Thoracic Muscles: Interactive Quiz for Anatomy Students

Question 1

Which nerve supplies the diaphragm with motor impulses?

Accepted Answer

Phrenic nerve

Answer

Vagus nerve

Answer

Intercostal nerve

Answer

Brachial plexus

Question 2

Which muscle separates the thoracic cavity from the abdominal cavity?

Accepted Answer

Diaphragm

Answer

Transversus abdominis

Answer

Obliquus internus abdominis

Answer

Obliquus externus abdominis

Question 3

During forceful exhalation, which muscle group is primarily responsible for expelling air from the lungs?

Accepted Answer

Abdominal muscles

Answer

Intercostal muscles

Answer

Diaphragm

Answer

Pectoralis muscles

Question 4

The intercostal muscles are supplied by which nerve group?

Accepted Answer

Intercostal nerves

Answer

Phrenic nerve

Answer

Vagus nerve

Answer

Accessory nerve

Question 5

What is the main action of the pectoralis minor muscle?

Accepted Answer

Depressing the shoulder joint

Answer

Flexing the shoulder joint

Answer

Adducting the shoulder joint

Answer

Rotating the shoulder joint

Question 6

Which group of muscles assists in forced inspiration by elevating the ribs?

Accepted Answer

Accessory muscles of inspiration

Answer

Intercostal muscles

Answer

Abdominal muscles

Answer

Pectoralis muscles

Question 7

Which of the following muscles is the primary elevator of the first rib during inspiration?

Accepted Answer

Scalene anterior

Answer

Sternomastoid

Answer

Trapezius

Answer

Subclavius

Question 8

The diaphragm is innervated by which of the following nerves?

Accepted Answer

Phrenic nerve

Answer

Intercostal nerves

Answer

Vagus nerve

Answer

Spinal accessory nerve

Question 9

Which group of intercostal muscles is primarily responsible for forced expiration?

Accepted Answer

External intercostals

Answer

Internal intercostals

Answer

Transversus thoracis

Answer

Latissimus dorsi

Question 10

The primary function of the transverse thoracis muscle is to:

Accepted Answer

Stabilize the thoracic wall

Answer

Facilitate inspiration

Answer

Facilitate expiration

Answer

Move the scapula

Question 11

Which muscle originates from the costal cartilages and inserts onto the sternum?

Accepted Answer

Pectoralis major

Answer

Rectus abdominis

Answer

Intercostalis externus

Answer

Transversus thoracis

Question 12

The nerve that supplies the serratus posterior superior muscle is the:

Accepted Answer

Long thoracic nerve

Answer

Phrenic nerve

Answer

Dorsal scapular nerve

Answer

Subclavian nerve

Question 13

The main blood supply to the intercostal muscles is provided by the:

Accepted Answer

Internal thoracic artery

Answer

Phrenic artery

Answer

Subclavian artery

Answer

Aorta

Question 14

Which of the following is NOT a structure located within the mediastinum?

Accepted Answer

Transversus thoracis

Answer

Esophagus

Answer

Trachea

Answer

Thymus

Question 15

The internal intercostal muscles primarily function to:

Accepted Answer

Depress the ribs

Answer

Elevate the ribs

Answer

Stabilize the thoracic wall

Answer

Move the diaphragm

Question 16

Which nerve innervates the serratus anterior muscle?

Accepted Answer

Long thoracic nerve

Answer

Phrenic nerve

Answer

Vagus nerve

Answer

Axillary nerve

Question 17

What is the primary function of the diaphragm?

Accepted Answer

Separating the thoracic and abdominal cavities

Answer

Stabilizing the vertebral column

Answer

Pumping blood through the heart

Answer

Facilitating the passage of food into the stomach

Question 18

What is the primary insertion point of the pectoralis major muscle?

Accepted Answer

Humerus

Answer

Sternum

Answer

Clavicle

Answer

Scapula

Question 19

Which nerve innervates the latissimus dorsi muscle?

Accepted Answer

Thoracodorsal nerve

Answer

Axillary nerve

Answer

Radial nerve

Answer

Musculocutaneous nerve

Question 20

What is the primary function of the transversus thoracis muscle?

Accepted Answer

Stabilizing the thoracic cage

Answer

Rotating the sternum

Answer

Elevating the ribs

Answer

Compressing the thorax

Question 21

Which of the following muscles is primarily innervated by the phrenic nerve?

Accepted Answer

Diaphragm

Answer

Serratus anterior

Answer

Intercostalis externus

Answer

Transversus thoracis

Question 22

The only muscle directly innervated by the phrenic nerve is the:

Accepted Answer

Diaphragm

Answer

Serratus anterior

Answer

Pectoralis major

Answer

External intercostal

Question 23

Which muscle primarily elevates the ribs during inspiration?

Accepted Answer

External intercostals

Answer

Diaphragm

Answer

Transversus thoracis

Answer

Internal intercostals

Question 24

The structure that separates the thoracic cavity from the abdominal cavity is the:

Accepted Answer

Diaphragm

Answer

Intercostalis internus

Answer

Transversus abdominis

Answer

Pectoralis minor

Question 25

Which of the following muscles is innervated by the long thoracic nerve?

Accepted Answer

Serratus anterior

Answer

Trapezius

Answer

Latissimus dorsi

Answer

Pectoralis major