Type II Alveolar Cells | Pulmonary Surfactant

The video tutorial explains the differences between Type 1 and Type 2 alveolar cells, focusing on the role of Type 2 cells in producing pulmonary surfactant. This surfactant reduces surface tension in the alveoli, preventing collapse and ensuring efficient gas exchange. The tutorial also highlights the challenges faced by premature infants who lack surfactant production, leading to potential respiratory issues. Solutions such as ventilators and surfactant injections are discussed to aid these infants.

What is the primary structural difference between Type 1 and Type 2 alveolar cells?

• Type 1 cells are cuboidal, Type 2 are squamous

• Type 1 cells are squamous, Type 2 are cuboidal

• Both are squamous

• Both are cuboidal

What causes surface tension within the alveolus?

• Hydrogen bonding between water molecules

• Hydrogen bonding between carbon dioxide molecules

• Hydrogen bonding between oxygen molecules

• Hydrogen bonding between nitrogen molecules

What is the main function of pulmonary surfactant?

• To increase surface tension

• To decrease surface tension

• To increase alveolar size

• To decrease alveolar size

What is pulmonary surfactant primarily composed of?

• Proteins

• Carbohydrates

• Lipids

• Nucleic acids

Why do premature infants struggle with breathing?

• Their alveoli are too large

• They have too much pulmonary surfactant

• They lack pulmonary surfactant

• Their alveoli are too small

What is one solution for helping premature infants breathe?

• Decreasing room humidity

• Administering pulmonary surfactant injections

• Providing oxygen masks

• Increasing room temperature

What is another method used to assist premature infants with breathing?

• Using a nebulizer

• Using a ventilator

• Using a humidifier

• Using a dehumidifier