Biol 223A Exam 4 Practice Questions
and Verified Solutions.
Graded A+
QUESTIONS AND ANSWERS
Olfactory sensory neurons are short-lived and, therefore, replaced frequently. How does
this turnover happen?
A. mitotic division and differentiation of odorants
B. mitotic division and differentiation of basal epithelial cells
C. mitotic division of olfactory sensory neurons
D. mitotic division and differentiation of supporting cells. ANSWER - B. mitotic division
and differentiation of basal epithelial cells
When the tympanic membrane vibrates with the same frequency as the incoming sound
waves it is known as:
A. amplitude.
B. resonance.
C. cycles.
D. hertz.
E. pitch.. ANSWER - B. resonance
*the right combination of frequencies and amplitudes including the tympanic membrane
will begin to vibrate at the same frequency as the sound = RESONANCE
The taste sensation that is triggered by the amino acid glutamate is known as:
A. peppery.
B. salty.
C. sweet.
D. sour.
E. umami. ANSWER - E. umami
A person with damage to this part of the brain (indicated by the arrow) will have normal
acoustic reflexes but will have difficulty performing which of the following functions?
,A. interpreting sounds and recognizing a pattern in them
B. directing input from the thalamus to the brainstem
C. sending auditory information to the midbrain
D. directing a variety of motor reflexes to sound. ANSWER - A. interpreting sounds and
recognizing a pattern in them
Which of these is NOT a type of photoreceptor?
A. red cone
B. blue cone
C. green cone
D. yellow cone. ANSWER - D. yellow cone
The following steps occur in rods when they are excited by photons of light. What is the
proper sequence for these steps?
1. Membrane sodium channels close.
2. Increased phosphodiesterase breaks down cGMP.
3. Retinal changes from the 11-cis form to the 11-trans form.
4. The membrane hyperpolarizes and the rate of neurotransmitter release declines.
5. Opsin activates transducin.
6. Opsin activation occurs.
A. 6, 3, 5, 2, 1, 4
B. 3, 6, 5, 2, 1, 4
C. 1, 6, 5, 2, 4, 3
D. 1, 3, 4, 5, 6, 2
E. 3, 6, 5, 1, 2, 4. ANSWER - B. 3, 6, 5, 2, 1, 4
In order:
1. retinal changes from the 11-cis form to 11-trans form
2. Opsin activation occurs
3. Opsin activates transducin
4. increased phosphodiesterase breaks down cGMP
5. Membrane sodium channels close
6. The membrane hyperpolarizes and the rate of neurotransmitter release declines
Which of the following is not one of the six primary taste sensations?
A. umami
B. salty
C. sour
D. peppery
E. sweet. ANSWER - D. peppery
, The ________ convey(s) information about head position with respect to gravity.
A. cochlea
B. utricle
C. ampulla
D. saccule
E. utricle and the saccule. ANSWER - E. utricle and the saccule
Olfactory information is sent to all of the following areas EXCEPT the __________.
A. thalamus
B. limbic system
C. olfactory cortex
D. hypothalamus. ANSWER - A. thalamus
Movement of the endolymph in the semicircular canals:
A. signals linear acceleration.
B. signals rotational movements.
C. allows us to hear low tones.
D. produces a rushing sound.
E. signals body position with respect to gravity.. ANSWER - B. signals rotational
movements
A sensory receptor characterized as a free nerve ending using the neurotransmitter,
Substance P, would most likely be a:
Mechanoreceptor
Thermoreceptor
Nociceptor
Photoreceptor
chemoreceptor. ANSWER - Nociceptor
Which of the following statements about hair cells is false?
A. Hair cells within the organ of corti respond when pushed against the tectorial membrane
B. Hair cells in the Uricle and saccule are activated by rotational movements.
C. Hair cells are embedded in a gelatinous mass called the cupula within the semicircular
ducts
D. Hair cells are mechanoreceptors
E. Hair cells depolarize as mechanically-gated potassioum channels open and potassium
enters the cell.. ANSWER - B. Hair cells in the Uricle and saccule are activated by
rotational movements.
