EXAM 4 PRACTICE BIOL 223A FREQUENTLY TESTED
ACTUAL QUESTIONS WITH CORRECT ANSWERS
Question 1.
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
Question 2.
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
Question 3.
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
,Question 4.
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
Question 5.
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
, Question 6.
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
Question 7.
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
ACTUAL QUESTIONS WITH CORRECT ANSWERS
Question 1.
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
Question 2.
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
Question 3.
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
,Question 4.
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
Question 5.
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
, Question 6.
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
Question 7.
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
