MCQ 101
What type of muscle contraction occurs without changing muscle length?
A) Isometric
B) Eccentric
C) Concentric
D) Isokinetic
Answer: A) Isometric
Explanation: Isometric contractions maintain tension in the muscle without changing its length, such as holding a weight steady.
MCQ 102
What is the main action of the rectus abdominis muscle?
A) Flex the trunk
B) Rotate the trunk
C) Extend the trunk
D) Abduct the trunk
Answer: A) Flex the trunk
Explanation: The rectus abdominis muscle primarily functions to flex the trunk, as seen in movements like sit-ups.
MCQ 103
Which muscle group is primarily responsible for shoulder flexion?
A) Pectoralis major
B) Deltoids
C) Trapezius
D) A and B
Answer: D) A and B
Explanation: Both the pectoralis major and deltoids play key roles in flexing the shoulder joint.
MCQ 104
What is the primary function of the sternocleidomastoid muscle?
A) Flex the neck
B) Rotate the head
C) Extend the neck
D) A and B
Answer: D) A and B
Explanation: The sternocleidomastoid muscle flexes and rotates the neck, enabling movements like turning the head.
MCQ 105
Which of the following best describes the role of proprioceptors?
A) Control muscle contractions
B) Detect changes in joint position
C) Generate muscle energy
D) Facilitate blood flow
Answer: B) Detect changes in joint position
Explanation: Proprioceptors provide the central nervous system with information about body position and movement, helping maintain balance and coordination.
MCQ 106
What is the primary role of the latissimus dorsi muscle?
A) Adduct the arm
B) Flex the arm
C) Extend the arm
D) Rotate the arm
Answer: C) Extend the arm
Explanation: The latissimus dorsi muscle is primarily responsible for extending the arm, particularly during activities like pulling.
MCQ 107
Which muscle is responsible for elevating the rib cage during inspiration?
A) Diaphragm
B) Pectoralis major
C) Serratus anterior
D) Intercostal muscles
Answer: D) Intercostal muscles
Explanation: The intercostal muscles elevate the rib cage during inhalation, expanding the thoracic cavity.
MCQ 108
What type of joint is found between the first metacarpal and the trapezium bone of the wrist?
A) Hinge joint
B) Ball-and-socket joint
C) Saddle joint
D) Pivot joint
Answer: C) Saddle joint
Explanation: The carpometacarpal joint of the thumb is a saddle joint, allowing for a wide range of motion, including opposition.
MCQ 109
Which muscle is known as the “core” muscle group?
A) Rectus abdominis
B) Transverse abdominis
C) Multifidus
D) All of the above
Answer: D) All of the above
Explanation: The core includes multiple muscles such as the rectus abdominis, transverse abdominis, and multifidus, all contributing to trunk stability.
MCQ 110
What is the role of the flexor digitorum muscles?
A) Extend the fingers
B) Flex the fingers
C) Rotate the wrist
D) Abduct the fingers
Answer: B) Flex the fingers
Explanation: The flexor digitorum muscles are responsible for flexing the fingers, allowing for gripping and grasping actions.
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