Immunity
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Questions and Answers

What is the main function of the sticky mucus on mucous membranes?

  • To provide a physical trap for pathogens (correct)
  • To kill pathogens immediately upon contact
  • To stimulate the immune response
  • To aid in nutrient absorption

How do hairs in the nose and ears protect the body from pathogens?

  • By producing antibodies to fight pathogens
  • By creating a physical barrier against pathogens (correct)
  • By absorbing pathogens into the bloodstream
  • By neutralizing pathogens through chemical reactions

Which body surface is protected by beneficial microorganisms that combat disease-causing organisms?

  • Respiratory tract
  • Skin
  • Digestive system (correct)
  • Eyes

What is the role of the acidic stomach secretions in protecting the body?

<p>Kill many pathogens entering the digestive system (D)</p> Signup and view all the answers

Which white blood cell type is able to move using amoeboid locomotion and leave the blood to go to infected tissues?

<p>Neutrophils (D)</p> Signup and view all the answers

What is the main function of a macrophage in the immune system?

<p>To engulf foreign particles and pathogens (C)</p> Signup and view all the answers

Where do B cells mature?

<p>Bone marrow (C)</p> Signup and view all the answers

What type of immune response is controlled by activated B cells and antibodies?

<p>Humoral or antibody-mediated immune response (C)</p> Signup and view all the answers

What stimulates phagocytosis when present in the body?

<p>Antibodies (D)</p> Signup and view all the answers

How do antibodies interfere with viruses or bacteria?

<p>By interfering with their chemical interactions (D)</p> Signup and view all the answers

What type of immunity gives the host long-term protection from reinfection?

<p>Memory immunity (C)</p> Signup and view all the answers

Which part of the immune system produces specific antibodies?

<p>Plasma cells (C)</p> Signup and view all the answers

What is the main role of mast cells?

<p>Releasing chemicals in response to physical injury (C)</p> Signup and view all the answers

What do cytokines do in the immune system?

<p>Encourage inflammation (B)</p> Signup and view all the answers

What is the purpose of inflammation in the body?

<p>Cause capillaries to dilate (D)</p> Signup and view all the answers

Which type of white blood cell arrives early at the site of inflammation?

<p>Neutrophils (C)</p> Signup and view all the answers

How does a fever help during an infection?

<p>Inhibit pathogen growth (A)</p> Signup and view all the answers

When should a dangerously high fever be suppressed?

<p>Only suppress dangerously high fevers (B)</p> Signup and view all the answers

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

<p>Stimulate inflammation (C)</p> Signup and view all the answers

Which type of immunity involves giving antibodies from an outside source for immediate protection?

<p>Passive immunity (A)</p> Signup and view all the answers

What is the role of dendritic cells and macrophages in the immune response?

<p>Engulf and digest pathogens (C)</p> Signup and view all the answers

What is the main function of the immune factors described in the text?

<p>Creating a more efficient immune response upon re-exposure to pathogens (A)</p> Signup and view all the answers

Where are dendritic cells primarily located in the body?

<p>Skin (A)</p> Signup and view all the answers

Which type of immune response is always present and defends against all pathogens rather than focusing on specific ones?

<p>Innate immune response (C)</p> Signup and view all the answers

Which immune cells are unable to recognize pathogens without assistance?

<p>T lymphocytes (B)</p> Signup and view all the answers

What is a characteristic of external and chemical barriers described in the text?

<p>They include the skin protein keratin that resists physical entry into cells (A)</p> Signup and view all the answers

Which of the following best describes the adaptive immune response as per the text?

<p>It stores information about past infections (D)</p> Signup and view all the answers

What happens to antigen fragments once they are transported to the surface of an antigen-presenting cell?

<p>They act as indicators to other immune cells (D)</p> Signup and view all the answers

What is the role of pathogens in relation to hosts as explained in the text?

<p>Bacteria, protists, fungi, and other infectious organisms can cause diseases in hosts (B)</p> Signup and view all the answers

Which statement accurately describes innate immunity according to the text?

<p>It is non-specific toward a particular kind of pathogen (C)</p> Signup and view all the answers

What is the main function of the innate immune response?

<p>Defending against all pathogens non-specifically (B)</p> Signup and view all the answers

How does the immune system respond upon re-exposure to a pathogen?

<p>By creating a more efficient response due to memory (C)</p> Signup and view all the answers

Which part of the immune system depends on physical and chemical barriers as the first line of defense?

<p>Innate immune response (D)</p> Signup and view all the answers

What is the role of cytokines in the immune response?

<p>Encourage inflammation (B)</p> Signup and view all the answers

How does a fever help during an infection?

<p>Inhibits the growth of pathogens (A)</p> Signup and view all the answers

What is the primary function of mast cells in the immune system?

<p>Encouraging inflammation (D)</p> Signup and view all the answers

Which white blood cell type is attracted to the site of inflammation and is responsible for engulfing and digesting pathogens?

<p>Neutrophils (B)</p> Signup and view all the answers

What cellular response is triggered by the cytokines released from white blood cells after pathogen recognition?

<p>Increase in core body temperature (fever) (D)</p> Signup and view all the answers

What do capillaries do in response to the chemical signals that trigger inflammation?

<p>Dilate and become more permeable (D)</p> Signup and view all the answers

What is the primary function of Natural Killer (NK) cells in the immune system?

<p>Killing cells infected with viruses or cancerous cells (A)</p> Signup and view all the answers

How does the Complement System primarily function in the immune response?

<p>Killing extracellular pathogens through cell lysis (C)</p> Signup and view all the answers

What distinguishes Adaptive Immunity from Innate Immunity?

