Question 1

The blind spot in the eye is caused by

Accepted Answer

A)  an unusually high density of rod cells. 
B)  an unusually high density of cone cells. 
C)  the focal spot of incoming light. 
D)  a lack of photoreceptors where the optic nerve leaves the eye. 
E)  saturated photoreceptors. 
A)  an unusually high density of rod cells. 
B)  an unusually high density of cone cells. 
C)  the focal spot of incoming light. 
D)  a lack of photoreceptors where the optic nerve leaves the eye. 
E)  saturated photoreceptors.

Question 2

The lateral line system

Accepted Answer

A)  provides information about a fish's movements. 
B)  is found in only in striped fish. 
C)  provides information about the depth a fish is swimming. 
D)  has mechanoreceptors that detect water flow. 
E)  Both a and d 
A)  provides information about a fish's movements. 
B)  is found in only in striped fish. 
C)  provides information about the depth a fish is swimming. 
D)  has mechanoreceptors that detect water flow. 
E)  Both a and d

Question 3

The Golgi tendon organ

Accepted Answer

A)  causes muscles to relax and protects against tearing. 
B)  senses light touch. 
C)  increases muscle contraction. 
D)  is found in high densities on lips and fingertips. 
E)  provides steady-state information about pressure. 
A)  causes muscles to relax and protects against tearing. 
B)  senses light touch. 
C)  increases muscle contraction. 
D)  is found in high densities on lips and fingertips. 
E)  provides steady-state information about pressure.

Question 4

Which of the following statements about information flow in the vertebrate visual system is true?

Accepted Answer

A)  Action potentials in bipolar cells cause the release of neurotransmitter onto ganglion cells. 
B)  Amacrine cells integrate the activity of neighboring rod and cone cells. 
C)  When photons of light enter they eye, the first cells in the retina they encounter are ganglion cells. 
D)  The highest density of rod cells in the human retina is centrally located in the fovea, resulting in high acuity dim light vision. 
E)  Pigmented epithelial cells at the back of the retina provide information about the level of ambient light for contrast adjustments. 
A)  Action potentials in bipolar cells cause the release of neurotransmitter onto ganglion cells. 
B)  Amacrine cells integrate the activity of neighboring rod and cone cells. 
C)  When photons of light enter they eye, the first cells in the retina they encounter are ganglion cells. 
D)  The highest density of rod cells in the human retina is centrally located in the fovea, resulting in high acuity dim light vision. 
E)  Pigmented epithelial cells at the back of the retina provide information about the level of ambient light for contrast adjustments.

Question 5

The warmth of the sun on one's face triggers

Accepted Answer

A)  an ionotropic sensory receptor. 
B)  the opening of a cation channel. 
C)  a metabotropic sensory receptor. 
D)  a second messenger system. 
E)  Both a and b 
A)  an ionotropic sensory receptor. 
B)  the opening of a cation channel. 
C)  a metabotropic sensory receptor. 
D)  a second messenger system. 
E)  Both a and b

Question 6

Which of the following are not metabotropic sensory receptors?

Accepted Answer

A)  Chemoreceptors 
B)  Photoreceptors 
C)  Thermoreceptors 
D)  All of the above are metabotropic sensory receptors. 
E)  None of the above are metabotropic sensory receptors. 
A)  Chemoreceptors 
B)  Photoreceptors 
C)  Thermoreceptors 
D)  All of the above are metabotropic sensory receptors. 
E)  None of the above are metabotropic sensory receptors.

Question 7

Which of the following statements about the detection of chemical stimuli is false?

Accepted Answer

A)  Snakes use their tongues to smell. 
B)  Many mammals have a vomeronasal organ to detect pheromones. 
C)  A greater frequency of action potentials is associated with perception of a more intense smell. 
D)  Taste buds are confined to the oral cavity in aquatic animals. 
E)  Chemoreceptors monitor aspects of the internal environment. 
A)  Snakes use their tongues to smell. 
B)  Many mammals have a vomeronasal organ to detect pheromones. 
C)  A greater frequency of action potentials is associated with perception of a more intense smell. 
D)  Taste buds are confined to the oral cavity in aquatic animals. 
E)  Chemoreceptors monitor aspects of the internal environment.

Question 8

Which of the following statements about the lateral line system is true?

Accepted Answer

A)  The cupulae of the lateral line system each contain several hair cells. 
B)  The lateral line system allows the fish to sense the presence of other fish. 
C)  The lateral line system responds to pressure waves in the surrounding water. 
D)  The canal of the lateral line system has numerous openings to the external environment. 
E)  All of the above 
A)  The cupulae of the lateral line system each contain several hair cells. 
B)  The lateral line system allows the fish to sense the presence of other fish. 
C)  The lateral line system responds to pressure waves in the surrounding water. 
D)  The canal of the lateral line system has numerous openings to the external environment. 
E)  All of the above

Question 9

Which of the following structures of the mammalian auditory system is responsible for transmitting signals between flexible membranes?

Accepted Answer

A)  Organ of Corti 
B)  Ear ossicles 
C)  Oval window 
D)  Cochlea 
E)  Round window 
A)  Organ of Corti 
B)  Ear ossicles 
C)  Oval window 
D)  Cochlea 
E)  Round window

Question 10

The greatest intensity of perceived smell comes from the

Accepted Answer

A)  enzyme that binds with the most odorant molecules. 
B)  odorant that binds to the most receptors. 
C)  greatest variety of odorant molecules. 
D)  greatest threshold of depolarization. 
E)  greatest number of odorant molecules entering the cell. 
A)  enzyme that binds with the most odorant molecules. 
B)  odorant that binds to the most receptors. 
C)  greatest variety of odorant molecules. 
D)  greatest threshold of depolarization. 
E)  greatest number of odorant molecules entering the cell.

