Respiratory System Quiz

What is the function of the pleural membranes?

• To lubricate the lungs during breathing

• To separate the lungs from the chest wall

• To maintain subatmospheric pressure in the pleural space

• To supply oxygen to the alveoli

Which blood vessels supply the airway walls in the lungs?

• Pulmonary arteries

• Pulmonary veins

• Bronchial arteries

• Bronchial veins

What is the role of the autonomic nervous system in lung function?

• To control voluntary breathing

• To regulate blood flow to the lungs

• To stimulate cough reflex

• To control airway smooth muscle tone

Which muscles are primarily responsible for quiet breathing?

• Diaphragm, parasternal intercostals, and scalenes

• Sternocleidomastoid, pectoralis major, and abdominals

• External intercostals and scalenes

• Internal intercostals and rectus abdominis

What is the main function of the diaphragm during inspiration?

• To elevate the sternum and anterior ends of ribs

• To compress the abdominal cavity

• To increase the vertical dimensions of the thorax

• To decrease the lower thoracic dimensions

Which muscles are considered accessory muscles of expiration?

• Scalenes

• Sternocleidomastoid

• Pectoralis major

• Rectus abdominis

What is the primary function of the pectoralis major muscle?

• To compress the abdominal cavity

• To elevate the sternum and anterior ends of ribs

• To assist in forced exhalation

• To assist in inspiration at rest

Which muscles are responsible for compressing the abdominal cavity during expiration?

• Scalenes

• Sternocleidomastoid

• Pectoralis major

• Abdominals

What is the role of the nonadrenergic noncholinergic (NANC) nerves in the lungs?

• To control airway smooth muscle tone

• To regulate blood flow to the lungs

• To stimulate cough reflex

• To maintain subatmospheric pressure in the pleural space

What is the purpose of the intercostal muscles?

• To elevate the sternum and anterior ends of ribs

• To compress the abdominal cavity

• To increase the vertical dimensions of the thorax

• To depress the ribs during expiration