Q: Which equation best represents the process of phagocytosis by a neutrophil?

$$\text{Pathogen} + \text{Neutrophil} \rightarrow \text{Phagosome} \rightarrow \text{Phagolysosome} \rightarrow \text{Destruction}$$

Question 1

Which of the following best describes the role of the skin in the immune system?

Accepted Answer

It acts as a physical barrier and is considered the first line of innate defense.

Question 2

Which statement about innate immunity is correct?

Accepted Answer

Innate immunity is present at birth and does not require previous exposure to pathogens.

Question 3

A patient inhales a pathogen. Which anatomical structure is most likely to act as the first line of defense?

Accepted Answer

Mucosal lining of the respiratory tract

Question 4

Which of the following is NOT a characteristic of innate immunity?

Accepted Answer

It is highly specific and adapts to new pathogens.

Question 5

Which cell type is most abundant and typically the first to arrive at the site of infection?

Accepted Answer

Neutrophils

Question 6

What is the primary function of macrophages in the immune response?

Accepted Answer

Phagocytosis and destruction of pathogens

Question 7

Which process describes how a neutrophil destroys a pathogen after phagocytosis?

Accepted Answer

Fusion of the phagosome with a lysosome, forming a phagolysosome

Question 8

Which of the following is a chemical produced by immune cells to destroy pathogens?

Accepted Answer

Free radicals

Question 9

What is the main difference between innate and adaptive immunity?

Accepted Answer

Innate immunity is non-specific and present at birth, while adaptive immunity is specific and develops after exposure.

Question 10

Which of the following best explains why inflammation occurs during infection?

Accepted Answer

It is a response to tissue injury that helps recruit immune cells and promote healing.

Question 11

Which equation best represents the process of phagocytosis by a neutrophil?

Accepted Answer

$$	ext{Pathogen} + 	ext{Neutrophil} ightarrow 	ext{Phagosome} ightarrow 	ext{Phagolysosome} ightarrow 	ext{Destruction}$$

Question 12

A patient is exposed to the influenza virus for the first time. Which immune response will act first?

Accepted Answer

Innate immunity, including physical barriers and phagocytic cells

Question 13

Which of the following is a function of natural killer (NK) cells?

Accepted Answer

Destroying abnormal or mutated cells that do not express normal self markers

Question 14

Which of the following best describes the role of toll-like receptors (TLRs) in immunity?

Accepted Answer

They recognize patterns associated with pathogens and activate immune responses.

Question 15

Which step is necessary for a neutrophil to destroy a pathogen after phagocytosis?

Accepted Answer

Fusion of the phagosome with a lysosome to form a phagolysosome

Question 16

Which of the following is a correct sequence of events during inflammation?

Accepted Answer

$$	ext{Tissue injury} ightarrow 	ext{Release of chemical mediators} ightarrow 	ext{Recruitment of immune cells} ightarrow 	ext{Healing}$$

Question 17

Which of the following is a reason why some pathogens are not destroyed by phagocytes?

Accepted Answer

They are resistant to digestive enzymes within the phagolysosome.

Question 18

Which of the following is a function of inflammation in tissue repair?

Accepted Answer

It recruits immune cells to the site of injury and promotes healing.

Question 19

Which of the following best describes the process of opsonization?

Accepted Answer

Coating of pathogens with molecules that enhance phagocytosis

Question 20

A cell is found to have abnormal proteins on its surface and is not following a normal cell cycle. Which immune cell is most likely to target and destroy this cell?

Accepted Answer

Natural killer (NK) cell

Innate Immunity and the Body’s First Lines of Defense

스터디 가이드 - 연습 문제

학습 가이드 - 플래시카드