RESPIRATORY Lecture 1-Intro

What is the primary function of the respiratory system?

• To regulate body temperature

• To supply oxygen and remove carbon dioxide

• To produce hormones

• To provide nutrients to cells

Which part of the respiratory system is located superior to the chest cavity?

• Larynx

• Bronchi

• Trachea

• Alveoli

What structure maintains the rigidity of the trachea?

• Mucous membranes

• Elastic fibers

• C-shaped cartilage rings

• Smooth muscle

How many lobes does the right lung have?

• 2

• 3

• 1

• 4

What is the site of gas exchange in the lungs?

• Trachea

• Alveoli

• Bronchioles

• Larynx

Which nerve fibers cause bronchoconstriction?

• Sympathetic fibers

• Motor fibers

• Parasympathetic fibers

• Sensory fibers

What is the term for the movement of air into and out of the alveoli?

• Diffusion

• Ventilation

• Osmosis

• Inhalation

What happens to intrapulmonic pressure during inhalation?

• It fluctuates randomly

• It remains constant

• It decreases

• It increases

Which muscles are primarily responsible for inhalation?

• Abdominal muscles

• Sternocleidomastoid muscles

• Diaphragm and external intercostal muscles

• Internal intercostal muscles

What is the role of hemoglobin in the blood?

• To transport carbon dioxide

• To carry oxygen

• To regulate pH

• To produce energy