Question 11

After a loud rock concert your hearing appears to be dampened. What portion of your ear been altered during the concert, resulting in a dampening of your hearing?

Accepted Answer

Sounds that are too loud will

Question 12

Sensory transduction involves

Accepted Answer

A)  changes in membrane potential. 
B)  converting mechanical stimuli into emotional responses. 
C)  magnetic frequency stimulation. 
D)  Both a and c 
E)  All of the above 
A)  changes in membrane potential. 
B)  converting mechanical stimuli into emotional responses. 
C)  magnetic frequency stimulation. 
D)  Both a and c 
E)  All of the above

Question 13

Which of the following events is triggered by the binding of an odorant molecule to a receptor protein?

Accepted Answer

A)  Opening of sodium channels 
B)  Increase of second messenger in cytoplasm of sensory cell 
C)  Activation of G protein 
D)  Depolarization of sensory cell 
E)  All of the above 
A)  Opening of sodium channels 
B)  Increase of second messenger in cytoplasm of sensory cell 
C)  Activation of G protein 
D)  Depolarization of sensory cell 
E)  All of the above

Question 14

Adaptation is best described as

Accepted Answer

A)  a gradually diminished response to maintained or repeated stimulation. 
B)  part of natural selection. 
C)  allowing animals to find a niche habitat. 
D)  a gradually increased response to maintained or repeated stimulation. 
E)  All of the above 
A)  a gradually diminished response to maintained or repeated stimulation. 
B)  part of natural selection. 
C)  allowing animals to find a niche habitat. 
D)  a gradually increased response to maintained or repeated stimulation. 
E)  All of the above

Question 15

The phenomenon of emitting sounds and creating images from reflections of those sounds is called _______.

Accepted Answer

The answer of The phenomenon of emitting sounds and creating...

Question 16

The structure that allows snakes to detect infrared wavelengths is called the _______.

Accepted Answer

The answer of The structure that allows snakes to detect...

Question 17

If you brush against a doorway as you enter a room, you will trigger

Accepted Answer

A)  an ionotropic sensory receptor. 
B)  the opening of a pressure-sensitive cation channel. 
C)  a metabotropic sensory receptor. 
D)  a second messenger system. 
E)  Both a and b 
A)  an ionotropic sensory receptor. 
B)  the opening of a pressure-sensitive cation channel. 
C)  a metabotropic sensory receptor. 
D)  a second messenger system. 
E)  Both a and b

Question 18

Which of the following statements about vertebrate vision is false?

Accepted Answer

A)  Visual acuity varies according to the density of photoreceptors in the retina. 
B)  Some vertebrates have two foveas per eye. 
C)  A blind spot is always located where the optic nerve leaves the eye. 
D)  Unlike a camera, the vertebrate eye does not project inverted images on the retina. 
E)  Two major types of photoreceptor cells are found in the retina. 
A)  Visual acuity varies according to the density of photoreceptors in the retina. 
B)  Some vertebrates have two foveas per eye. 
C)  A blind spot is always located where the optic nerve leaves the eye. 
D)  Unlike a camera, the vertebrate eye does not project inverted images on the retina. 
E)  Two major types of photoreceptor cells are found in the retina.

Question 19

Receptor potentials produce action potentials in two ways: by generating action potentials within the sensory cells, or by causing the release of _______, which induces an associated neuron to generate action potentials.

Accepted Answer

A)  a hormone 
B)  ATP 
C)  interleukin 
D)  a neurotransmitter 
E)  glucagon 
A)  a hormone 
B)  ATP 
C)  interleukin 
D)  a neurotransmitter 
E)  glucagon

Question 20

What percentage of the mouse genome codes for olfactory receptor proteins?

Accepted Answer

A)  0.02% 
B)  1% 
C)  0.3% 
D)  3% 
E)  14% 
A)  0.02% 
B)  1% 
C)  0.3% 
D)  3% 
E)  14%

Exam 46: Sensory Systems

The blind spot in the eye is caused by

The lateral line system

The Golgi tendon organ

Which of the following statements about information flow in the vertebrate visual system is true?

The warmth of the sun on one's face triggers

Which of the following are not metabotropic sensory receptors?

Which of the following statements about the detection of chemical stimuli is false?

Which of the following statements about the lateral line system is true?

Which of the following structures of the mammalian auditory system is responsible for transmitting signals between flexible membranes?

The greatest intensity of perceived smell comes from the

After a loud rock concert your hearing appears to be dampened. What portion of your ear been altered during the concert, resulting in a dampening of your hearing?

Sensory transduction involves

Which of the following events is triggered by the binding of an odorant molecule to a receptor protein?

Adaptation is best described as

The phenomenon of emitting sounds and creating images from reflections of those sounds is called _______.

The structure that allows snakes to detect infrared wavelengths is called the _______.

If you brush against a doorway as you enter a room, you will trigger

Which of the following statements about vertebrate vision is false?

Receptor potentials produce action potentials in two ways: by generating action potentials within the sensory cells, or by causing the release of _______, which induces an associated neuron to generate action potentials.

What percentage of the mouse genome codes for olfactory receptor proteins?

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