Respiratory Notes from Lecture and Book

What is the primary function of the respiratory system?

To provide oxygen to blood and remove carbon dioxide (CO2).

What are the main organs of the respiratory system?

Nose, pharynx, larynx, trachea, bronchi, and lungs.

What is the role of the conducting zone in the respiratory system?

Passages for air flow, including nostrils to bronchioles.

Which regions does the upper respiratory tract include?

Nose to larynx (head to neck).

What is the function of the epiglottis?

It directs food to the esophagus and prevents it from entering the airway.

What are the three regions of the pharynx?

Nasopharynx, oropharynx, and laryngopharynx.

What constitutes the gas exchange region in the lungs?

The alveoli, which are spongy sacs for gas exchange.

What is the function of the mucociliary escalator in the respiratory system?

It traps dust and particles in mucus and drives them upward to the pharynx for removal.

How does the diaphragm contribute to respiration?

It contracts to flatten and lower, increasing thoracic cavity volume and decreasing lung pressure.

What is the role of alveolar macrophages?

They identify and remove waste and particles in the alveoli.

What are the pleurae and their functions?

Serous membrane layers that reduce friction during breathing and help establish pressure gradients necessary for ventilation.

How does the respiratory center in the brain control breathing?

It allows conscious control of inhalation and exhalation based on feedback from chemoreceptors.

What influences gas exchange efficiency in the alveoli?

Gradient strength, surface area, and conditions like emphysema that reduce functional surface area.

What is the significance of the vocal cords in speech production?

They produce sound through vibrations, with pitch determined by the tension and force of airflow.

What happens to the pressure in the lungs during inspiration?

It decreases, allowing air to flow into the lungs.

What role do internal and external intercostal muscles play in respiration?

They prevent collapsing when the diaphragm lowers and help expand or contract the thoracic cavity.