Question 1

Which of the following best describes the function of the external intercostal muscles during respiration?

Accepted Answer

They elevate the ribs during inspiration, increasing the volume of the thoracic cavity.

Question 2

A patient is unable to flex their forearm at the elbow after an injury. Which muscle is most likely impaired?

Accepted Answer

Biceps brachii

Question 3

Which of the following terms refers to a broad, flat tendon that connects muscles to each other or to bone?

Accepted Answer

Aponeurosis

Question 4

A soccer player suffers a strain to the muscle responsible for dorsiflexion and inversion of the foot. Which muscle is most likely affected?

Accepted Answer

Tibialis anterior

Question 5

Which muscle group is primarily responsible for extending the knee joint?

Accepted Answer

Quadriceps group

Question 6

During a physical exam, a patient is asked to raise their eyebrows and wrinkle their forehead. Which muscle is being tested?

Accepted Answer

Frontalis

Question 7

Which of the following best describes the action of the latissimus dorsi muscle?

Accepted Answer

Medially rotates, extends, and adducts the arm; draws down the shoulder

Question 8

A patient presents with difficulty abducting their arm at the shoulder. Which muscle is most likely weakened?

Accepted Answer

Deltoid

Question 9

Which of the following equations correctly represents the relationship between force, cross-sectional area, and muscle tension?

Accepted Answer

$$T = \sigma 	imes A$$

Question 10

A patient is unable to extend their forearm at the elbow. Which muscle is most likely paralyzed?

Accepted Answer

Triceps brachii

Question 11

Which muscle is responsible for compressing the abdomen and flexing the vertebral column?

Accepted Answer

Rectus abdominis

Question 12

A patient is unable to close their mouth tightly or pucker their lips. Which muscle is most likely affected?

Accepted Answer

Orbicularis oris

Question 13

Which of the following best describes the function of the diaphragm during inspiration?

Accepted Answer

It increases the vertical length of the thoracic cavity by contracting downward.

Question 14

A runner experiences pain in the posterior thigh and has difficulty flexing the knee. Which muscle group is most likely injured?

Accepted Answer

Hamstring group

Question 15

Which muscle is responsible for plantar flexion and inversion of the foot?

Accepted Answer

Soleus

Question 16

A patient is unable to rotate their head to the opposite side and flex their neck. Which muscle is most likely affected?

Accepted Answer

Sternocleidomastoid

Question 17

Which of the following is the correct definition of 'origin' in muscle terminology?

Accepted Answer

The fixed attachment point of a muscle, typically proximal to the body.

Question 18

A weightlifter is performing a biceps curl. Which type of muscle contraction is primarily occurring as the weight is lifted?

Accepted Answer

Concentric contraction

Question 19

Which muscle is responsible for flexing and abducting the wrist?

Accepted Answer

Flexor carpi radialis

Question 20

A patient is unable to extend their wrist and fingers after a humeral fracture. Which group of muscles is most likely affected?

Accepted Answer

Extensor group of the forearm

Muscle Tissue and Human Muscles: Structure, Terminology, and Major Groups

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