HUMAN ANATOMY
6th Edition
ISBN: 9781260210262
Author: SALADIN
Publisher: RENT MCG
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Textbook Question
Chapter 17.1, Problem 1AWYK
Braille uses symbols composed of dots that are raised about 1 mm from the page surface and spaced about 2.5mm apart, which a person scans with the fingertips. When a blind person reads braille, do you think he or she employs neurons with large receptive fields or small ones? Explain
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A scientist has dissected out a small section of the retina and is able to directly record the action potential firing rate in a single ganglion cell.
Assume there is a on-center off-surround bipolar cell connected to an on-center off-surround ganglion cell.
When applying ‘Stimulus 1’ the scientist records a moderate action potential rate. When applying ‘Stimulus 2’ the rate of action potentials increases substantially.
In the context of this experiment no illumination is an option as a 'Stimulus'.
‘Stimulus 2’ would result in what response in the bipolar cell (the one connected to the ganglion cell the scientist is measuring)?
A. A large depolarization of the bipolar cell membrane
B. The bipolar cell membrane would remain at the resting membrane potential
C. A large hyperpolarization of the bipolar cell membrane
D. A small hyperpolarization of the bipolar cell membrane
E. A small depolarization of the bipolar cell membrane
Then, analyze the following hypothetical situation: Cassey Madrid is a medical assistant at a medical office. He is testing visual acuity in patients for the first time and feels nervous about it. However, Cassey remembered when he did it in his clinical procedures class, so he takes a deep breath and calls the patient, Mr. Saleto. After identifying the patient and welcoming him in the room, Cassey explains the procedure to Mr. Saleto.
What should be the distance between Mr. Saleto and the Snellen chart?
What instructions can Casey give to Mr. Saleto if he uses glasses?
By using the Snellen chart, is Cassey testing distance or near visual acuity?
What does it mean if the result of the test is 20/60?
What are some nonverbal cues that may indicate that the patient is having difficulty reading the line to which Cassey is pointing?
PET (positron emission tomography) scans of the brains of people who have been blind since birth reveal high neural activity in the visual centers of the cerebral cortex when these people read Braille. However, when sighted individuals run their fingers over the raised letters of Braille, the visual centers do not show increased activity. Explain these experimental results.
Chapter 17 Solutions
HUMAN ANATOMY
Ch. 17.1 - Braille uses symbols composed of dots that are...Ch. 17.1 - Distinguish between general and special senses.Ch. 17.1 - Three schemes of receptor classification were...Ch. 17.1 - Prob. 3BYGOCh. 17.1 - Prob. 4BYGOCh. 17.1 - Prob. 5BYGOCh. 17.1 - Prob. 6BYGOCh. 17.2 - Prob. 1AWYKCh. 17.2 - What is the difference between a lingual papilla...Ch. 17.2 - Prob. 8BYGO
Ch. 17.2 - What part of an olfactory cell bears the binding...Ch. 17.2 - Prob. 10BYGOCh. 17.3 - Prob. 1AWYKCh. 17.3 - What is the benefit of having three auditory...Ch. 17.3 - Prob. 12BYGOCh. 17.3 - How does the brain recognize the difference...Ch. 17.3 - Prob. 14BYGOCh. 17.3 - Prob. 15BYGOCh. 17.4 - Prob. 1AWYKCh. 17.4 - Prob. 2AWYKCh. 17.4 - Prob. 3AWYKCh. 17.4 - Prob. 16BYGOCh. 17.4 - List as many structural and functional differences...Ch. 17.4 - Prob. 18BYGOCh. 17.4 - Prob. 19BYGOCh. 17.5 - Describe the contributions of the first pharyngeal...Ch. 17.5 - Prob. 21BYGOCh. 17.5 - Prob. 22BYGOCh. 17.5 - Prob. 23BYGOCh. 17 - The meaning of sensory receptor and the range of...Ch. 17 - Prob. 17.1.2AYLOCh. 17 - Prob. 17.1.3AYLOCh. 17 - Prob. 17.1.4AYLOCh. 17 - Prob. 17.1.5AYLOCh. 17 - The types of sensory nerve endings considered to...Ch. 17 - Prob. 17.1.7AYLOCh. 17 - Prob. 17.1.8AYLOCh. 17 - Prob. 17.1.9AYLOCh. 17 - Prob. 17.1.10AYLOCh. 17 - Prob. 17.1.11AYLOCh. 17 - Prob. 17.1.12AYLOCh. 17 - Prob. 17.1.13AYLOCh. 17 - The relationship of taste buds to the lingual...Ch. 17 - Prob. 17.2.2AYLOCh. 17 - Prob. 17.2.3AYLOCh. 17 - Prob. 17.2.4AYLOCh. 17 - Prob. 17.2.5AYLOCh. 17 - Prob. 17.2.6AYLOCh. 17 - Prob. 17.2.7AYLOCh. 17 - Prob. 17.3.1AYLOCh. 17 - Prob. 17.3.2AYLOCh. 17 - The parts of the middle ear, including its three...Ch. 17 - Prob. 17.3.4AYLOCh. 