QuestionSBA
QuestionChoice
This is where the trachea bifurcates and splits into the left and right primary (main) bronchi. It is located at the level of the sternal angle.
10023658
d
Carina
QuestionChoice
These cells are found in the walls of the alveoli and they form the squamous epithelium. This allows for a very small barrier for gaseous exchange, therefore increasing the concentration of oxygen getting into the capillaries and carbon dioxide leaving the capillaries.
10023656
b
Type 1 pneumocytes
QuestionChoice
These cells are found in the walls of alveoli and their main role is to produce surfactant. Surfactant is produced to prevent the collapse of the alveoli when there is positive pressure in the lungs (during expiration).
10023655
a
Type 2 pneumocytes
QuestionChoice
Bronchioles have ciliated columnar epithelium with very few goblet cells. They do not contain cartilage or submucosal glands as the walls are mostly smooth muscle. Bronchioles do not secrete surfactant or mucus.
10023657
c
Bronchioles
QuestionChoice
The visceral pleura covers the lungs and is adherent to all its surfaces. It contains a small volume of serous fluid, which has 2 major functions:

* Lubricates the surface of the pleurae, allowing them to slide over each other
* Produces surface tension, pulling the parietal and visceral pleura together – this ensures that when the thorax expands, the lungs also expand, allowing it to be filled up with air.

The visceral pleura does not secrete surfactant.
10023659
e
Visceral pleura
Concept
Chapter
2693
4199
Surfactant
Topic
150
Respiratory physiology
17129
A 34-week-old premature neonate is being treated for respiratory distress. The neonatal consultant suspects that they are deficient in surfactant.

What is responsible for producing surfactant in the lungs?
a