Question

middle ear
the middle ear cavity, or tympanic cavity, is a small, air - filled, mucosa - lined cavity within the ( 1. ) bone. it is flanked laterally by the eardrum and medially by a bony wall with two openings, the oval window and the inferior, membrane - covered round window. the pharyngotympanic (think throat - eardrum: pharynx - tympanic) tube, or ( 2. ) tube, runs obliquely downward to link the middle ear cavity with the throat, and the mucosae lining the two regions are continuous. normally, the ( 3. ) tube is flattened and closed, but swallowing or yawning can open it briefly to equalize the pressure in the middle ear cavity with the external, or atmospheric, pressure. this is an important function because the eardrum does not vibrate freely unless the ( 4. ) on both of its surfaces is the same. when the pressures are unequal, the eardrum bulges inward or outward, causing hearing difficulty (voices may sound far away) and sometimes earaches. the ear - popping sensation of the pressures ( 5. ) is familiar to anyone who has flown in an airplane.
○ 1 temporal 2. auditory 3 pharyngotympanic 4 pressure 5 equalizing
○ 1 equalizing 2. temporal 3 auditory 4. pharyngotympanic 5 pressure
○ 1 auditory 2 pharyngotympanic 3 pressure 4. equalizing 5 temporal
○ 1 pressure 2 equalizing 3 temporal 4. auditory 5 pharyngotympanic
○ 1 pharyngotympanic 2 pressure 3 equalizing 4 temporal 5 auditory

Explanation:

1. The middle - ear cavity is within the temporal bone.
2. The pharyngotympanic tube is also called the auditory tube.
3. The pharyngotympanic tube is normally flattened.
4. The eardrum vibrates freely when pressure on both surfaces is the same.
5. The ear - popping sensation is due to pressures equalizing.

Answer:

1 temporal 2 auditory 3 pharyngotympanic 4 pressure 5 equalizing