Impulse sound can result in immediate hearing loss that may be permanent. The
structures of the inner ear may be severely damaged by such sounds. This
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hearing loss may be accompanied by tinnitus, a ringing, buzzing, or roaring in the ears
or head, which may subside over time. Hearing loss and tinnitus may be experienced
in one or both ears, and tinnitus may recur constantly or occasionally throughout a
lifetime. The structure of the hair cells is damaged by continuous exposure to loud
noise. This results in hearing loss and tinnitus. Exposure to impulse and continuous
noise may only cause a temporary loss of hearing. If hearing is recovered, the
temporary loss of hearing is called a temporary threshold shift. The temporary
threshold shift most often disappears within 16 to 48 hours after the exposure to the
loud noise. Millions of North Americans, including children, adolescents, young adults,
adults, and elderly persons, may develop noise-induced hearing loss.
b30_m1_l06_assign
MODULE 1: LESSON 6 ASSIGNMENT
This Module 1: Lesson 6 Assignment is worth 85 marks. You are responsible to know and
do both however you only have to submit one of the two parts to be graded.
(85 marks) Lesson 6 Assignment—Mechanoreception—the Ear
(15 marks) Part 2—Closed Written Response
This question is intended to give you practice in improving your thinking and writing skills.
It is similar to the data-based, closed-response written question that you will do on the
Diploma Exam. Based on the information in the context box, and your understanding of
the course, you are to provide very specific responses to the following list of questions.
You might wish to review the “directing words” found on page 761 of your textbook before
you write your responses. These directing words are used on your Diploma Exam and
the assessments in this course to help you develop your answer to written response
questions.
Use the information below to answer the next question.
(1 mark) 1. a. Identify the sensory receptors in the inner ear.
Answer:
(5 marks) b. Explain in detail how sound waves that are amplified by the ossicles are
The six receptors of the inner ear consist of the cochlea, two otolith organs
and three semicircular canals and share a common transduction unit made
up of a sensory hair cell, a first order sensory neuron and the synapse
between them.
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