External acoustic meatus connects auricle to:
Answer: C) Tympanic membrane. For Sensory System Ear Physiology, once you lock onto the key mechanism or definition, Tympanic membrane is the clear fit. If you restate the concept in your own words, excitable-cell physiology turns on membranes, ions, and signalling steps, and Tympanic membrane captures the correct piece of that story. So Tympanic membrane is the clean, accurate selection. If a similar stem appears later, start from the same core fact and you will land on the same kind of answer. In class notes, highlight this same phrase next to the related diagram so the wording and the picture reinforce each other.
Ref: Animal physiology is Unit 7 of the CSIR NET Life Science Syllabus, covering core body systems. It accounts for roughly 10% of the total marks in Sections B and C.