Question 1

What is the primary function of the thoracic spine in biomechanics?

Accepted Answer

To provide stability and flexibility for upper body movements

Answer

To serve as the primary weight-bearing structure

Answer

To facilitate lower body movement exclusively

Answer

To solely protect the heart and lungs

Question 2

Which muscle group is primarily involved in the mechanics of inhalation during breathing?

Accepted Answer

The diaphragm and intercostal muscles

Answer

The latissimus dorsi

Answer

The abdominal muscles

Answer

The pectoralis major

Question 3

What is the primary biomechanical advantage of a hinged joint in the thorax, such as the costovertebral joint?

Accepted Answer

It allows for pivoting movements while maintaining stability

Answer

It prevents any movement

Answer

It restricts movements to a single plane

Answer

It allows for 360-degree rotation

Question 4

Which respiratory muscle is primarily responsible for increasing the volume of the thoracic cavity during deep inhalation?

Accepted Answer

Diaphragm

Answer

Rectus abdominis

Answer

Sternocleidomastoid

Answer

External oblique

Question 5

Which muscle is primarily responsible for elevating the ribs during inhalation?

Accepted Answer

External intercostal muscles

Answer

Pectoralis major

Answer

Serratus anterior

Answer

Internal intercostal muscles

Question 6

What is the function of the costal cartilage in the ribcage?

Accepted Answer

To provide flexibility and support to the ribcage.

Answer

To assist in respiratory muscle contraction.

Answer

To connect the ribs to the spine.

Answer

To protect the rib bones from fractures.

Question 7

Which type of rib is directly attached to the sternum via costal cartilage?

Accepted Answer

True ribs

Answer

Cervical ribs

Answer

Floating ribs

Answer

False ribs

Question 8

What is the primary role of the diaphragm in rib biomechanics?

Accepted Answer

To facilitate changes in intra-thoracic pressure.

Answer

To protect the heart from impact.

Answer

To assist in rib elevation.

Answer

To provide structural support to the ribs.

Question 9

What type of joint connects the ribs to the vertebrae?

Accepted Answer

Synovial joint

Answer

Fibrous joint

Answer

Suture joint

Answer

Cartilaginous joint

Question 10

What role does the diaphragm play in intra-abdominal pressure regulation?

Accepted Answer

It increases intra-abdominal pressure during contraction

Answer

It decreases thoracic pressure

Answer

It relaxes to allow abdominal expansion

Answer

It causes diaphragmatic hernias

Question 11

What is the primary type of muscle fiber predominantly found in the diaphragm?

Accepted Answer

Type I (slow-twitch) muscle fibers

Answer

Type IIa (fast-twitch oxidative) fibers

Answer

Type III (intermediate) fibers

Answer

Type IIb (fast-twitch glycolytic) fibers

Question 12

During the process of inspiration, what happens to the diaphragm?

Accepted Answer

It contracts and flattens

Answer

It remains stationary

Answer

It relaxes and bulges upward

Answer

It contracts and bulges upward

Question 13

What nerve is primarily responsible for innervating the diaphragm?

Accepted Answer

Phrenic nerve

Answer

Vagus nerve

Answer

Intercostal nerve

Answer

Glossopharyngeal nerve

Question 14

Costovertebral & costotransverse joints are mechanically linked as there is�

Accepted Answer

single axis of motion for elevation & depression of rib passing through centers of both joints

Answer

no axis of motion for elevation & depression of rib passing through centers of both joints

Answer

two axis of motion for elevation & depression of rib passing through centers of both joints

Answer

none of the above

Question 15

Anterior articulation of first rib is�

Accepted Answer

thicker & larger

Answer

smaller than all other ribs

Answer

thicker & smaller

Answer

only larger that 2nd rib

Question 16

Obliquity ________ from rib 1 to rib 10

Accepted Answer

increases

Answer

decreases

Answer

none of the above

Answer

does not change

Question 17

Ventilatory muscles are different from skeletal muscles as

Accepted Answer

Increased fatigue resistance & greater oxidative capacity

Answer

None

Answer

Actions of these muscles is not life-sustaining

Answer

have Voluntary control only

Question 18

Diaphragm accounts to inspirational force during quiet breathing

Accepted Answer

70-80%

Answer

40-50%

Answer

50-60%

Answer

80-90%

Question 19

What is�Zone of apposition?

Accepted Answer

Vertically travelling costal fibers of diaphragm forming a functional unit

Answer

Trasversely travelling costal fibers of form functional unit

Answer

Vertically travelling crural fibers of diaphragm forming a functional unit

Answer

Trasversely travelling crural fibers of form functional unit

Question 20

Which intercostal muscles are primarily active during normal, passive expiration?

Accepted Answer

None, it's primarily a passive process

Answer

Diaphragm

Answer

External intercostal muscles

Answer

Internal intercostal muscles

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