<p>The speed of response to pathogens (A)</p> Signup and view all the answers

Which characteristic is unique to Adaptive Immunity compared to Innate Immunity?

<p>Ability to differentiate between self and non-self antigens (D)</p> Signup and view all the answers

How does the immune system respond after exposure to an antigen, as described in the text?

<p>Formation of memory cells for future defense (A)</p> Signup and view all the answers

What is the specific role of Liver cells and macrophages in the Complement System?

<p>Continuous synthesis of inactive complement proteins (B)</p> Signup and view all the answers

What is the role of cilia in the upper respiratory tract according to the text?

<p>Trap pathogens in mucus and move them up to the mouth (A)</p> Signup and view all the answers

What is the primary function of the acidic stomach secretions mentioned in the text?

<p>To kill many pathogens entering the digestive system (A)</p> Signup and view all the answers

Which statement accurately describes the role of macrophages in the immune system as per the text?

<p>Engulf foreign particles and pathogens (D)</p> Signup and view all the answers

How do beneficial microorganisms in the body protect against disease-causing organisms?

<p>By outcompeting disease-causing organisms for nutritional resources (B)</p> Signup and view all the answers

Which component of internal defenses involves cells that are nucleated and can move using amoeboid locomotion?

<p>Macrophages (D)</p> Signup and view all the answers

What is the main function of the enzyme found in saliva, mucus, and tears as per the text?

<p>Breaking down bacterial cell walls (A)</p> Signup and view all the answers

Where do T cells mature before migrating to the spleen and lymph nodes?

<p>Thymus (D)</p> Signup and view all the answers

What is the function of immunoglobulin in the immune system?

<p>Produced by plasma cells after antigen stimulation (B)</p> Signup and view all the answers

In which body fluids can antibodies be found according to the text?

<p>Blood and lymphatic system (B)</p> Signup and view all the answers

What is the role of B cells in the immune response to antigens?

<p>Producing specific antibodies (C)</p> Signup and view all the answers

How do antibodies interfere with viruses or bacteria?

<p>Neutralize viruses or bacteria to prevent infection (C)</p> Signup and view all the answers

Which immune cells are primarily attracted by antigen-antibody complexes?

<p>Macrophages (A)</p> Signup and view all the answers

Innate immunity is specific toward a particular kind of pathogen.

<p>False (B)</p> Signup and view all the answers

The adaptive immune response defends against all pathogens rather than focusing on specific ones.

<p>False (B)</p> Signup and view all the answers

The second line of defense includes physical and chemical barriers.

<p>False (B)</p> Signup and view all the answers

Protein keratin in the skin helps resist physical entry into cells.

<p>True (A)</p> Signup and view all the answers

The adaptive immune response depends on physical and chemical barriers as the first line of defense.

<p>False (B)</p> Signup and view all the answers

The immune system produces antibodies that specifically target individual pathogens.

<p>False (B)</p> Signup and view all the answers

Mucous membranes protect body openings by providing a physical trap for pathogens.

<p>True (A)</p> Signup and view all the answers

Hairs in the nose and ears protect the body by releasing enzymes that break down bacterial cell walls.

<p>False (B)</p> Signup and view all the answers

Cilia in the upper respiratory tract help move trapped pathogens up to the mouth.

<p>True (A)</p> Signup and view all the answers

The acidic surface of the skin promotes bacterial growth.

<p>False (B)</p> Signup and view all the answers

Saliva, mucus, and tears contain an enzyme that breaks down bacterial cell walls.

<p>True (A)</p> Signup and view all the answers

The acidic stomach secretions do not play a role in killing pathogens entering the digestive system.

<p>False (B)</p> Signup and view all the answers

B cells mature in the thymus.

<p>False (B)</p> Signup and view all the answers

Immunoglobulins are proteins produced by plasma cells after stimulation by an antigen.

<p>True (A)</p> Signup and view all the answers

Memory in adaptive immunity provides short-term protection from reinfection.

<p>False (B)</p> Signup and view all the answers

T cells mature at the spleen before migrating to the lymph nodes.

<p>False (B)</p> Signup and view all the answers

Antibodies circulate in the blood stream, but not in the lymphatic system.

<p>False (B)</p> Signup and view all the answers

Phagocytic cells are not attracted by antigen-antibody complexes.

<p>False (B)</p> Signup and view all the answers

Mast cells release chemicals in response to emotional injury.

<p>False (B)</p> Signup and view all the answers

Cytokines regulate cell differentiation, proliferation, and gene expression.

<p>True (A)</p> Signup and view all the answers

Inflammation is only a response to chemical irritation by pathogens.

<p>False (B)</p> Signup and view all the answers

Neutrophils are late arriving white blood cells at the site of inflammation.

<p>False (B)</p> Signup and view all the answers

A fever helps inhibit the growth of pathogens and speed up cellular repair processes.

<p>True (A)</p> Signup and view all the answers

Dangerously high fever should always be suppressed.

<p>False (B)</p> Signup and view all the answers

NK cells can kill cells infected with viruses or cancerous cells.

<p>True (A)</p> Signup and view all the answers

The Complement System is made up of approximately 10 types of proteins.

<p>False (B)</p> Signup and view all the answers

Adaptive Immunity is specific to substances and organisms that belong in the body.

<p>False (B)</p> Signup and view all the answers

The adaptive immune response takes minutes to become established.

<p>False (B)</p> Signup and view all the answers

Innate Immune Response occurs after exposure to an antigen from a pathogen or a vaccination.

<p>False (B)</p> Signup and view all the answers

The main function of macrophages is to synthesize inactive forms of complement proteins continuously.

<p>False (B)</p> Signup and view all the answers

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