17 - The anatomy of the cochlea and the functional...Ch. 17 - Prob. 17.3.6AYLOCh. 17 - How cochlear function enables the brain to...Ch. 17 - Prob. 17.3.8AYLOCh. 17 - The differences between static and dynamic...Ch. 17 - Prob. 17.3.10AYLOCh. 17 - The action of the otolithic membrane in...Ch. 17 - Prob. 17.3.12AYLOCh. 17 - Prob. 17.3.13AYLOCh. 17 - The projection pathways taken by signals of...Ch. 17 - Prob. 17.4.1AYLOCh. 17 - Prob. 17.4.2AYLOCh. 17 - Prob. 17.4.3AYLOCh. 17 - Prob. 17.4.4AYLOCh. 17 - Prob. 17.4.5AYLOCh. 17 - Prob. 17.4.6AYLOCh. 17 - Prob. 17.4.7AYLOCh. 17 - Prob. 17.4.8AYLOCh. 17 - Prob. 17.4.9AYLOCh. 17 - The projection pathways taken by retinal signals...Ch. 17 - Prob. 17.4.11AYLOCh. 17 - Prob. 17.5.1AYLOCh. 17 - Prob. 17.5.2AYLOCh. 17 - Prob. 17.5.3AYLOCh. 17 - How the lens, vitreous body, anterior chamber,...Ch. 17 - Hot and cold stimuli are detected by free nerve...Ch. 17 - Prob. 2TYRCh. 17 - Prob. 3TYRCh. 17 - Prob. 4TYRCh. 17 - The sensory neurons that begin in the spiral organ...Ch. 17 - The spiral organ rests on the tympanic membrane....Ch. 17 - Prob. 7TYRCh. 17 - Prob. 8TYRCh. 17 - Prob. 9TYRCh. 17 - Prob. 10TYRCh. 17 - The most finely detailed vision occurs when an...Ch. 17 - Fibers of the optic nerve come from the...Ch. 17 - A sensory nerve ending specialized to detect...Ch. 17 - The gelatinous membranes of the macula sacculi and...Ch. 17 - Three rows of ____________ in the cochlea have...Ch. 17 - The __________ is a tiny bone that vibrates in the...Ch. 17 - The ___________ of the midbrain receive auditory...Ch. 17 - The apical microvilli of a gustatory cell are...Ch. 17 - Olfactory neurons synapse with mitral cells and...Ch. 17 - Prob. 20TYRCh. 17 - State a meaning of each word element and give a...Ch. 17 - State a meaning of each word element and give a...Ch. 17 - State a meaning of each word element and give a...Ch. 17 - State a meaning of each word element and give a...Ch. 17 - State a meaning of each word element and give a...Ch. 17 - State a meaning of each word element and give a...Ch. 17 - State a meaning of each word element and give a...Ch. 17 - Prob. 8BYMVCh. 17 - State a meaning of each word element and give a...Ch. 17 - Prob. 10BYMVCh. 17 - Briefly explain why each of the following...Ch. 17 - Briefly explain why each of the following...Ch. 17 - Briefly explain why each of the following...Ch. 17 - Briefly explain why each of the following...Ch. 17 - Briefly explain why each of the following...Ch. 17 - Prob. 6WWWTSCh. 17 - Prob. 7WWWTSCh. 17 - Prob. 8WWWTSCh. 17 - Briefly explain why each of the following...Ch. 17 - Briefly explain why each of the following...Ch. 17 - Prob. 1TYCCh. 17 - What type of cutaneous receptor enables you to...Ch. 17 - Predict the consequences of a hypothetical...Ch. 17 - Prob. 4TYCCh. 17 - Prob. 5TYC
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- Order the following cells in terms of the size of their receptive field, from smallest to largest: neuron in V4, neuron in V1,neuron in inferotemporal cortex, retinal ganglion cell.arrow_forwardWhen a person blinks, the part of the brain that interprets visual stimulation is suppressed. The spontaneous act of blinking is controlled by the area of the brain that controls involuntary movements such as breathing and blood pressure. To determine whether the lack of light or the act of blinking causes the suppression, scientists had subjects close their eyes and then placed a bright flashing light in their mouth to stimulate the photoreceptors in the eyes through the palate. Visual stimulation was still suppressed. So the photoreceptors in the retina were not stimulated even though they were exposed to light. This study demonstrated that when a person blinks, it is the act of blinking and not the absence of light that causes the suppression of visual stimulation. In the diagram above, identify the part of the brain that is suppressed during blinking and the part of the brain that controls involuntary, spontaneous blinking. Select one: a. 3 and 8 b. 2 and 9 c. 5 and 6 d. 1…arrow_forwardThe membrane potential of cells within the visual system is recorded in the dark, then following a brief flash of light. During the flash of light you would expect __________ cells to _____________ a rod cell; hyperpolarize b bipolar cell; depolarize c ganglion cell; depolarize d all of the above are correctarrow_forward
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