HPP The Immune System I Quiz

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What is the primary function of physical barriers in the immune system?

To recognize specific pathogens

To prevent the entry of most microorganisms into the body (correct)

To produce a wide range of immune responses

To activate effector lymphocytes

What is the characteristic of nonspecific (or innate) immunity?

It provides a stronger defense against a specific pathogen

It provides the first defenses against pathogens regardless of the type of pathogen (correct)

It involves the activation of effector lymphocytes

It is acquired after birth

What is the function of leukocytes in the immune system?

To recognize specific pathogens

To produce a wide range of immune responses

To provide physical barriers against pathogens

To phagocytose foreign matter (correct)

What is the difference between specific and nonspecific immunity?

Specific immunity provides a stronger defense against a specific pathogen, while nonspecific immunity provides the first defenses against pathogens (D) Signup and view all the answers

What is the role of the spleen in the immune system?

It filters the blood and removes pathogens (C) Signup and view all the answers

What is the characteristic of adaptive immunity?

It develops after birth and provides a stronger defense against a specific pathogen (B) Signup and view all the answers

What is the primary function of sebum secreted by sebaceous glands?

To lubricate the hair and inhibit bacterial growth (B) Signup and view all the answers

What is the role of lysozymes in tears and sweat?

To digest proteoglycans in the cell walls of bacteria (B) Signup and view all the answers

What is the function of ciliated mucosa in the respiratory tract?

To catch microorganisms in mucus and transport them out of the body (D) Signup and view all the answers

What is the role of commensals in the gut?

To prevent the attachment of pathogens and compete with them for essential nutrients (B) Signup and view all the answers

What is the main function of leukocytes in the body?

To protect the body against infection and disease (A) Signup and view all the answers

What is the role of stomach mucous membranes in preventing infection?

To produce acid that kills most microorganisms that enter the gut (D) Signup and view all the answers

What is the primary function of the immune system?

To eliminate potentially disease-causing agents (A) Signup and view all the answers

Which type of immunity involves recognizing and eliminating materials foreign to the body?

Adaptive immunity (D) Signup and view all the answers

What is the main obstacle to successful organ transplantation?

The immune system's recognition of 'self' (D) Signup and view all the answers

Which process does the immune system participate in?

Wound healing (C) Signup and view all the answers

What does the immune system reject in addition to foreign materials?

Healthy cells of 'self' (C) Signup and view all the answers

Which component of the immune system regulates the intensity and duration of the immune response?

Cytokines (C) Signup and view all the answers