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91Ó°ÊÓ

Match the following white blood cells with their respective description: Neutrophils Eosinophils Lymphocytes Monocytes (a) Released in large numbers during allergic responses (b) Agranular phagocytes (c) Most numerous leukocyte (d) Participate in specific defenses

Short Answer

Expert verified
Neutrophils - (c), Eosinophils - (a), Lymphocytes - (d), Monocytes - (b)

Step by step solution

01

Analyzing Neutrophils

Neutrophils are often considered the 'first responders' when the body is attacked by pathogens. They are the most abundant white blood cells in circulation and play a key role in our innate immune defense. Thus, they match with description (c) Most numerous leukocyte.
02

Analyzing Eosinophils

Eosinophils are white blood cells primarily involved in the response to allergies and parasitic infections. They increase significantly during allergic reactions. Therefore, they match with description (a) Released in large numbers during allergic responses.
03

Analyzing Lymphocytes

Lymphocytes are crucial components of the immune system that are involved in specific immune responses, such as producing antibodies (by B cells) and attacking infected cells (by T cells). Hence, they match with description (d) Participate in specific defenses.
04

Analyzing Monocytes

Monocytes are a type of white blood cell that acts as agranular phagocytes. They can differentiate into macrophages and dendritic cells that help in phagocytizing pathogens or presenting antigens to T cells. Therefore, they match with description (b) Agranular phagocytes.

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Key Concepts

These are the key concepts you need to understand to accurately answer the question.

Immune System
The immune system is the body's defense network against harmful pathogens like bacteria, viruses, and parasites. This intricate system comprises various cells and tissues working collaboratively. It provides two types of immunity: innate and adaptive.

  • Innate Immunity: This is the first line of defense against invaders and includes physical barriers like skin and cells like neutrophils that attack pathogens immediately.
  • Adaptive Immunity: A more specialized response involving lymphocytes, which includes B cells and T cells, targeting specific pathogens.
A strong immune system is essential for health, ensuring our bodies fight infections effectively and prevent diseases.
Neutrophils
Neutrophils are the most plentiful type of white blood cells in the body. They play a pivotal role in the immune response due to their abundance and rapid action against infectious agents.

  • First Responders: They quickly arrive at infection sites, combating pathogens through phagocytosis, which means engulfing and digesting foreign particles.
  • Short-Lived: Neutrophils have a short lifespan, but their numbers rapidly increase in response to infections, particularly bacterial ones.
Their swift response and quantity make them crucial in the body's initial phase of fighting infections.
Eosinophils
Eosinophils are a unique type of white blood cell primarily active during allergic reactions and parasitic infections. They are identifiable by their granules that stain a specific color with eosin dye.

  • Allergy Response: During allergic reactions, eosinophils are released in increased numbers to counteract allergens in the body.
  • Parasitic Defense: These cells are also vital in defending against parasitic infections, binding to and killing parasite cells.
Their specialized role helps regulate allergic responses and offers protection against parasites.
Lymphocytes
Lymphocytes are a critical component of the adaptive immune response, specializing in targeting specific pathogens. They are mainly divided into B cells and T cells.

  • B Cells: Responsible for producing antibodies that neutralize pathogens.
  • T Cells: These come in different types, including Helper T cells that assist other immune cells and Cytotoxic T cells that destroy infected cells.
Together, these cells form the body's tailored defense mechanism, offering long-lasting immunity through memory of past infections.
Monocytes
Monocytes are large white blood cells that differentiate into macrophages and dendritic cells once they leave the bloodstream and enter tissues.

  • Agranular Phagocytes: Unlike other white blood cells, monocytes lack granules. They are important for engulfing and digesting pathogens and debris.
  • Differentiation: In tissues, they transform into macrophages, which help digest bacteria and dead cells, and dendritic cells, which present antigens to T cells.
Their ability to adapt and transform makes them versatile soldiers in the body's immune defense system.

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Most popular questions from this chapter

Large parasites, such as helminths, are most likely attacked by: (a) Basophils (b) Erythrocytes (c) Platelets (d) Neutrophils (e) Eosinophils

Match the following terms of inflammation to their descriptions: Pyrogen Chronic inflammation Leukocytosis Acute inflammation Edema Bradykinin (a) Small peptide released at injured site that is responsible for pain sensation. (b) Short-term inflammation that kills invading microbes, clears tissue debris, and repairs tissue injury (c) Fluid accumulation around injured cells causing swelling (d) Fever-causing substance (e) Long-term inflammation that attempts to destroy and/or confine the region of inflammation (f) Damaged cells release cytokines that trigger the production and infiltration of leukocytes to the inflammation site

Interferon was at first thought to be the viral magic bullet; however, it has been found to have which of the following drawbacks? (a) In most cases, administration of interferon is only a treatment and not a cure of viral diseases such as genital warts and cancer. (b) Recombinant interferon can be made in large quantities and is relatively cheap. (c) Recombinant interferon is unstable and does not remain long in the body and some microbes have developed resistance to it. (d) Injection of interferon can produce side effects including fever and organ toxicity. (e) a, c, and d.

Gummas, lepromas, and tubercules are all examples of pockets of tissue that surround and wall off areas of infection and inflammation that are called: (a) Peyer's patches (b) Phagolysosomes (c) Granulomas (d) Phagosomes (e) All of these, depending on the tissue involved

Put the following events of the acute phase response in order: (a) _ The acute phase proteins can now activate the complement system and immune cytolysis and stimulate phagocyte chemotaxis. (b) C-reactive protein recognizes and binds to phospholipids and mannose- binding protein to mannose sugars, in cell membranes of many bacteria and the plasma membrane of fungi. (c) Interleukin-6 reaches the liver via the bloodstream where it causes the liver to synthesize and secrete the acute phase proteins (C-reactive and mannose-binding proteins) into the blood. (d) _nce bound, the acute phase proteins act like opsonins. (e) Macrophage ingestion of microbe stimulates synthesis and secretion of interleukin-6.

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