Question 1

Melanin is a substance responsible for

Accepted Answer

A)   cell growth.
B)   muscle contraction.
C)   nerve impulses.
D)   skin pigmentation to protect from harmful light.
E)   increases blood flow to the epidermis.F) B) and E)
G) All of the above

Question 2

Usually it is not possible to penetrate inside a body cavity without cutting through protective tissues. However, sperm reach the egg without crossing any epidermal barrier. After traveling through the vagina, which body cavity will the sperm enter?

Accepted Answer

A)   thoracic
B)   pelvic
C)   pericardial
D)   dorsal
E)   pleuralF) A) and D)
G) A) and C)

Question 3

Which of the following is an organ system?

Accepted Answer

A)   muscular
B)   nervous
C)   urinary
D)   epithelial
E)   connectiveF) B) and E)
G) C) and D)

Question 4

In which direction does a nerve impulse usually move?

Accepted Answer

A)   cell body → dendrite → axon
B)   dendrite → axon → cell body
C)   dendrite → cell body → axon
D)   axon → cell body → dendrite
E)   axon → dendrite → cell bodyF) B) and E)
G) All of the above

Question 5

To which system does the spinal cord belong?

Accepted Answer

A)   urinary
B)   nervous
C)   integumentary
D)   endocrine
E)   musculoskeletalF) B) and E)
G) A) and D)

Question 6

What is the main reason for the presence of a pimple?

Accepted Answer

A)   increased production of sebum
B)   increased levels of hormones
C)   the presence of Propionibacterium acnes
D)   inflammatory response
E)   All of the answer choices are reasons for the presence of a pimple.F) A) and B)
G) A) and C)

Question 7

Blood is unlike other types of connective tissue in that the matrix is not made by the cells.

Accepted Answer

A) True 
 B)False

Question 8

What type of bone contains numerous bony plates separated by irregular spaces?

Accepted Answer

A)   compact
B)   spongy
C)   marrow
D)   elastic
E)   fibrousF) All of the above
G) B) and D)

Question 9

What is the numerical relationship of neuroglial cells compared to neurons?

Accepted Answer

A)   Because they are big, one neuroglial cell can serve many neurons, so there are about nine neurons for every neuroglial cell.
B)   There are about an equal number of both; each neuron has a companion neuroglial cell.
C)   There are about nine neuroglial cells for every neuron.
D)   The numbers vary widely from animal to animal and depend on the size of the animal.
E)   Brain volume is made of approximately two-thirds neurons and one-third neuroglial cells.F) A) and E)
G) A) and C)

Question 10

Which of the following functions would not be lost or seriously compromised if someone suffered a severe burn over most of their body?

Accepted Answer

A)   prevention of heat and water loss
B)   prevention of massive and continuous infection from invasion by external bacteria, viruses, and parasites
C)   production of sweat that evaporates and cools the body when it is overheating
D)   protection of muscle and other surface tissues from abrasion and pain
E)   exchange of gasesF) C) and D)
G) A) and B)

Question 11

Which function is correctly matched to its type of tissue?

Accepted Answer

A)   Adipose tissue stores fat.
B)   Reticular connective tissue supports lymphoid tissue.
C)   Connective tissues bind organs together and provide support and protection.
D)   Loose, fibrous connective tissue encloses internal organs, including muscles.
E)   All of the answer choices are true.F) All of the above
G) A) and B)

Question 12

Why would it make sense to have the birthing process controlled by a positive feedback loop?

Accepted Answer

A)   because there is a definite cutoff point to be reached
B)   because birth is a positive experience
C)   because there is no sensor involved
D)   because there is no stimulus involved
E)   because there is a fluctuation of hormones above and below the level necessary to induce birthF) B) and D)
G) C) and D)

Question 13

A person enters a heat chamber carrying a raw egg on a plate. As the temperature is gradually increased, the exposed egg is cooked while the subject maintains a normal internal temperature. What mechanism is lacking in the egg but is present in the human subject that maintains homeostasis?

Accepted Answer

A)   Lack of a circulatory system prevents the egg from distributing the heat.
B)   The egg cannot "breathe away" hot air to "air condition" its body.
C)   The surface-area-to-volume ratio prevents the smaller body from losing heat as fast.
D)   Increased sweating causes evaporation that carries away heat.
E)   The human subject contains more fluid volume to absorb heat.F) A) and E)
G) None of the above

Question 14

A home heating system is an example of a positive feedback mechanism.

