LS7C Week 4A Pre-Class Reading Guide

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School

University of California, Los Angeles *

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Course

7C

Subject

Biology

Date

May 1, 2024

Type

pdf

Pages

2

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Name _____________________________________________ LS7C Week 4A Pre-Class Reading Guide Fill out this worksheet as you complete your pre-class assignments. Bring your completed worksheet to class to use as a reference for in-class activities. After completing your pre-class assignments, you should be able to: Identify critical cells involved in auditory and visual sensory transmission to the brain Describe how hair cells function to transduce mechanical signals to the brain Describe how photoreceptors change in response to light exposure 1. What different environmental stimuli can be transformed into nerve signals? Provide an example of each. 2. Label the following parts of the ear on the diagram below: outer ear, middle ear, inner ear, tympanic membrane (eardrum), middle ear bones, oval window, cochlea, and semicircular canals. Designate where you would find hair cells involved in auditory sensory transmission and hair cells involved in vestibular sensory transmission. 3. Refer to figures 35.18 in your textbook. Explain how hair cells function to transduce mechanical signals to the brain. In your explanation try to use the terms stereocilia, basilar membrane, tectorial membrane, depolarization, repolarization, and neurotransmitter.
4. Label the following parts of the eye on the diagram below: pupil, iris, lens, retina, rods, cones, and fovea. Designate where you would find a particularly high concentration of cone cells. 5. Refer to figures 35.19 and 35.21 in your textbook. Explain how rod and cone cells (photoreceptor cells) in your eye function to transduce light signals to the brain. In your explanation use the terms cis -retinal, trans- retinal, opsin, hyperpolarization, and neurotransmitter. 6. Explain the difference between the resting membrane potential of a nerve cell versus a vertebrate photoreceptor cell. 7. Distinguish between rod and cone cells. How are they similar? different?
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