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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?

  1. The auricle is designed to sort waves by frequencybefore they reaching the external acoustic means

  2. The external acoustic meatus direct sound waves towardsthe oval window

  3. The external acoustic meatus lacks glands but has thickhairs that serve to protect the ear

  4. The external acoustic meatus serves as a barrier toairborne particles

  5. The tympanic membrane serves as the boundary between theexternal ear and middle ear

B. Which one is found in the inner ear:

  1. Acoustic mucus

  2. Eustachian tube

  3. Ossicles

  4. Scala vestibuli

  5. Tympanic membrane

C. Which of the following do preganglionic axons of theANNS release?

  1. Acetylcholine

  2. Dopamine

  3. Epinephrine

  4. Norepinephrine

  5. Serotonin

D. The muscles that regulate the passage of light intothe eye are found in _____

  1. Cornea

  2. Lens

  3. Iris

  4. Pupil

  5. 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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