Question 1

The germ layer called the endoderm develops into:

Accepted Answer

A)  Skin
B)  Nervous system
C)  Liver
D)  Bone
E)  MusclesF) C) and D)
G) None of the above

Question 2

The most common way that living organisms maintain homeostasis is by positive feedback mechanisms.

Accepted Answer

A) True 
 B)False

Question 3

Cancers that arise in tissues that give rise to blood are termed:

Accepted Answer

A)  Melanomas
B)  Lymphomas
C)  Sarcomas
D)  Carcinomas
E)  HybridomasF) A) and B)
G) All of the above

Question 4

Collagen and elastin are:

Accepted Answer

A)  Fibrous proteins secreted by fibroblasts
B)  Secreted by fibroblasts
C)  Enzymes
D)  Enzymes secreted by fibroblasts
E)  Fibrous proteinsF) B) and E)
G) A) and E)

Question 5

Why isn't protection from skin cancer a good explanation for the selective advantage of producing melanin?

Accepted Answer

A)  Because skin cancer is not fatal
B)  Because skin cancer does not affect vitamin levels
C)  Because skin cancer doesn't affect reproductive success
D)  Because skin cancer is not passed on to offspring
E)  Because skin cancer is not caused by UV lightF) A) and B)
G) None of the above

Question 6

What is the primary function of melanin?

Accepted Answer

A)  Increasing light absorption
B)  Decreased water loss
C)  Increased muscle strength
D)  Absorption of UV light
E)  Increased synthesis of vitaminsF) A) and B)
G) D) and E)

Question 7

At the same latitude,a person with dark skin would have which levels of folic acid and vitamin D relative to a person with light skin?

Accepted Answer

A)  Folic acid and vitamin D levels would be the same in both
B)  Increase in both folic acid and vitamin D
C)  Decreased folic acid and increased vitamin D
D)  Decrease in both folic acid and vitamin D
E)  Increased folic acid and decreased vitamin DF) None of the above
G) C) and D)

Question 8

Why is light skin more prevalent in people whose ancestors were from higher latitudes far from the equator?

Accepted Answer

A)  Decreased melanin promotes the synthesis of folic acid, but the low light available does not destroy vitamin D
B)  Decreased melanin promotes the synthesis of folic acid and vitamin D
C)  Decreased melanin promotes the synthesis of vitamin D, but the low light available does not destroy folic acid
D)  Melanin is not needed given the low level of light and requires energy to produce
E)  Our common human ancestors had light skin, and dark skin arose earlier as humans moved near the equatorF) B) and D)
G) C) and D)

Question 9

A type of gland that secretes an oily substance that softens and protects hair is a(an) :

Accepted Answer

A)  Salivary gland
B)  Mammary gland
C)  Sweat gland
D)  Sebaceous gland
E)  Endocrine glandF) All of the above
G) B) and C)

Question 10

Why is dark skin more prevalent in people whose ancestors were from lower latitudes near the equator?

Accepted Answer

A)  Increased melanin prevents the breakdown of vitamin D, but enough light is available to make folic acid
B)  Increased melanin prevents the breakdown of folic acid and vitamin D
C)  Increased melanin prevents skin cancer
D)  Increased melanin prevents the breakdown of folic acid, but enough light is available to make vitamin D
E)  Increased melanin prevents skin cancer and protects vitamin DF) B) and D)
G) B) and E)

Question 11

When a blood clot begins to form,the enzyme thrombin is formed.Thrombin then activates the enzymes that produce more thrombin.This is an example of which of the following?

Accepted Answer

A)  Negative feedback
B)  Positive feedback
C)  Endocrine feedback
D)  Nervous feedback
E)  Hormonal feedbackF) B) and E)
G) C) and E)

Question 12

The study of an organism's structure is:

Accepted Answer

A)  Physiology
B)  Kinesiology
C)  Endocrinology
D)  Anatomy
E)  ImmunologyF) A) and E)
G) C) and E)

Question 13

The primary function of muscle tissue is:

Accepted Answer

A)  Contraction
B)  Absorption
C)  Secretion
D)  Impulse transmission
E)  CompressionF) A) and B)
G) B) and E)

Question 14

If body temperature is too high the hypothalamus stimulates blood vessels in the skin to constrict.

Accepted Answer

A) True 
 B)False

Question 15

The most common way that living organisms maintain homeostasis is by negative feedback mechanisms.

Accepted Answer

A) True 
 B)False

Question 16

The type of cell that produces fine fibers of collagen in cartilage is an osteocyte.

Accepted Answer

A) True 
 B)False

Question 17

One way humans maintain body temperature is by increasing blood flow to the skin and sweating.Which organ systems are interacting in this process?

Accepted Answer

A)  Circulatory and muscular
B)  Muscular and integumentary
C)  Endocrine and muscular
D)  Circulatory and integumentary
E)  Endocrine and circulatoryF) A) and B)
G) None of the above

Question 18

The study of the function of all of the body's parts is:

Accepted Answer

A)  Anatomy
B)  Physiology
C)  Pathology
D)  Histology
E)  GeneticsF) A) and C)
G) C) and D)

Question 19

All connective tissues except blood contain fibroblasts.

Accepted Answer

A) True 
 B)False

Question 20

An action that counters an existing condition is:

Accepted Answer

A)  Termed negative feedback
B)  A mistake
C)  Termed positive feedback
D)  Termed directional controlE) A) and B)
F) A) and C)

Exam 24: Animal Tissues, organ Systems and Homeostasis

The primary function of muscle tissue is:

Correct AnswerverifiedShow Answer

Why is dark skin more prevalent in people whose ancestors were from lower latitudes near the equator?

Correct AnswerverifiedShow Answer

The study of the function of all of the body's parts is:

Correct AnswerverifiedShow Answer

If body temperature is too high the hypothalamus stimulates blood vessels in the skin to constrict.

Correct AnswerverifiedShow Answer

When a blood clot begins to form,the enzyme thrombin is formed.Thrombin then activates the enzymes that produce more thrombin.This is an example of which of the following?

Correct AnswerverifiedShow Answer

Collagen and elastin are:

Correct AnswerverifiedShow Answer

Cancers that arise in tissues that give rise to blood are termed:

Correct AnswerverifiedShow Answer

The study of an organism's structure is:

Correct AnswerverifiedShow Answer

The type of cell that produces fine fibers of collagen in cartilage is an osteocyte.

Correct AnswerverifiedShow Answer

The most common way that living organisms maintain homeostasis is by negative feedback mechanisms.

Correct AnswerverifiedShow Answer

A type of gland that secretes an oily substance that softens and protects hair is a(an) :

Correct AnswerverifiedShow Answer

Why is light skin more prevalent in people whose ancestors were from higher latitudes far from the equator?

Correct AnswerverifiedShow Answer

At the same latitude,a person with dark skin would have which levels of folic acid and vitamin D relative to a person with light skin?

Correct AnswerverifiedShow Answer

Why isn't protection from skin cancer a good explanation for the selective advantage of producing melanin?

Correct AnswerverifiedShow Answer

An action that counters an existing condition is:

Correct AnswerverifiedShow Answer

One way humans maintain body temperature is by increasing blood flow to the skin and sweating.Which organ systems are interacting in this process?

Correct AnswerverifiedShow Answer

The most common way that living organisms maintain homeostasis is by positive feedback mechanisms.

Correct AnswerverifiedShow Answer

The germ layer called the endoderm develops into:

Correct AnswerverifiedShow Answer

What is the primary function of melanin?

Correct AnswerverifiedShow Answer

All connective tissues except blood contain fibroblasts.

Correct AnswerverifiedShow Answer

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