NEET 2025 MCQ with Answer Explanation : “Locomotion and Movement”.

MCQ 121
What is the main function of the orbicularis oris muscle?

A) Close the eyes
B) Pucker the lips
C) Elevate the eyebrows
D) Move the cheeks

Answer: B) Pucker the lips
Explanation: The orbicularis oris muscle encircles the mouth and is primarily responsible for puckering the lips.

MCQ 122
Which muscle assists in the movement of the neck?

A) Rectus abdominis
B) Sternocleidomastoid
C) Latissimus dorsi
D) Trapezius

Answer: B) Sternocleidomastoid
Explanation: The sternocleidomastoid muscle flexes and rotates the neck, playing a key role in head movement.

MCQ 123
What is the primary function of the erector spinae muscles?

A) Flex the spine
B) Rotate the spine
C) Extend the spine
D) Stabilize the pelvis

Answer: C) Extend the spine
Explanation: The erector spinae muscles are responsible for extending and stabilizing the spine during various movements.

MCQ 124
Which of the following muscles is involved in plantar flexion of the foot?

A) Tibialis anterior
B) Gastrocnemius
C) Soleus
D) B and C

Answer: D) B and C
Explanation: Both the gastrocnemius and soleus muscles are responsible for plantar flexion, which allows the foot to point downward.

MCQ 125
What is the primary action of the flexor hallucis longus muscle?

A) Flex the big toe
B) Extend the big toe
C) Dorsiflex the foot
D) Evert the foot

Answer: A) Flex the big toe
Explanation: The flexor hallucis longus muscle is primarily responsible for flexing the big toe, assisting with movements like walking.

MCQ 126
Which muscle is primarily responsible for the movement of the tongue?

A) Styloglossus
B) Hyoglossus
C) Genioglossus
D) All of the above

Answer: D) All of the above
Explanation: All of these muscles contribute to the movement and positioning of the tongue.

MCQ 127
What is the primary action of the extensor digitorum muscle?

A) Flex the fingers
B) Extend the fingers
C) Abduct the fingers
D) Rotate the wrist

Answer: B) Extend the fingers
Explanation: The extensor digitorum muscle is responsible for extending the fingers at the knuckles.

MCQ 128
Which muscle assists in rotating the thigh laterally?

A) Gluteus maximus
B) Iliopsoas
C) Adductor longus
D) Sartorius

Answer: A) Gluteus maximus
Explanation: The gluteus maximus is involved in laterally rotating the thigh and extending the hip.

MCQ 129
What is the role of the biceps brachii during a pull-up?

A) Stabilize the shoulder
B) Extend the elbow
C) Flex the elbow
D) Rotate the shoulder

Answer: C) Flex the elbow
Explanation: During a pull-up, the biceps brachii flexes the elbow to pull the body upward.

MCQ 130
What is the primary action of the pectoralis major muscle?

A) Adduct the arm
B) Extend the arm
C) Flex the arm
D) A and C

Answer: D) A and C
Explanation: The pectoralis major is involved in both flexing and adducting the arm at the shoulder joint.