Question 1

The threshold human skin temperature at which cool or cold is perceived as pain is:

Accepted Answer

A) 32˚F. 
B) 0˚F. 
C) -5˚F. 
D) 59˚F. 
A) 32˚F. 
B) 0˚F. 
C) -5˚F. 
D) 59˚F. D

Question 2

Any cell that generates an electrical signal in response to a stimulus is a sensory ________.

Accepted Answer

receptor

Question 3

What is the blind spot, and why does it occur?

Accepted Answer

The site in the eye where the axons of the ganglion cells pass through the retina is the blind spot. There are no receptors in that area.

Question 4

The malleus is also called the:

Accepted Answer

A) pinna. 
B) hammer. 
C) stirrup. 
D) anvil. 
E) cochlea. 
A) pinna. 
B) hammer. 
C) stirrup. 
D) anvil. 
E) cochlea.

Question 5

Olfactory dysfunction, or dysosmia, is a problem with the sense of smell. Technically, it is a deviation from the normal sensing and perception of odor molecules, or olfactory stimuli processing. There are several different forms of dysosmia, including anosmia (stimuli do not activate the olfactory bulb), parosmia (some odors are interpreted as other odors), and phantosmia (hallucinations of smells that are not there). Based on this information, what specific condition is indicated in a person who mistakenly perceives the smell of peppermint as the same as the smell of something that is rotten, foul, and decomposed?

Accepted Answer

A) anosmia 
B) parosmia 
C) phantosmia 
D) dysosmia 
A) anosmia 
B) parosmia 
C) phantosmia 
D) dysosmia

Question 6

Why are we able to perceive the pitch of a sound?

Accepted Answer

A) The hammer, anvil, and stirrup vibrate at different speeds. 
B) Different parts of the basilar membrane vibrate in response to different frequencies of sound. 
C) Different parts of the tectorial membrane vibrate at different sound frequencies. 
D) The basilar membrane is stiff and narrow at the end away from the oval window. 
E) The tympanum vibrates more strongly at high pitches. 
A) The hammer, anvil, and stirrup vibrate at different speeds. 
B) Different parts of the basilar membrane vibrate in response to different frequencies of sound. 
C) Different parts of the tectorial membrane vibrate at different sound frequencies. 
D) The basilar membrane is stiff and narrow at the end away from the oval window. 
E) The tympanum vibrates more strongly at high pitches.

Question 7

Hair cells connected to nerve endings account for the sensation of a light touch against the skin. True or False?

Accepted Answer

A) True 
 B)False

Question 8

Odor molecules stimulate responses in:

Accepted Answer

A) olfactory receptors. 
B) hair cells. 
C) Pacinian corpuscles. 
D) Meissner's corpuscles. 
E) Ruffini corpuscles. 
A) olfactory receptors. 
B) hair cells. 
C) Pacinian corpuscles. 
D) Meissner's corpuscles. 
E) Ruffini corpuscles.

Question 9

Receptor potentials can trigger action potentials. True or False?

Accepted Answer

A) True 
 B)False

Question 10

If the doctor says you have a middle ear infection, which of the following could be involved?

Accepted Answer

A) pinna 
B) auditory canal 
C) vestibular system 
D) anvil 
E) cochlea 
A) pinna 
B) auditory canal 
C) vestibular system 
D) anvil 
E) cochlea

Question 11

In a person who is nearsighted, the:

Accepted Answer

A) eyeball is too short from front to back. 
B) incoming light is focused in front of the retina. 
C) lens is not functional at all. 
D) aqueous humor is cloudier than normal. 
E) muscle that controls the thickness of the lens is weak. 
A) eyeball is too short from front to back. 
B) incoming light is focused in front of the retina. 
C) lens is not functional at all. 
D) aqueous humor is cloudier than normal. 
E) muscle that controls the thickness of the lens is weak.

Question 12

The stronger the stimulus, the larger the action potential. True or False?

Accepted Answer

A) True 
 B)False

Question 13

Ommatidia are found in ________ eyes.

Accepted Answer

A) flatworm 
B) mollusk 
C) arthropod 
D) amphibian 
E) human 
A) flatworm 
B) mollusk 
C) arthropod 
D) amphibian 
E) human

Question 14

A stimulus that is strong enough to trigger an action potential is said to be above a:

Accepted Answer

A) threshold. 
B) maximum. 
C) capacity. 
D) response. 
E) nervous signal. 
A) threshold. 
B) maximum. 
C) capacity. 
D) response. 
E) nervous signal.

