Question 1

An immunization that uses prepared antibodies from a human or animal donor and that does not provide long-lasting protection is called ________ immunity.

Accepted Answer

The answer of An immunization that uses prepared antibodies from...

Question 2

Infection by HIV can eventually lead to the development of a condition called ________, which is diagnosed when the T helper cell count drops below ________.

Accepted Answer

AIDS (acqu...

Question 3

The advantage of having memory cells in specific defenses is that

Accepted Answer

A)   they remain in an active state, continuously producing antibodies.
B)   if exposed to an antigen a second time, they quickly become plasma cells.
C)   they prevent production of other proteins so that antibodies can be produced.
D)   they produce antibodies and can become phagocytic.
E)   they prevent viruses from entering the body a second time.

Question 4

Which one of the following would result in passive immunity?

Accepted Answer

A)   vaccination
B)   past occurrence of an infection or disease
C)   production of memory cells
D)   movement of antibodies across the placenta from mother to child
E)   stimulation of T cells and B cells by an antigen

Question 5

Which one of the following diseases is caused by a virus?

Accepted Answer

A)   rabies
B)   Lyme disease
C)   syphilis
D)   toxic shock syndrome
E)   tuberculosis

Question 6

Once a prion enters a nerve cell, it essentially

Accepted Answer

A)   assumes the correct folding orientation for the protein.
B)   stops the cascade of misfolding events associated with adjacent cells.
C)   becomes self-propagating, causing misfolding of nearby normal proteins.
D)   differentiates into a nonreplicating virus.
E)   differentiates into a replicating virus.

Question 7

HIV is classified as a retrovirus because

Accepted Answer

A)   it infects only cells with a CD4 receptor.
B)   it makes a DNA copy of its RNA once inside the host cell.
C)   this virus is composed of two cells surrounded by a lipoprotein coat.
D)   it reverts to an inactive form when it infects B lymphocytes.
E)   it causes the production of HIV antibodies.

Question 8

Which of the following leukocytes is most likely to be directly involved in the destruction of flukes (a parasitic flatworm) ?

Accepted Answer

A)   natural killer cells
B)   eosinophils
C)   neutrophils
D)   B lymphocytes
E)   basophils

Question 9

All of the following are involved in the generation of an allergic response EXCEPT which one?

Accepted Answer

A)   allergen
B)   IgE
C)   IgG
D)   mast cells and basophils
E)   histamine

Question 10

The only T lymphocyte that directly attacks and destroys other cells is the ________ T cell.

Accepted Answer

The answer of The only T lymphocyte that directly attacks...

Question 11

Which one of the following types of T cells is a critical component of the immune system because it stimulates and enhances the activity of other components of the immune system?

Accepted Answer

A)   T suppressor cell
B)   T memory cell
C)   T helper cell
D)   cytotoxic T cell
E)   natural killer cells

Question 12

Match each component of the lymphatic system to its function.
-transports lymph in the body

Accepted Answer

A)  tonsil
B)  lymphatic vessel
C)  spleen
D)  lymph node
E)  thymus

Question 13

Ebola virus can be transmitted via

Accepted Answer

A)   fruit fallen from a tree.
B)   direct contact with bodily fluids of an infected person.
C)   agriculture/crops in an epidemic area.
D)   any contact, like a handshake.

Question 14

Why do some physicians advise patients with a bladder infection to drink a lot of cranberry juice?

Accepted Answer

A)   Cranberry juice contains chemicals that kill viruses and bacteria.
B)   The increased volume of fluid in the bladder causes bacterial cells to burst as they absorb the excess fluid.
C)   Cranberry juice makes the urine more acidic, decreasing the rate at which microorganisms can grow and reproduce.
D)   Cranberry juice increases the efficiency of urine production by the kidneys.
E)   Cranberry juice enhances the action of phagocytic cells.

Question 15

Match each component of the lymphatic system to its function.
-filters microorganisms and cellular debris from lymph

Accepted Answer

A)  tonsil
B)  lymphatic vessel
C)  spleen
D)  lymph node
E)  thymus

Question 16

Which one of the following is characteristic of T lymphocytes but NOT B lymphocytes?

Accepted Answer

A)   direct attack of antigen-bearing cells
B)   production of immunoglobulins
C)   maturation in the red bone marrow
D)   production of plasma cells
E)   antibody-mediated immunity

Question 17

When comparing viruses and bacteria, which one of the following statements is CORRECT?

Accepted Answer

A)   Viruses are larger than bacteria.
B)   Viruses are pathogens; bacteria are decomposers.
C)   Viruses have membrane-bound organelles; bacteria do not have membrane-bound organelles.
D)   Viruses and bacteria are both able to reproduce on their own.
E)   Viruses and bacteria both contain genetic material.

