Unit 2 Chapter 21 Word Scramble

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Question	Answer
Which of the following statements is true about memory cells?	Memory cells respond to antigens more rapidly than naive T cells. The action of memory cells is the reason why we can get some diseases more than once.
The lymphoid system recovers fluids lost from the _____ to the _____	vasculature interstitium
The fluids are collected and recirculated into the ______ via diffusion.	cardiovascular system
One disease condition that exemplifies the ___ function of the lymphoid system is elephantiasis, which is caused by parasitic blockages of the lymphatic vessels, resulting in massive interstitial tissue edema.	fluid reclamation
Immune function occurs largely because lymph contains ____ and immunoglobulins, which serve as powerful defense mechanisms against pathogens.	leukocytes
Digestive function of the lymphatic system is provided by ___ , which are found in the small intestine and are involved in the process of __ absorption.	lacteals lipid
May defend against a kidney transplant	Natural killer cells
Natural killer cells	Dendritic cells
May ingest and destroy bacteria	Macrophages
Give rise to cells that secrete antibodies	B lymphocytes
The fluid contained inside the lymphatic vessels is referred to as ___	lymph
It is similar to _____ in consistency and appearance.	blood plasma
Originating distally in the tissues of the body, excess interstitial fluids are taken up by the _____ , which resemble ___	lymphatic vessels veins
Accumulations of lymphocytes embedded in connective tissue networks are called ___	lymphoid tissues
The tonsils, spleen, thymus, and lymph nodes are all examples of ____	lymphoid organs
Discharge enzymes into a cloud of bactericidal chemicals	Neutrophils
Guard against parasites and allergens	Eosinophils
Transform into phagocytic macrophages that ingest dead pathogens	Monocytes
Include NK cells, which patrol the body looking for diseased host cells	Lymphocytes
Secrete histamine, increasing blood flow	Basophils
Soluble plasma proteins, known as _____, can be activated in three ways. The classical mechanism requires antibodies.	complement
The alternative and ___ pathways of complement activation can both be initiated independent of antibody actions.	lectin
One way in which complement activation destroys pathogens is by C3a binding to ___ , which then causes inflammation through histamine and heparin release.	basophils and mast cells
By binding ___ to red blood cells, complement can serve as a promoter of__ by transporting these elements to reticular tissue for removal.	antibody-antigen complexes immune clearance
Activated C3b can also directly attach to pathogens and later serve as markers for ___ through a process called opsonization.	phagocytosis
Further cascades of reactions caused by C3b encourage the formation of membrane attack complexes in the membranes of pathogens, causing ___ .	cytolysis
A ___ is an abnormal elevation of the body temperature.	fever
A fever, when allowed to run its course, is actually __	beneficial
Fever can ______ interferon activity.	promote
Fever can also ___ tissue repair.	accelerate
Lastly, fever will prevent the __ of bacteria and viruses	reproduction
What are the lymphoid system's main functions?	Immune surveillance, absorption of lipids, fluid recovery
What are monocytes that migrate to the tissue and function as phagocytes called?	Macrophages
What are mucosa-associated lymphoid tissues?	Aggregates of lymphoid tissue scattered throughout the lamina propria of mucous membranes
Which primary lymphoid organ is the site of B cell maturation?	Red bone marrow
What is the body's largest lymphoid organ?	Spleen
What does the first line of defense against pathogens consist of?	External barriers
Which protein inhibits the viral infection of neighboring cells?	Interferon
Which cell phagocytizes an antigen and displays fragments of it on its surface?	Antigen-presenting cell
Which T cell plays an integral role in both humoral and cell-mediated immunity?	Helper T cell
A severe and immediate local IgE reaction to an allergen within seconds of exposure is called _________blank.	anaphylaxis

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