Flashcards in Lung Structure Deck (103)
State Fick's Law of Diffusion as a formula
Where D is a molecule-specific diffusion constant, which accounts for the size of the molecule, membrane permeability and temperature
What type of epithelium is respiratory epithelium?
Pseudostratified columnar epithelium
In what part of the body are sounds produced by the lungs modified?
In the upper respiratory tract.
What is the overall aim of the respiratory system?
To get oxygen in and carbon dioxide out.
What are two types of defence mechanisms for the respiratory system other than nasal hairs?
Where do respiratory exchange surfaces receive blood from?
Arterioles of the pulmonary circuit,
How many generations of bronchial division are there?
23. They progressively get smaller
What is the role of the Laryngopharynx?
It extends from the hyoid bone to the entrance of the larynx and esophagus
Describe Alveolar Type II cells
Cubodial epithelial cells
Secrete pulmonary surfactant (which reduces surface tension)
What is the role of nasal hairs?
Particle filtration. They are a part of the respiratory defence system
Do bronchioles have smooth muscle?
What is an example of an aggressive pathogen which could damage the respiratory defence system?
What is the first line of defence in the respiratory defence mechanism?
Nasal hairs are the first line of defence in the respiratory defence mechanism.
How do respiratory surfaces receive blood supply?
Each lobule has an arteriole and venule.
What is the oral cavity more commonly known as?
What is each alveolus surrounded by?
A capillary network.
What does the terminal bronchiole branch into?
Do bronchioles have cartilage?
What are terminal bronchioles?
What is respiratory epithelium?
One of the major components of the respiratory defence system.
What shape can alveoli be described as?
A cup-shaped pouch
What does respiration refer to?
Two integrated processes: External Regulation and Internal Respiration
What occurs in external respiration?
Pulmonary ventilation – physical movement of air into and out of lungs
Gas diffusion – at lungs and in tissues
Transport of O2 and CO2
What is the role of the conducting section of the respiratory system?
To conduct air down the respiratory surfaces.
What is the role of the mediastinum?
The mediastinum separates the thoracic cavity into two distinct compartments
What are upper respiratory infections?
Colds, Flus, etc.
What does internal respiration involve?
The uptake of O2 and production of CO2 within individual cells
What is the mucociliary escalator also called?
What is an example of a genetic disease could damage the respiratory defence system?