Accepted Answer

A) True 
 B)False

Question 15

If you wash your skin and hair many times a day, you will soon have dry skin that cracks and bleeds because you have removed the ________ secreted by ________ that is necessary to keep the skin supple.

Accepted Answer

A)   salty sweat; sweat glands
B)   pili; erectors
C)   lymph; lymphatic ducts
D)   sebum; sweat glands
E)   sebum; oil glandsF) All of the above
G) A) and B)

Question 16

Which of the following body systems rids the body of metabolic wastes and helps regulate the fluid balance and pH of the blood?

Accepted Answer

A)   cardiovascular
B)   muscular
C)   lymphatic
D)   urinary
E)   endocrineF) C) and D)
G) A) and B)

Question 17

Which of these is part of a neuron?

Accepted Answer

A)   cell body
B)   dendrite
C)   axon
D)   nucleus
E)   All of the answer choices are parts of a neuron.F) B) and D)
G) A) and B)

Question 18

An example of a negative feedback system is when there is too much of a particular chemical in the body and a sensor detects it and brings about a response that causes the levels to drop.

Accepted Answer

A) True 
 B)False

Question 19

Which system is one of the two main body systems that helps maintain homeostasis by regulating other body systems?

Accepted Answer

A)   digestive
B)   endocrine
C)   respiratory
D)   lymphatic
E)   cardiovascularF) All of the above
G) B) and D)

Question 20

What type of epithelium contains thin, flat cells stacked upon each other?

Accepted Answer

A)   simple squamous
B)   stratified squamous
C)   simple cuboidal
D)   stratified cuboidal
E)   simple columnarF) A) and C)
G) C) and E)

Exam 11: Human Organization

A person enters a heat chamber carrying a raw egg on a plate. As the temperature is gradually increased, the exposed egg is cooked while the subject maintains a normal internal temperature. What mechanism is lacking in the egg but is present in the human subject that maintains homeostasis?

Correct AnswerverifiedShow Answer

What is the numerical relationship of neuroglial cells compared to neurons?

Correct AnswerverifiedShow Answer

Usually it is not possible to penetrate inside a body cavity without cutting through protective tissues. However, sperm reach the egg without crossing any epidermal barrier. After traveling through the vagina, which body cavity will the sperm enter?

Correct AnswerverifiedShow Answer

Why would it make sense to have the birthing process controlled by a positive feedback loop?

Correct AnswerverifiedShow Answer

Which of the following functions would not be lost or seriously compromised if someone suffered a severe burn over most of their body?

Correct AnswerverifiedShow Answer

Which system is one of the two main body systems that helps maintain homeostasis by regulating other body systems?

Correct AnswerverifiedShow Answer

What type of epithelium contains thin, flat cells stacked upon each other?

Correct AnswerverifiedShow Answer

Melanin is a substance responsible for

Correct AnswerverifiedShow Answer

If you wash your skin and hair many times a day, you will soon have dry skin that cracks and bleeds because you have removed the ________ secreted by ________ that is necessary to keep the skin supple.

Correct AnswerverifiedShow Answer

What type of bone contains numerous bony plates separated by irregular spaces?

Correct AnswerverifiedShow Answer

What is the main reason for the presence of a pimple?

Correct AnswerverifiedShow Answer

To which system does the spinal cord belong?

Correct AnswerverifiedShow Answer

A home heating system is an example of a positive feedback mechanism.

Correct AnswerverifiedShow Answer

Which of the following body systems rids the body of metabolic wastes and helps regulate the fluid balance and pH of the blood?

Correct AnswerverifiedShow Answer

Blood is unlike other types of connective tissue in that the matrix is not made by the cells.

Correct AnswerverifiedShow Answer

In which direction does a nerve impulse usually move?

Correct AnswerverifiedShow Answer

Which of these is part of a neuron?

Correct AnswerverifiedShow Answer

An example of a negative feedback system is when there is too much of a particular chemical in the body and a sensor detects it and brings about a response that causes the levels to drop.

Correct AnswerverifiedShow Answer

Which of the following is an organ system?

Correct AnswerverifiedShow Answer

Which function is correctly matched to its type of tissue?

Correct AnswerverifiedShow Answer

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If you wash your skin and hair many times a day, you will soon have dry skin that cracks and bleeds because you have removed the secreted by that is necessary to keep the skin supple.

Correct Answer
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