Question 1

Which of the following best describes the 'origin' of a muscle?

Accepted Answer

The less movable tendon attachment of a muscle, typically located near the joint being moved.

Question 2

When performing a biceps curl, which muscle acts as the agonist and which as the antagonist?

Accepted Answer

Biceps brachii is the agonist; triceps brachii is the antagonist.

Question 3

Which muscle is primarily responsible for shoulder abduction?

Accepted Answer

Deltoid

Question 4

A patient is unable to extend their knee. Which muscle group is most likely impaired?

Accepted Answer

Quadriceps femoris

Question 5

Which muscle is the primary antagonist to the biceps brachii during elbow flexion?

Accepted Answer

Triceps brachii

Question 6

The gastrocnemius muscle inserts on which bone?

Accepted Answer

Calcaneus

Question 7

Which muscle is responsible for dorsiflexion of the foot?

Accepted Answer

Tibialis anterior

Question 8

If a person has difficulty adducting their thigh, which muscle group is most likely affected?

Accepted Answer

Adductor group

Question 9

Which muscle forms the bulk of the calf and is involved in plantar flexion?

Accepted Answer

Gastrocnemius

Question 10

During a sit-up, which muscle is primarily responsible for flexing the vertebral column?

Accepted Answer

Rectus abdominis

Question 11

Which muscle is located on the lateral side of the lower leg and is involved in eversion of the foot?

Accepted Answer

Fibularis longus

Question 12

Which of the following best defines the 'action' of a muscle?

Accepted Answer

The type of joint movement the muscle produces.

Question 13

A patient presents with weakness in elbow extension. Which muscle is most likely affected?

Accepted Answer

Triceps brachii

Question 14

Which muscle is primarily responsible for flexion of the hip?

Accepted Answer

Rectus femoris

Question 15

Which muscle is NOT part of the hamstring group?

Accepted Answer

Vastus lateralis

Question 16

Which muscle is responsible for protracting the scapula, as in pushing or punching?

Accepted Answer

Serratus anterior

Question 17

Which muscle is the primary mover for shoulder extension?

Accepted Answer

Latissimus dorsi

Question 18

Which muscle is located deep to the gastrocnemius and also contributes to plantar flexion?

Accepted Answer

Soleus

Question 19

Which muscle is primarily responsible for flexion of the forearm at the elbow, especially during rapid or forceful movements?

Accepted Answer

Brachioradialis

Question 20

Which muscle group is responsible for adduction of the thigh?

Accepted Answer

Adductor group

Muscular System: Structure, Function, and Key Muscles

Study Guide - Practice Questions