Question 1

When light energy hits a photopigment, the molecule:

Accepted Answer

A) changes shape, setting off a series of chemical reactions. 
B) is destroyed, setting off a series of chemical reactions. 
C) is separated from the plasma membrane. 
D) forms an enzyme. 
A) changes shape, setting off a series of chemical reactions. 
B) is destroyed, setting off a series of chemical reactions. 
C) is separated from the plasma membrane. 
D) forms an enzyme.

Question 2

Odor molecules diffuse through mucus and bind directly to receptor proteins on the:

Accepted Answer

A) brain. 
B) dermis. 
C) corpuscles. 
D) dendrites. 
E) axons. 
A) brain. 
B) dermis. 
C) corpuscles. 
D) dendrites. 
E) axons.

Question 3

What is the blind spot?

Accepted Answer

A) the part of the cerebral cortex that interprets action potentials from the eye 
B) a part of the cornea 
C) an area of the retina that has no receptor cells 
D) a space in the vitreous humor 
E) the hole where there is no iris 
A) the part of the cerebral cortex that interprets action potentials from the eye 
B) a part of the cornea 
C) an area of the retina that has no receptor cells 
D) a space in the vitreous humor 
E) the hole where there is no iris

Question 4

Owls have many anatomical modifications that enable them to hunt at night. For example, some of their feathers are serrated on the edges, which eliminates the noise created by air flowing over a smooth feather surface. Owls can thus descend on their prey without a sound. They can locate small prey with remarkable accuracy, even in dim light or complete darkness. Experiments conducted in totally dark, soundproof rooms have shown that owls can capture prey after pinpointing its location to within 1.5 degrees in both horizontal and vertical planes! Based on this scenario, which of these structures do owls most rely on when they hunt in total darkness?

Accepted Answer

A) olfactory bulb 
B) mechanoreceptors 
C) photoreceptors 
D) nociceptors 
E) umami receptors 
A) olfactory bulb 
B) mechanoreceptors 
C) photoreceptors 
D) nociceptors 
E) umami receptors

Question 5

Within a taste bud, ________ cells give rise to new cells.

Accepted Answer

A) glial 
B) stem 
C) supporting 
D) taste receptor 
E) neuron 
A) glial 
B) stem 
C) supporting 
D) taste receptor 
E) neuron

Question 6

The arrangement of the semicircular canals is most similar to the:

Accepted Answer

A) utricle and saccule. 
B) axes of a two-dimensional graph. 
C) axes of a three-dimensional graph. 
D) direction of the Eustachian canal. 
A) utricle and saccule. 
B) axes of a two-dimensional graph. 
C) axes of a three-dimensional graph. 
D) direction of the Eustachian canal.

Question 7

What are the two main functions of the choroid layer, located behind the retina in humans?

Accepted Answer

to supply blood to t

Question 8

Olfactory chemoreceptors are located in the ________ cavity.

Accepted Answer

The answer of Olfactory chemoreceptors are located in the ________...

Question 9

Receptor potentials are ________ the strength of the stimulus.

Accepted Answer

A) unrelated to 
B) the same regardless of 
C) inversely proportional to 
D) directly proportional to 
E) much greater than 
A) unrelated to 
B) the same regardless of 
C) inversely proportional to 
D) directly proportional to 
E) much greater than

Question 10

The magnitude of sound vibrations, as measured in decibels, is called:

Accepted Answer

A) pitch. 
B) loudness. 
C) key. 
D) frequency. 
A) pitch. 
B) loudness. 
C) key. 
D) frequency.

Question 11

A biological molecule that responds to a stimulus is a:

Accepted Answer

A) receiver. 
B) receptor. 
C) corpuscle. 
D) sensory cell. 
E) neuron. 
A) receiver. 
B) receptor. 
C) corpuscle. 
D) sensory cell. 
E) neuron.

Question 12

How does the ear distinguish between loud and soft sounds?

Accepted Answer

The louder the sound, the more the hair

Question 13

The receptor cells for hearing are located in the:

Accepted Answer

A) cochlea. 
B) semicircular canals. 
C) pinna. 
D) utricle. 
E) Eustachian tube. 
A) cochlea. 
B) semicircular canals. 
C) pinna. 
D) utricle. 
E) Eustachian tube.

Question 14

Smell and taste are detected by:

Accepted Answer

A) chemoreceptors. 
B) photoreceptors. 
C) thermoreceptors. 
D) mechanoreceptors. 
E) pain receptors. 
A) chemoreceptors. 
B) photoreceptors. 
C) thermoreceptors. 
D) mechanoreceptors. 
E) pain receptors.

Question 15

How is the placement of the eyes of a predator different from their placement on its prey?

Accepted Answer

Both eyes of a lion are in the front of

Question 16

The tiny stones in the ear, which move in response to gravity, are made of:

Accepted Answer

A) sodium chloride. 
B) magnesium. 
C) calcium carbonate. 
D) iron oxide. 
A) sodium chloride. 
B) magnesium. 
C) calcium carbonate. 
D) iron oxide.

Question 17

The oval window is between the:

Accepted Answer

A) outer ear and the middle ear. 
B) middle ear and the inner ear. 
C) cornea and the lens. 
D) lens and the retina. 
E) tympanic membrane and the anvil. 
A) outer ear and the middle ear. 
B) middle ear and the inner ear. 
C) cornea and the lens. 
D) lens and the retina. 
E) tympanic membrane and the anvil.

Question 18

What is the effect of a short eyeball?

Accepted Answer

A) blindness 
B) an enlarged blind spot 
C) nearsightedness 
D) farsightedness 
A) blindness 
B) an enlarged blind spot 
C) nearsightedness 
D) farsightedness

Question 19

The ________ provides nourishment for the lens and cornea.

Accepted Answer

A) retina 
B) aqueous humor 
C) vitreous humor 
D) choroid 
E) optic nerve 
A) retina 
B) aqueous humor 
C) vitreous humor 
D) choroid 
E) optic nerve

Question 20

The receptor cells affected by light rays are:

Accepted Answer

A) located in the ganglion cells. 
B) located in the lens. 
C) considered to be mechanoreceptors. 
D) called photopigments. 
E) called Pacinian corpuscles. 
A) located in the ganglion cells. 
B) located in the lens. 
C) considered to be mechanoreceptors. 
D) called photopigments. 
E) called Pacinian corpuscles.

Exam 39: The Senses

When light energy hits a photopigment, the molecule:

Odor molecules diffuse through mucus and bind directly to receptor proteins on the:

What is the blind spot?

Within a taste bud, ________ cells give rise to new cells.

The arrangement of the semicircular canals is most similar to the:

What are the two main functions of the choroid layer, located behind the retina in humans?

Olfactory chemoreceptors are located in the ________ cavity.

Receptor potentials are ________ the strength of the stimulus.

The magnitude of sound vibrations, as measured in decibels, is called:

A biological molecule that responds to a stimulus is a:

How does the ear distinguish between loud and soft sounds?

The receptor cells for hearing are located in the:

Smell and taste are detected by:

How is the placement of the eyes of a predator different from their placement on its prey?

The tiny stones in the ear, which move in response to gravity, are made of:

The oval window is between the:

What is the effect of a short eyeball?

The ________ provides nourishment for the lens and cornea.

The receptor cells affected by light rays are:

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

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