Bio 152 Practice Exam 2 Questions With Complete Answers.
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Course
BIOD 152
Institution
BIOD 152
The bones in the middle ear act to:
a) filter out low frequency sounds.
b) transfer energy from the movement of the ear drum to the oval window.
c) amplify the signal before it reaches the oval window.
d) dampen sounds that are too loud.
e) Both b and c are correct. - Answer e) Both b and c...
Bio 152 Practice Exam 2 Questions With
Complete Answers.
The bones in the middle ear act to:
a) filter out low frequency sounds.
b) transfer energy from the movement of the ear drum to the oval window.
c) amplify the signal before it reaches the oval window.
d) dampen sounds that are too loud.
e) Both b and c are correct. - Answer e) Both b and c are correct.
If the oval window of the inner ear were punctured that person would lose the ability to:
a) hear high frequency sounds
b) hear low frequency sounds
c) hear middle frequency sounds
d) hear all sounds
e) it would cause no change to haring ability - Answer d) hear all sounds
In a population of field mice in the Sand Hills of Nebraska, some individuals have lighter coat colors than
others. Which of the following would be the most efficient way of determining whether the lighter coat
color is a heritable trait?
a) Obtaining DNA sequence from the individuals
b) Breeding the mice of both colors in the lab and observing the coat colors of their offspring
c) Performing a chemical analysis of the coat hairs
d) Conducting a field experiment to observe whether the lighter mice have a lower risk of predation than
the darker mice
e) Comparing the number of offspring produced by light- and dark-colored mice - Answer b) Breeding
the mice of both colors in the lab and observing the coat colors of their offspring
, A researcher is studying a mouse strain having the characteristic that exposure to light results in the
depolarization of photoreceptors. Mice of this strain have normally functioning photoreceptors, and
would respond to changes in light.
a) True
b) False - Answer b) False
Bats are able to hear frequencies of 100,000 cycles per second. The maximum firing rate of action
potentials is a few hundred per second. How is this possible?
a) Action potentials are not used to transmit auditory information. The output of the sensory neuron to
the brain is a graded potential.
b) The auditory system is special. Its neurons conduct signals very quickly and have no refractory period.
c) Sound wave frequency information is coded by differences in the location of vibrations along the
basilar membrane, not in action potential frequency.
d) None of the above. - Answer c) Sound wave frequency information is coded by differences in the
location of vibrations along the basilar membrane, not in action potential frequency.
The steps necessary for hearing include (1) amplification of sound waves, (2) transfer of sound vibrations
to fluid pressure waves, and (3) mechanoreception by hair cells of the cochlea. How are the sound
vibrations transferred to fluid pressure waves?
a) by the bones of the middle ear
b) through the oval window
c) by the tympanic membrane
d) by the action of the vestibular system - Answer a) by the bones of the middle ear
b) through the oval window
Sound waves are alternating regions of compression and decompression of molecules (i.e., molecules
crowd together and spread apart). The pitch of a sound depends on the ___________ of the sound wave
and sound intensity on the _________. a) amplitude; frequency
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