Chapter 10: Sensory Systems
Questions and Answers
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1.The mechanism by which a receptor converts a stimulus into an electrical signal is called
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A.
Conduction
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B.
Convection
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C.
Transduction
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D.
Modulation
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E.
Propagation
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A.
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2.Which of the following best illustrates the concept of an adequate stimulus?
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A.
When a boxer gets punched in the eye, he perceives light
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B.
Rotation of the head stimulates certain receptors in the vestibular system but not those in the visual system
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C.
Information from different photoreceptors converges on a single ganglion cell that projects to the lateral geniculate nucleus.
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D.
Hair cells in the cochlea are stimulated by sound vibrations over a wide range of frequencies
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A.
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3.The ability to perceive different frequencies in sound vibrations is based on the fact that
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A.
The stereocilia of any given hair cell respond to one frequency only
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B.
Different areas of the basilar membrane resonate at different frequencies such that a sound of a particular frequency causes only a certain region of the membrane to vibrate
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C.
The frequency of action potentials in the cochlear nerve varies in proportion to the frequency of a sound stimulus
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A.
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4.The stereocilia for hearing are exposed to
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A.
Endolymph in the vestibular duct
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B.
Perilymph in the vestibular duct
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C.
Endolymph in the cochlear duct
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D.
Perilymph in the cochlear duct
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E.
Endolymph in the tympanic duct
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A.
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5.The parasympathetic nervous system causes
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A.
Contraction of the radial muscle of the iris
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B.
Contraction of the ciliary muscle
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C.
Pupillary dialation
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D.
A and c
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E.
All of the above
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A.
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6.The Two types of thermoreceptors are ___________ and _________.
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7.Receptors are most sensitive to energy from the _________ stimulus.
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8.A phasic receptor adapts (quickly/ slowly) to a constant stimulus
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9.The three types of nociceptors are __________, _________, and __________.
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10.Information about touch detected on the left side of the body is transmitted to the brain in the dorsal columns on the _________ side of the spinal cord.
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11.The first neurons that support production of action potentials in the visual pathway are (photoreceptors/ biopolar cells/ ganglion cells).
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12.The pitch of sound vibration reflects its (amplitutde/ frequency)
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13.A hair cell in the cochlea can be excited by sounds of different frequencies (true / false).
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14.The process by which the lens becomes stronger for close-up vision is called ____________.
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15.Rods and Cones differ with regard to the type of (retinal / opsin) they contain.
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16.A single ganglion cell will either be excited or inhibited by light applied to its visual field (True / false).
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17.Odorant molecules must be dissolved in mucus if they are to bind to olfactory receptors (True / False).
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18.A given taste receptor cell responds to only one of the four primary tastes (true / false).