Question 18

The human body uses three lines of defense to protect against pathogens. Match each of the following categories of defense to the type of cell or mechanism involved in the defense. Answers may be used more than once.
-production of antibodies by plasma cells

Accepted Answer

A)  physical or chemical barrier
B)  specific defense mechanism
C)  nonspecific defense mechanism

Exam 9: The Immune System and Mechanisms of Defense

The human body uses three lines of defense to protect against pathogens. Match each of the following categories of defense to the type of cell or mechanism involved in the defense. Answers may be used more than once. -production of antibodies by plasma cells

Correct Answer
verified

Match each component of the lymphatic system to its function. -filters microorganisms and cellular debris from lymph

Correct Answer
verified

Match each component of the lymphatic system to its function. -transports lymph in the body

Correct Answer
verified

Why do some physicians advise patients with a bladder infection to drink a lot of cranberry juice?

Correct Answer
verified

Once a prion enters a nerve cell, it essentially

Correct Answer
verified

Ebola virus can be transmitted via

Correct Answer
verified

An immunization that uses prepared antibodies from a human or animal donor and that does not provide long-lasting protection is called ________ immunity.

Correct Answer
verified

Which one of the following diseases is caused by a virus?

Correct Answer
verified

The only T lymphocyte that directly attacks and destroys other cells is the ________ T cell.

Correct Answer
verified

All of the following are involved in the generation of an allergic response EXCEPT which one?

Correct Answer
verified

Infection by HIV can eventually lead to the development of a condition called , which is diagnosed when the T helper cell count drops below .

Correct Answer
verified
AIDS (acqu...
View Answer

HIV is classified as a retrovirus because

Correct Answer
verified

Which one of the following would result in passive immunity?

Correct Answer
verified

The advantage of having memory cells in specific defenses is that

Correct Answer
verified

Which one of the following types of T cells is a critical component of the immune system because it stimulates and enhances the activity of other components of the immune system?

Correct Answer
verified

Which one of the following is characteristic of T lymphocytes but NOT B lymphocytes?

Correct Answer
verified

Which of the following leukocytes is most likely to be directly involved in the destruction of flukes (a parasitic flatworm) ?

Correct Answer
verified

When comparing viruses and bacteria, which one of the following statements is CORRECT?

Correct Answer
verified

Exam 9: The Immune System and Mechanisms of Defense

The human body uses three lines of defense to protect against pathogens. Match each of the following categories of defense to the type of cell or mechanism involved in the defense. Answers may be used more than once. -production of antibodies by plasma cells

Correct AnswerverifiedShow Answer

Match each component of the lymphatic system to its function. -filters microorganisms and cellular debris from lymph

Correct AnswerverifiedShow Answer

Match each component of the lymphatic system to its function. -transports lymph in the body

Correct AnswerverifiedShow Answer

Why do some physicians advise patients with a bladder infection to drink a lot of cranberry juice?

Correct AnswerverifiedShow Answer

Once a prion enters a nerve cell, it essentially

Correct AnswerverifiedShow Answer

Ebola virus can be transmitted via

Correct AnswerverifiedShow Answer

An immunization that uses prepared antibodies from a human or animal donor and that does not provide long-lasting protection is called ________ immunity.

Correct AnswerverifiedShow Answer

Which one of the following diseases is caused by a virus?

Correct AnswerverifiedShow Answer

The only T lymphocyte that directly attacks and destroys other cells is the ________ T cell.

Correct AnswerverifiedShow Answer

All of the following are involved in the generation of an allergic response EXCEPT which one?

Correct AnswerverifiedShow Answer

Infection by HIV can eventually lead to the development of a condition called ________, which is diagnosed when the T helper cell count drops below ________.

Correct AnswerverifiedAIDS (acqu...View AnswerShow Answer

HIV is classified as a retrovirus because

Correct AnswerverifiedShow Answer

Which one of the following would result in passive immunity?

Correct AnswerverifiedShow Answer

The advantage of having memory cells in specific defenses is that

Correct AnswerverifiedShow Answer

Which one of the following types of T cells is a critical component of the immune system because it stimulates and enhances the activity of other components of the immune system?

Correct AnswerverifiedShow Answer

Which one of the following is characteristic of T lymphocytes but NOT B lymphocytes?

Correct AnswerverifiedShow Answer

Which of the following leukocytes is most likely to be directly involved in the destruction of flukes (a parasitic flatworm) ?

Correct AnswerverifiedShow Answer

When comparing viruses and bacteria, which one of the following statements is CORRECT?

Correct AnswerverifiedShow Answer

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Infection by HIV can eventually lead to the development of a condition called , which is diagnosed when the T helper cell count drops below .

Correct Answer
verified
AIDS (acqu...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
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