Micro Chapter 15 And 16

Front 1

The first and second lines of defense against microbial invasion are part of
A) innate immunity.
B) adaptive immunity.
C) species resistance.
D) microbial antagonism.
E) both species resistance and adaptive immunity.

Back 1

A) innate immunity.

Front 2

Which of the following are phagocytic cells found in the epidermis?
A) neutrophils
B) natural killer lymphocytes
C) microglia
D) dendritic cells
E) wandering macrophages

Back 2

D) dendritic cells

Front 3

Response to specific pathogens that can improve with subsequent exposure is
A) the first line of defense.
B) the second line of defense.
C) the third line of defense.
D) microbial antagonism.
E) innate immunity.

Back 3

C) the third line of defense.

Front 4

Which of the following cells increase in number during a helminth infection?
A) basophils
B) macrophages
C) neutrophils
D) eosinophils
E) lymphocytes

Back 4

D) eosinophils

Front 5

Which of the following areas of the body have mucous membranes?

A) mouth

B) nasal cavity

C) urinary system

D) mouth and nasal cavity

E) mouth, nasal cavity, and urinary system

Back 5

E) mouth, nasal cavity, and urinary system

Front 6

Protection from infection known as species resistance is a result of
A) the lack of suitable environment in the body.
B) the absence of receptors required for microbial attachment.
C) the presence of phagocytes in the tissues.D) the salty, acidic condition of normal skin.
E) both the absence of necessary receptors and lack of suitable environment in the body

Back 6

E) both the absence of necessary receptors and lack of suitable environment in the body

Front 7

Which of the following statements regarding the surface of the skin is false?

A) It has sebum as a coating.

B) It has normal microbiota.

C) It has goblet cells.

D) It is salty.

E) It is acidic.

Back 7

C) It has goblet cells.

Front 8

Which of the following contributes to protecting the eyes from microbial invasion?
A) Tears contain lysozyme and salt.
B) A mucus layer traps and removes microbes.
C) Tears mechanically flush particles from the eyes.
D) Tears contain lysozyme and salt and mechanically flush particles from the eyes.
E) Tears and mucus combine to trap microbes and remove them.

Back 8

D) Tears contain lysozyme and salt and mechanically flush particles from the eyes.

Front 9

Which of the following is the best definition of "microbial antagonism"?
A) the presence of pathogens on the surface of the skin, which will invade the body through abrasions
B) the presence of normal microbiota that protect the body by competing with pathogens in a variety of ways to prevent pathogens from invading the body
C) the presence of normal microbiota that can become pathogens under certain conditions
D) the ability of microbiota to mutate into pathogens
E) the presence of resident bacteria on the surface of the body and in cavities that connect to the surface

Back 9

B) the presence of normal microbiota that protect the body by competing with pathogens in a variety of ways to prevent pathogens from invading the body

Front 10

Mucous membranes are quite thin and fragile. How can such delicate tissue provide defense against microbial invaders?
A) The mucus secreted by the mucous membrane physically traps microbes.
B) The mucus contains a variety of antimicrobial chemicals and molecules.
C) Both the mucus and the outer layer of cells are shed frequently.
D) The mucus is a physical trap that contains a variety of antimicrobial chemicals.
E) The mucus physically traps microbes, contains a variety of antimicrobial chemicals, and is shed constantly, along with the outermost layer of cells.

Back 10

E) The mucus physically traps microbes, contains a variety of antimicrobial chemicals, and is shed constantly, along with the outermost layer of cells.