Question 1

Which type of muscle fascicle arrangement allows for the greatest range of motion but typically produces the least force?

Accepted Answer

Parallel muscles

Question 2

A muscle that has fascicles arranged at an angle to a central tendon, such as the deltoid, is classified as which type?

Accepted Answer

Pennate muscle

Question 3

During elbow flexion, which muscle acts as the agonist (prime mover)?

Accepted Answer

Biceps brachii

Question 4

Which of the following best describes a first-class lever in the human body?

Accepted Answer

The fulcrum is between the applied force and the load

Question 5

If a muscle is named 'flexor carpi radialis,' what can you infer about its action and location?

Accepted Answer

It flexes the wrist on the radial side

Question 6

Which muscle is responsible for plantar flexion at the ankle and shares the calcaneal (Achilles) tendon?

Accepted Answer

Both gastrocnemius and soleus

Question 7

A patient is unable to abduct their arm at the shoulder. Which muscle is most likely impaired?

Accepted Answer

Deltoid

Question 8

Which of the following muscles is classified as an axial muscle and is primarily responsible for compressing the abdomen?

Accepted Answer

External oblique

Question 9

Which lever class is most common in the human body and is exemplified by the action of the biceps brachii during elbow flexion?

Accepted Answer

Third-class lever

Question 10

A muscle named 'biceps femoris' indicates which of the following structural characteristics?

Accepted Answer

It has two origins and is located in the thigh

Question 11

Which muscle group is primarily responsible for knee extension?

Accepted Answer

Quadriceps femoris

Question 12

A muscle that acts as a fixator during a movement serves what function?

Accepted Answer

It stabilizes the origin of the agonist by preventing movement at another joint

Question 13

Which of the following best describes the action of the orbicularis oris muscle?

Accepted Answer

Closes and purses the lips

Question 14

Which muscle is responsible for both flexion and medial rotation of the hip, and is part of the gluteal group?

Accepted Answer

Gluteus medius

Question 15

If a muscle is described as 'rectus,' what does this indicate about its fascicle arrangement?

Accepted Answer

Fascicles run parallel to the longitudinal axis

Question 16

Which of the following muscles is NOT part of the rotator cuff?

Accepted Answer

Teres major

Question 17

A patient presents with difficulty in plantar flexion and foot inversion. Which muscle is most likely affected?

Accepted Answer

Tibialis posterior

Question 18

Which muscle is primarily responsible for elevating the mandible during chewing?

Accepted Answer

Masseter

Question 19

Which of the following best describes the action of the sternocleidomastoid muscle when both sides contract simultaneously?

Accepted Answer

Flexes the neck

Question 20

A muscle named 'adductor longus' is most likely to:

Accepted Answer

Adduct the thigh and be long

Study Notes: The Muscular System (Anatomy & Physiology)

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