Question 1

Hair cells in the ear that give auditory information are concentrated in the

Accepted Answer

A)  oval window. 
B)  tympanic membrane. 
C)  organ of Corti. 
D)  semicircular canals. 
E)  vestibular apparatus. 
A)  oval window. 
B)  tympanic membrane. 
C)  organ of Corti. 
D)  semicircular canals. 
E)  vestibular apparatus.

Question 2

Hair cells are associated with all of the following sensory systems except the

Accepted Answer

A)  Golgi tendon organ. 
B)  lateral line. 
C)  cochlea. 
D)  vestibular apparatus. 
E)  semicircular canals. 
A)  Golgi tendon organ. 
B)  lateral line. 
C)  cochlea. 
D)  vestibular apparatus. 
E)  semicircular canals.

Question 3

The magnitude of a receptor potential

Accepted Answer

A)  depends on the strength of the incoming action potential. 
B)  remains high even after a long period of stimulation. 
C)  is the same no matter what the type of stimulus. 
D)  depends on the amount of neurotransmitter released. 
E)  affects the frequency of resulting action potentials. 
A)  depends on the strength of the incoming action potential. 
B)  remains high even after a long period of stimulation. 
C)  is the same no matter what the type of stimulus. 
D)  depends on the amount of neurotransmitter released. 
E)  affects the frequency of resulting action potentials.

Question 4

The inner ear is a long, coiled structure called the _______.

Accepted Answer

The answer of The inner ear is a long, coiled...

Question 5

If a flatworm is positioned relative to a stationary light source such that more light-sensitive cells are stimulated in its right than in its left eye cup, the planarian will

Accepted Answer

A)  turn to the left. 
B)  turn to the right. 
C)  make a complete clockwise circle. 
D)  make a complete counterclockwise circle. 
E)  stop moving. 
A)  turn to the left. 
B)  turn to the right. 
C)  make a complete clockwise circle. 
D)  make a complete counterclockwise circle. 
E)  stop moving.

Question 6

In humans, the region of the retina where the central part of the visual field falls is the

Accepted Answer

A)  central ganglion cell. 
B)  fovea. 
C)  optic nerve. 
D)  cornea. 
E)  pupil. 
A)  central ganglion cell. 
B)  fovea. 
C)  optic nerve. 
D)  cornea. 
E)  pupil.

Question 7

Which statement about sensory systems is not true?

Accepted Answer

A)  Sensory transduction involves the conversion (direct or indirect) of a physical or chemical stimulus into changes in membrane potentials. 
B)  In general, a stimulus causes a change in the flow of ions across the plasma membrane of a sensory receptor cell. 
C)  The term "adaptation" refers to the process by which a sensory system becomes insensitive to a continuing source of stimulation. 
D)  The more intense a stimulus, the greater the magnitude of each action potential fired by a sensory neuron. 
E)  Sensory adaptation plays a role in the ability of organisms to discriminate between important and unimportant information. 
A)  Sensory transduction involves the conversion (direct or indirect) of a physical or chemical stimulus into changes in membrane potentials. 
B)  In general, a stimulus causes a change in the flow of ions across the plasma membrane of a sensory receptor cell. 
C)  The term "adaptation" refers to the process by which a sensory system becomes insensitive to a continuing source of stimulation. 
D)  The more intense a stimulus, the greater the magnitude of each action potential fired by a sensory neuron. 
E)  Sensory adaptation plays a role in the ability of organisms to discriminate between important and unimportant information.

Question 8

Which of the following statements about the vertebrate retina is false?

Accepted Answer

A)  There are more rods than cones in the retinas of humans. 
B)  There is a higher proportion of cones than rods in the foveas of humans. 
C)  Cones give us our highest visual acuity. 
D)  Our peripheral vision involves more rod cells than cone cells. 
E)  Some entirely nocturnal animals have only cones in their retinas. 
A)  There are more rods than cones in the retinas of humans. 
B)  There is a higher proportion of cones than rods in the foveas of humans. 
C)  Cones give us our highest visual acuity. 
D)  Our peripheral vision involves more rod cells than cone cells. 
E)  Some entirely nocturnal animals have only cones in their retinas.

