Question

question 112
0.25 pts
in the right lung, the superior and middle lobes are separated by the:
horizontal fissure.
oblique fissure.
bronchopulmonary segments.
hilum.
question 113
0.25 pts
the eustachian tube connects the middle ear with the:
trachea.
nose.
nasopharynx.
oropharynx.
question 114
0.25 pts
the smallest branches of the bronchial tree are:
primary bronchi.
secondary bronchi.
tertiary bronchi.
bronchioles.

Explanation:

Question 112

To solve this, we recall lung anatomy: The right lung has three lobes (superior, middle, inferior). The horizontal fissure separates the superior and middle lobes, while the oblique fissure separates middle from inferior (and superior from inferior in left lung). Bronchopulmonary segments are lung divisions by bronchi, and hilum is the lung's root. So the correct answer is the horizontal fissure.

The eustachian (auditory) tube connects the middle ear to the nasopharynx. The trachea is part of the respiratory tract (not connected to middle ear), nose is external, oropharynx is behind the mouth. So the correct connection is to the nasopharynx.

The bronchial tree hierarchy: Primary bronchi (from trachea) → secondary (lobar) → tertiary (segmental) → bronchioles. Bronchioles are the smallest branches of the bronchial tree (before alveolar ducts). So the smallest are bronchioles.

Answer:

A. horizontal fissure

Question 113