Which of the following is FALSE?
and Verified Solutions.
Graded A+
QUESTIONS AND ANSWERS
Olfactory sensory neurons are short-lived and, therefore, replaced frequently. How does
this turnover happen?
A. mitotic division and differentiation of odorants
B. mitotic division and differentiation of basal epithelial cells
C. mitotic division of olfactory sensory neurons
D. mitotic division and differentiation of supporting cells. ANSWER - B. mitotic division
and differentiation of basal epithelial cells
When the tympanic membrane vibrates with the same frequency as the incoming sound
waves it is known as:
A. amplitude.
B. resonance.
C. cycles.
D. hertz.
E. pitch.. ANSWER - B. resonance
*the right combination of frequencies and amplitudes including the tympanic membrane
will begin to vibrate at the same frequency as the sound = RESONANCE
The taste sensation that is triggered by the amino acid glutamate is known as:
A. peppery.
B. salty.
C. sweet.
D. sour.
E. umami. ANSWER - E. umami
A person with damage to this part of the brain (indicated by the arrow) will have normal
acoustic reflexes but will have difficulty performing which of the following functions?
,A. interpreting sounds and recognizing a pattern in them
B. directing input from the thalamus to the brainstem
C. sending auditory information to the midbrain
D. directing a variety of motor reflexes to sound. ANSWER - A. interpreting sounds and
recognizing a pattern in them
Which of these is NOT a type of photoreceptor?
A. red cone
B. blue cone
C. green cone
D. yellow cone. ANSWER - D. yellow cone
The following steps occur in rods when they are excited by photons of light. What is the
proper sequence for these steps?
1. Membrane sodium channels close.
2. Increased phosphodiesterase breaks down cGMP.
3. Retinal changes from the 11-cis form to the 11-trans form.
4. The membrane hyperpolarizes and the rate of neurotransmitter release declines.
5. Opsin activates transducin.
6. Opsin activation occurs.
A. 6, 3, 5, 2, 1, 4
B. 3, 6, 5, 2, 1, 4
C. 1, 6, 5, 2, 4, 3
D. 1, 3, 4, 5, 6, 2
E. 3, 6, 5, 1, 2, 4. ANSWER - B. 3, 6, 5, 2, 1, 4
In order:
1. retinal changes from the 11-cis form to 11-trans form
2. Opsin activation occurs
3. Opsin activates transducin
4. increased phosphodiesterase breaks down cGMP
5. Membrane sodium channels close
6. The membrane hyperpolarizes and the rate of neurotransmitter release declines
Which of the following is not one of the six primary taste sensations?
A. umami
B. salty
C. sour
D. peppery
E. sweet. ANSWER - D. peppery
, The ________ convey(s) information about head position with respect to gravity.
A. cochlea
B. utricle
C. ampulla
D. saccule
E. utricle and the saccule. ANSWER - E. utricle and the saccule
Olfactory information is sent to all of the following areas EXCEPT the __________.
A. thalamus
B. limbic system
C. olfactory cortex
D. hypothalamus. ANSWER - A. thalamus
Movement of the endolymph in the semicircular canals:
A. signals linear acceleration.
B. signals rotational movements.
C. allows us to hear low tones.
D. produces a rushing sound.
E. signals body position with respect to gravity.. ANSWER - B. signals rotational
movements
A sensory receptor characterized as a free nerve ending using the neurotransmitter,
Substance P, would most likely be a:
Mechanoreceptor
Thermoreceptor
Nociceptor
Photoreceptor
chemoreceptor. ANSWER - Nociceptor
Which of the following statements about hair cells is false?
A. Hair cells within the organ of corti respond when pushed against the tectorial membrane
B. Hair cells in the Uricle and saccule are activated by rotational movements.
C. Hair cells are embedded in a gelatinous mass called the cupula within the semicircular
ducts
D. Hair cells are mechanoreceptors
E. Hair cells depolarize as mechanically-gated potassioum channels open and potassium
enters the cell.. ANSWER - B. Hair cells in the Uricle and saccule are activated by
rotational movements.
Which of the following is FALSE?