Question 9

Sensory cells transduce physical or chemical stimuli

Accepted Answer

A)  from one form to another. 
B)  into a change of membrane potential. 
C)  from an action potential into a synaptic signal. 
D)  by summing incoming action potentials. 
E)  into different forms to be sent to the brain. 
A)  from one form to another. 
B)  into a change of membrane potential. 
C)  from an action potential into a synaptic signal. 
D)  by summing incoming action potentials. 
E)  into different forms to be sent to the brain.

Question 10

The chemosensory hairs with which male moths detect a female's pheromones are located

Accepted Answer

A)  near the mouthparts. 
B)  at the base of the wings. 
C)  on the tip of the proboscis. 
D)  on the antennae. 
E)  on the feet. 
A)  near the mouthparts. 
B)  at the base of the wings. 
C)  on the tip of the proboscis. 
D)  on the antennae. 
E)  on the feet.

Question 11

Approximately how many genes code for olfactory receptor proteins in mice?

Accepted Answer

A)  14 
B)  120 
C)  1,000 
D)  10,000 
E)  An unknown number; this question has never been studied. 
A)  14 
B)  120 
C)  1,000 
D)  10,000 
E)  An unknown number; this question has never been studied.

Question 12

Stretch receptors in the aorta and carotid artery sense changes in arterial pressure. These receptors are therefore considered

Accepted Answer

A)  chemoreceptors. 
B)  thermoreceptors. 
C)  electroreceptors. 
D)  mechanoreceptors. 
E)  muscle spindles. 
A)  chemoreceptors. 
B)  thermoreceptors. 
C)  electroreceptors. 
D)  mechanoreceptors. 
E)  muscle spindles.

Question 13

Fish can detect pressure waves in water through their _______ sensory system.

Accepted Answer

The answer of Fish can detect pressure waves in water...

Question 14

Many animals can focus sounds by moving their ear _______ toward the sound.

Accepted Answer

The answer of Many animals can focus sounds by moving...

Question 15

You had a cold for a number of weeks, during which time your sense of smell was diminished. What was the cause of your loss of smell?

Accepted Answer

Your sense of smell depends on olfactory

Question 16

The _______ in mammals is located on the septum dividing the two nostrils and functions in detecting pheromones.

Accepted Answer

The answer of The _______ in mammals is located on...

Question 17

Which anatomical adaptation allows bats to hear the echoes of their high-pitched sound pulses?

Accepted Answer

A)  A pit organ in front of their eyes 
B)  Fatty deposits surrounding their jaw 
C)  Small muscles that adjust their hearing sensitivity 
D)  Membranes of their wings that vibrate in response to the echoes 
E)  None of the above 
A)  A pit organ in front of their eyes 
B)  Fatty deposits surrounding their jaw 
C)  Small muscles that adjust their hearing sensitivity 
D)  Membranes of their wings that vibrate in response to the echoes 
E)  None of the above

Question 18

You don't normally focus on the feeling of your clothes against your skin, because

Accepted Answer

A)  touch receptors display adaptation. 
B)  your brain can't process multiple stimuli at once. 
C)  you have inhibitory chemoreceptors on your skin. 
D)  vomeronasal organs prevent diffuse feeling. 
E)  rhodopsin molecules display adaptation. 
A)  touch receptors display adaptation. 
B)  your brain can't process multiple stimuli at once. 
C)  you have inhibitory chemoreceptors on your skin. 
D)  vomeronasal organs prevent diffuse feeling. 
E)  rhodopsin molecules display adaptation.

Question 19

Which of the following statements about rhodopsin is false?

Accepted Answer

A)  Rhodopsin consists of a protein and a light-absorbing molecule. 
B)  When 11-cis-retinal absorbs light, it becomes all-trans-retinal. 
C)  In vertebrate eyes, the retinal and the opsin never separate from each other. 
D)  Rhodopsin is a transmembrane protein. 
E)  All animals that can sense light do so using rhodopsin. 
A)  Rhodopsin consists of a protein and a light-absorbing molecule. 
B)  When 11-cis-retinal absorbs light, it becomes all-trans-retinal. 
C)  In vertebrate eyes, the retinal and the opsin never separate from each other. 
D)  Rhodopsin is a transmembrane protein. 
E)  All animals that can sense light do so using rhodopsin.

