Answer parts A-D to receive full credit for number 1: A. Which of the following is...

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Medical Sciences

Answer parts A-D to receive full credit for number 1:
A. Which of the following is most accurate concerningthe external ear?
The auricle is designed to sort waves by frequencybefore they reaching the external acoustic means
The external acoustic meatus direct sound waves towardsthe oval window
The external acoustic meatus lacks glands but has thickhairs that serve to protect the ear
The external acoustic meatus serves as a barrier toairborne particles
The tympanic membrane serves as the boundary between theexternal ear and middle ear
B. Which one is found in the inner ear:
Acoustic mucus
Eustachian tube
Ossicles
Scala vestibuli
Tympanic membrane
C. Which of the following do preganglionic axons of theANNS release?
Acetylcholine
Dopamine
Epinephrine
Norepinephrine
Serotonin
D. The muscles that regulate the passage of light intothe eye are found in _____
Cornea
Lens
Iris
Pupil
Retina

Answer & Explanation Solved by verified expert

4.1 Ratings (534 Votes)

AOption E The tympanic membrane serves as the boundary between the external ear and middle ear Ear pinnae help to direct the sound waves into the external acoustic meatus External acoustic meatus direct sound waves int the tympanic membrane External acoustic meatus have ceruminous gland which secrete cerumenit is a yellow waxy material taht protect the ear from the external particles External ear is See Answer

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