Question 1

The major function of a receptor is to

Accepted Answer

A)  control the autonomic functions of the body. 
B)  stabilize the internal environment to achieve homeostasis. 
C)  produce responses to the various stimuli the body receives. 
D)  give organisms awareness and sensitivity to their environment by converting a stimulus to an action potential (nerve impulse). 
E)  interpret the sensations it receives from the environment. 
A)  control the autonomic functions of the body. 
B)  stabilize the internal environment to achieve homeostasis. 
C)  produce responses to the various stimuli the body receives. 
D)  give organisms awareness and sensitivity to their environment by converting a stimulus to an action potential (nerve impulse). 
E)  interpret the sensations it receives from the environment.

Question 2

From an evolutionary standpoint, why is it important to have more bitter-sensing taste buds than any other type?

Accepted Answer

A)  there are more bitter-tasting foods than any other in nature 
B)  more people prefer bitter-tasting foods 
C)  many poisons have a bitter taste so only tiny amounts are needed to allow sensing to take place 
D)  bitter taste is associated with mating selection 
E)  to prevent over-consumption of sugary foods 
A)  there are more bitter-tasting foods than any other in nature 
B)  more people prefer bitter-tasting foods 
C)  many poisons have a bitter taste so only tiny amounts are needed to allow sensing to take place 
D)  bitter taste is associated with mating selection 
E)  to prevent over-consumption of sugary foods

Question 3

The "blind spot" is the point in the eye where the

Accepted Answer

A)  lens is attached by ligaments. 
B)  choroid attaches to the retina. 
C)  cornea attaches to the sclera. 
D)  optic nerve exits the eye. 
E)  iris attaches to the sclera. 
A)  lens is attached by ligaments. 
B)  choroid attaches to the retina. 
C)  cornea attaches to the sclera. 
D)  optic nerve exits the eye. 
E)  iris attaches to the sclera.

Question 4

The loudness of sound is measured in

Accepted Answer

A)  millihertz. 
B)  decibels. 
C)  megahertz. 
D)  watts. 
E)  gigahertz. 
A)  millihertz. 
B)  decibels. 
C)  megahertz. 
D)  watts. 
E)  gigahertz.

Question 5

The jellylike substance that fills the chamber behind the lens is

Accepted Answer

A)  the vitreous humor. 
B)  the aqueous humor. 
C)  blood. 
D)  a solution rich in glucose. 
E)  the enzymes for proper function. 
A)  the vitreous humor. 
B)  the aqueous humor. 
C)  blood. 
D)  a solution rich in glucose. 
E)  the enzymes for proper function.

Question 6

Olfactory centers are responsive to

Accepted Answer

A)  touch. 
B)  smell. 
C)  taste. 
D)  sound. 
E)  sight. 
A)  touch. 
B)  smell. 
C)  taste. 
D)  sound. 
E)  sight.

Question 7

Selecting the Exception Four of the five answers listed below are functionally connected to each other. Select the exception.

Accepted Answer

A)  hammer 
B)  pinna 
C)  stirrup 
D)  anvil 
E)  tympanic membrane 
A)  hammer 
B)  pinna 
C)  stirrup 
D)  anvil 
E)  tympanic membrane

Question 8

Interpretation of smell is accomplished

Accepted Answer

A)  by the nasal epithelium. 
B)  in the olfactory receptors. 
C)  by centers in the brainstem. 
D)  by the cerebral cortex. 
E)  independently of olfactory receptors. 
A)  by the nasal epithelium. 
B)  in the olfactory receptors. 
C)  by centers in the brainstem. 
D)  by the cerebral cortex. 
E)  independently of olfactory receptors.

Question 9

The carotid bodies detect carbon dioxide in the blood and is, therefore, a

Accepted Answer

A)  chemoreceptor. 
B)  photoreceptor. 
C)  thermoreceptor. 
D)  mechanoreceptor. 
E)  movement receiver. 
A)  chemoreceptor. 
B)  photoreceptor. 
C)  thermoreceptor. 
D)  mechanoreceptor. 
E)  movement receiver.

Question 10

When light hits the retina, the image is

Accepted Answer

A)  exactly as it enters the eye. 
B)  upside down. 
C)  reversed left to right. 
D)  upside down and normal from left to right. 
E)  upside down and reversed left to right. 
A)  exactly as it enters the eye. 
B)  upside down. 
C)  reversed left to right. 
D)  upside down and normal from left to right. 
E)  upside down and reversed left to right.

Question 11

Visual pigments are molecules made of

Accepted Answer

A)  protein only. 
B)  carbohydrate only. 
C)  vitamin derivative only. 
D)  steroid only. 
E)  protein and a vitamin derivative. 
A)  protein only. 
B)  carbohydrate only. 
C)  vitamin derivative only. 
D)  steroid only. 
E)  protein and a vitamin derivative.