Question 20

The organ of Corti is found within the inner ear and

Accepted Answer

A)  sits atop of the basilar membrane. 
B)  transduces pressure waves into action potentials. 
C)  contains hair cells with stereocilia. 
D)  All of the above 
E)  None of the above 
A)  sits atop of the basilar membrane. 
B)  transduces pressure waves into action potentials. 
C)  contains hair cells with stereocilia. 
D)  All of the above 
E)  None of the above

Exam 46: Sensory Systems

Hair cells in the ear that give auditory information are concentrated in the

Hair cells are associated with all of the following sensory systems except the

The magnitude of a receptor potential

The inner ear is a long, coiled structure called the _______.

If a flatworm is positioned relative to a stationary light source such that more light-sensitive cells are stimulated in its right than in its left eye cup, the planarian will

In humans, the region of the retina where the central part of the visual field falls is the

Which statement about sensory systems is not true?

Which of the following statements about the vertebrate retina is false?

Sensory cells transduce physical or chemical stimuli

The chemosensory hairs with which male moths detect a female's pheromones are located

Approximately how many genes code for olfactory receptor proteins in mice?

Stretch receptors in the aorta and carotid artery sense changes in arterial pressure. These receptors are therefore considered

Fish can detect pressure waves in water through their _______ sensory system.

Many animals can focus sounds by moving their ear _______ toward the sound.

You had a cold for a number of weeks, during which time your sense of smell was diminished. What was the cause of your loss of smell?

The _______ in mammals is located on the septum dividing the two nostrils and functions in detecting pheromones.

Which anatomical adaptation allows bats to hear the echoes of their high-pitched sound pulses?

You don't normally focus on the feeling of your clothes against your skin, because

Which of the following statements about rhodopsin is false?

The organ of Corti is found within the inner ear and

Studying Life

Small Molecules and the Chemistry of Life

Proteins, Carbohydrates, and Lipids

Nucleic Acids and the Origin of Life

Cells: the Working Units of Life

Cell Membranes

Cell Signaling and Communication

Energy, Enzymes, and Metabolism

Pathways That Harvest Chemical Energy

Photosynthesis: Energy From Sunlight

The Cell Cycle and Cell Division

Inheritance, Genes, and Chromosomes

Dna and Its Role in Heredity

From Dna to Protein: Gene Expression

Gene Mutation and Molecular Medicine

Regulation of Gene Expression

Genomes

Recombinent Dna and Biotechnology

Differential Gene Expression in Development

Development and Evolutionary Change

Evidence and Mechanisms of Evolution

Reconstructing and Using Phylogenies

Species and Their Formation

Evolution of Genes and Genomes

The History of Life on Earth

Bacteria and Archaea: the Prokaryotic Domains

The Origin and Diversification of Eukaryotes

Plants Without Seeds: From Water to Land

The Evolution of Seed Plants

Fungi: Recyclers, Pathogens, Parasites, and Plant Partners

Animal Origins and the Evolution of Body Plans

Protostome Animals

Deuterostome Animals

The Plant Body

Transport in Plants

Plant Nutrition

Regulation of Plant Growth

Reproduction in Flowering Plants

Plant Responses to Environmental Challenges

Physiology, Homeostasis, and Temperature Regulation

Animal Hormones

Immunology: Animal Defense Systems

Animal Reproduction

Animal Development

Neurons and Nervous Systems

The Mammalian Nervous System: Structure and Higher Function

Musculoskeletal Systems

Gas Exchange in Animals

Circulatory Systems

Nutrition, Digestion, and Absorption

Salt and Water Balance and Nitrogen

Animal Behavior

Ecology and the Distribution of Life

Population Ecology

Species Interaction and Coevolution

Community Ecology

Ecosystems and Global Ecology

Conservation Biology

Filters