Question 15

The fovea of the human eye is:

Accepted Answer

A) made of mostly rods. 
B) the part of the retina that produces the sharpest image. 
C) located in the sclera. 
D) located in the cornea. 
E) where a normal lens cannot focus. 
A) made of mostly rods. 
B) the part of the retina that produces the sharpest image. 
C) located in the sclera. 
D) located in the cornea. 
E) where a normal lens cannot focus.

Question 16

A receptor that produces a signal in response to stretching is most likely a:

Accepted Answer

A) pain receptor. 
B) mechanoreceptor. 
C) chemoreceptor. 
D) photoreceptor. 
A) pain receptor. 
B) mechanoreceptor. 
C) chemoreceptor. 
D) photoreceptor.

Question 17

Chemoreceptors include:

Accepted Answer

A) rods. 
B) hair cells. 
C) Pacinian corpuscles. 
D) olfactory receptors. 
E) muscle spindles. 
A) rods. 
B) hair cells. 
C) Pacinian corpuscles. 
D) olfactory receptors. 
E) muscle spindles.

Question 18

The white of the human eye's exterior is actually the:

Accepted Answer

A) iris. 
B) pupil. 
C) sclera. 
D) fovea. 
E) retina. 
A) iris. 
B) pupil. 
C) sclera. 
D) fovea. 
E) retina.

Question 19

Photoreceptors include:

Accepted Answer

A) rods. 
B) hair cells. 
C) Pacinian corpuscles. 
D) Meissner's corpuscles. 
E) Ruffini corpuscles. 
A) rods. 
B) hair cells. 
C) Pacinian corpuscles. 
D) Meissner's corpuscles. 
E) Ruffini corpuscles.

Question 20

Which of the following is one way that ions are related to pain?

Accepted Answer

A) Potassium ions are released by bradykinin, which activates pain receptors. 
B) Magnesium ions bind to potassium ions, creating bradykinin, which activates pain receptors. 
C) Potassium ions directly activate nociceptors. 
D) Potassium ions, when combined with bradykinin, cause cell damage. The cell then signals the brain to perceive pain. 
A) Potassium ions are released by bradykinin, which activates pain receptors. 
B) Magnesium ions bind to potassium ions, creating bradykinin, which activates pain receptors. 
C) Potassium ions directly activate nociceptors. 
D) Potassium ions, when combined with bradykinin, cause cell damage. The cell then signals the brain to perceive pain.

Exam 39: The Senses

The threshold human skin temperature at which cool or cold is perceived as pain is:

Any cell that generates an electrical signal in response to a stimulus is a sensory ________.

What is the blind spot, and why does it occur?

The malleus is also called the:

Why are we able to perceive the pitch of a sound?

Hair cells connected to nerve endings account for the sensation of a light touch against the skin. True or False?

Odor molecules stimulate responses in:

Receptor potentials can trigger action potentials. True or False?

If the doctor says you have a middle ear infection, which of the following could be involved?

In a person who is nearsighted, the:

The stronger the stimulus, the larger the action potential. True or False?

Ommatidia are found in ________ eyes.

A stimulus that is strong enough to trigger an action potential is said to be above a:

The fovea of the human eye is:

A receptor that produces a signal in response to stretching is most likely a:

Chemoreceptors include:

The white of the human eye's exterior is actually the:

Photoreceptors include:

Which of the following is one way that ions are related to pain?

An Introduction to Life on Earth

Atoms, Molecules, and Life

Biological Molecules

Cell Structure and Function

Cell Membrane Structure and Function

Energy Flow in the Life of a Cell

Capturing Solar Energy: Photosynthesis

Harvesting Energy: Glycolysis and Cellular Respiration

The Continuity of Life: Cellular Reproduction

Patterns of Inheritance

Dna: the Molecule of Heredity

Gene Expression and Regulation

Biotechnology

Principles of Evolution

How Populations Evolve

The Origin of Species

The History of Life

Systematics: Seeking Order Amidst Diversity

The Diversity of Prokaryotes and Viruses

The Diversity of Protists

The Diversity of Plants

The Diversity of Fungi

Animal Diversity I: Invertebrates

Animal Diversity Ii: Vertebrates

Animal Behavior

Population Growth and Regulation

Community Interactions

How Do Ecosystems Work

Earths Diverse Ecosystems

Conserving Earths Biodiversity

Homeostasis and the Organization of the Animal Body

Circulation

Respiration

Nutrition and Digestion

The Urinary System

Defenses Against Disease

Chemical Control of the Animal Body: the Endocrine System

The Nervous System

Action and Support: the Muscles and Skeleton

Animal Reproduction

Animal Development

Plant Anatomy and Nutrient Transport

Plant Reproduction and Development

Plant Responses to the Environment

Filters