
16. What type of movement is raising the foot's toes towards the shin?
17. Cause → Effect: What occurs during a leg press exercise?
18. What happens when the rectus abdominis contracts?
19. What is the opposite of plantarflexion?
20. Which of the following is NOT an example of an antagonistic pair?
21. Identify the antagonists during wrist extension.
22. Fill in the blank: __________ is the movement of a body part downward.
23. Agonist during wrist extension?
24. During trunk rotation to the right, which muscle group acts as agonists?
25. Which movement involves turning a body part around its long axis?
26. Which muscle acts as the antagonist during knee flexion?
27. Which muscle is primarily responsible for ankle plantarflexion?
28. Which of the following describes the movement of lifting the shoulders towards the ears?
29. True or False: Agonists and antagonists can never act together.
30. True or False: The pectoralis major and latissimus dorsi perform opposite actions at the shoulder.
31. What is the action of moving a limb away from the midline of the body called?
32. What is the agonist when performing a pull-up?
33. Which muscle group serves as antagonists during elbow flexion?
34. True or False: Flexion always results in a decrease of the angle between body parts.
35. Which muscle acts as a fixator during shoulder movements?
36. What muscle acts as the agonist during dorsiflexion of the ankle?
37. Which movement would you use to describe standing on your tiptoes?
38. What occurs during internal rotation of a limb?
39. What type of action is circumduction?
40. Which of the following movements occurs when you move your arms away from your body?
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