Question 12

Some MP3 players or iPods produce sounds over

Accepted Answer

A)  100 decibels. 
B)  130 decibels. 
C)  200 decibels. 
D)  250 decibels. 
E)  300 decibels. 
A)  100 decibels. 
B)  130 decibels. 
C)  200 decibels. 
D)  250 decibels. 
E)  300 decibels.

Question 13

The vomeronasal organ is used to detect

Accepted Answer

A)  foods. 
B)  dangerous chemicals. 
C)  volatile liquids. 
D)  pheromones. 
E)  aftershave lotion. 
A)  foods. 
B)  dangerous chemicals. 
C)  volatile liquids. 
D)  pheromones. 
E)  aftershave lotion.

Question 14

Rods and cones are located in the

Accepted Answer

A)  lens. 
B)  cornea. 
C)  pupil. 
D)  iris. 
E)  retina. 
A)  lens. 
B)  cornea. 
C)  pupil. 
D)  iris. 
E)  retina.

Question 15

Free nerve endings detect all of the following EXCEPT

Accepted Answer

A)  touch. 
B)  pressure. 
C)  heat. 
D)  pain. 
E)  light. 
A)  touch. 
B)  pressure. 
C)  heat. 
D)  pain. 
E)  light.

Question 16

Uneven curvature of the corneas causes

Accepted Answer

A)  cataracts. 
B)  myopia. 
C)  hyperopia. 
D)  trachoma. 
E)  astigmatism. 
A)  cataracts. 
B)  myopia. 
C)  hyperopia. 
D)  trachoma. 
E)  astigmatism.

Question 17

The most common cancer of the eye is

Accepted Answer

A)  retinoblastoma. 
B)  scleral sarcoma. 
C)  malignant melanoma. 
D)  rhabdomyosarcoma. 
E)  lymphoma. 
A)  retinoblastoma. 
B)  scleral sarcoma. 
C)  malignant melanoma. 
D)  rhabdomyosarcoma. 
E)  lymphoma.

Question 18

The organ of Corti

Accepted Answer

A)  functions in the awareness of motion and the sense of equilibrium. 
B)  controls the sense of depth perception. 
C)  converts sound vibrations into impulses that enable hearing. 
D)  secretes cerebrospinal fluid. 
E)  detects light energy. 
A)  functions in the awareness of motion and the sense of equilibrium. 
B)  controls the sense of depth perception. 
C)  converts sound vibrations into impulses that enable hearing. 
D)  secretes cerebrospinal fluid. 
E)  detects light energy.

Question 19

The part of the eye that may be colored (e.g., brown, blue, green, or gray) is the

Accepted Answer

A)  retina. 
B)  sclera. 
C)  choroid. 
D)  cornea. 
E)  iris. 
A)  retina. 
B)  sclera. 
C)  choroid. 
D)  cornea. 
E)  iris.

Question 20

The ciliary muscle

Accepted Answer

A)  controls the eardrum. 
B)  controls the shape of the lens to allow focusing. 
C)  holds the bones of the middle ear in place. 
D)  enables the eyeball to move so that a person may see an object without moving the head. 
E)  is responsible for the size of the pupil in different light intensities. 
A)  controls the eardrum. 
B)  controls the shape of the lens to allow focusing. 
C)  holds the bones of the middle ear in place. 
D)  enables the eyeball to move so that a person may see an object without moving the head. 
E)  is responsible for the size of the pupil in different light intensities.

Exam 14: Sensory Systems

The major function of a receptor is to

From an evolutionary standpoint, why is it important to have more bitter-sensing taste buds than any other type?

The "blind spot" is the point in the eye where the

The loudness of sound is measured in

The jellylike substance that fills the chamber behind the lens is

Olfactory centers are responsive to

Selecting the Exception Four of the five answers listed below are functionally connected to each other. Select the exception.

Interpretation of smell is accomplished

The carotid bodies detect carbon dioxide in the blood and is, therefore, a

When light hits the retina, the image is

Visual pigments are molecules made of

Some MP3 players or iPods produce sounds over

The vomeronasal organ is used to detect

Rods and cones are located in the

Free nerve endings detect all of the following EXCEPT

Uneven curvature of the corneas causes

The most common cancer of the eye is

The organ of Corti

The part of the eye that may be colored (e.g., brown, blue, green, or gray) is the

The ciliary muscle

Learning About Human Biology

Chemistry of Life

Cells and How They Work

Tissues, Organs, and Organ Systems

The Skeletal System

The Muscular System

Circulation: the Heart and Blood Vessels

Blood

Immunity and Disease

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Digestion and Nutrition

The Urinary System

The Nervous System

The Endocrine System

Reproductive Systems

Development and Aging

Cell Reproduction

Introduction to Genetics

Chromosomes and Human Genetics

DNA, Genes, and Biotechnology

Genes and Disease: Cancer

Principles of Evolution

Principles of Ecology

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