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115 Cards in this Set

  • Front
  • Back

What are the 2 types of intrensic systems?

Innate and adaptive

What is the innate intrinsic system?

Nonspecific defense system

What is the adaptive intrinsic system?

Specific defense system

What are the two lines of innate defense system?

1st external body membranes


2nd antimicrobial proteins phagocytes and other cells

What is the line of adaptive defense system?

3rd line of defense attacks particular foreign substances

What is keratin resistant to?

Weak acids and bases, bacterial enzymes, and toxins

When is internal defense necessary?

If microorganisms invade deeper tissues

What are types of internal defenses?

Phagocytes, natural killer cells, antimicrobial proteins, inflammatory response

What do cytoplasmic extensions bind and engulf?

Particles in vessels called phagosomes

What do macrophages develop from?

Monocytes

What are inflammatory mediators?

Kinins prostaglands and complement

What do helper t cells cause release of and what do they do?

Enzymes of respiratory burst which kill pathogens resistant to lysosomal enzymes

What are natural killer cells?

Nonphagolytic large granular lymphocyte that attack cells that lack self cell surface receptors and introduce apoptosis in cancer cells and virus infected cells

What are the cardinal signs of acute inflammation?

Redness, heat, swelling, pain, and sometimes function impairment

What do activated like receptors (TRLs) trigger the release of?

Cytokines that promote inflammation

What do clotting factors form?

Fibrin mesh

What leads and what follows?

Neutrophils lead and macrophages follow

True or false: If inflammation due to pathogens, complement activated; adaptive immunity elements arrive

True

What are the steps to phagocyte mobilization?

Leukocytosis, margination, diapedesis,chemotaxis

What do viral-infected cells secrete to warn neighboring cells

IFNs (alpha and beta)

What are the 3 pathways to activation?

Classical, lectin, and alternative

What is the classical pathway?

Antibodies bind to invading organisms and to complement and components... First step in activation. More specific to antigen/antibodies

What pass the end effect of complement activation?

Trigger inflammation


Attract phagocyte


Helps phagocyte attach


Lyse gram - bacteria


Activates b cells


Remove harmful stuff

What acts on body's thermostat in hypothalmus to raising body temp?

Pyrogens

What is the adaptive immune system?

Protects against infectious agents and abnormal body cells. Amplifies inflammatory response. Activates complement. Must be primed by initial exposure to specific foreign substances.

What are the types of adaptive defenses?

Specific (recognizes and targets specific antigens)


Systemic (not restricted to initial site)


Which immunity has extracellular targets?

Hummoral immunity

Which immunity has cellular targets?

Cellular immunity

What acts against target cells?

Lymphocytes

What are antigens?

Large complex molecules not normally found in the body. Targets if all adaptive immune responses

What is immunogenicity?

Ability to simulate proliferation of specific lymphocytes

What is reactivity?

Ability to react with activated lymphocytes and antibodies released by immunogenic reactions

What isa hapten?

Incomplete antigens

True or false: all parts of antigenic determinants of entire antigen are immunogenic.

False only some parts are

What are b cells?

Hummoral immunity

What are t cells?

Cellular immunity

What are the 5 general steps of lymphocyte development maturation and activation?

Origin, maturation, seeding secondary lymphoid organs and circulation, antigen encounter and activation, proliferation and differentiation

Where are b cells found?

Bone marrow

Where are t cells found?

Thymus

B and T cells nut they exposed tl antigen are called what?

Naive

What determines which foreign substances immune system recognize?

Genes

Where are dendritic cells found?

Connective tissues and eppidermis

Where are macrophages found?

Connective tissues and lymphoid organs

What is the most effective antigen presenter?

Dendritic cells

What is necessary to activate t cells?

Mhc protein

What are immunoglobulins?

Gamma globulin portionnof blood

What are immunoglobulins capae of binding with?

Antigens detected by B cells

What are the classes of immunoglobulins?

IgM IgA IgD IgG IgE

Explain IgM

Largest of Ig 1st antibody released and readily fixed and activates compliment.

Explain IgA

In Mucuos Abbas other secretions (breast milk) helps prevent entry of pathogens

Explain IgD

B cell receptor

Explain IgG

Monitors for past infections

Explain IgE

Antihistamine... Released during asthma attacks

What are the 2 most important defensive mechanisms?

Neutralization and agglutination

What do antibodies block?

Specific sites on viruses or bacterial exotoxins

What is agglutination

Antibodies bind same determinate on more than one cell bound antigen

What is precipitation

Soluble molecules are cross-linked

What are the two things T cells do

Some directly kill cells and others release chemicals that regulate immune response

What are the two populations of T cells based on

Which glycoprotein surface receptors are displayed

What do cd4 cells usually become

Helper T cells

What is 88 cells become

Cytotoxic T cells

What do cytotoxic T cells do

They destroy cells harboring foreign antigens and also can become memory T cells

What is crucial for cd8 cell activation

MHC proteins

What do cytotoxic cells ignore

Displayed self-antigens

What bands are fragments of proteins synthesized in the cell also known as an endogenous antigen

MHC proteins

What do dendritic cells do

Dangle dying virus infected or tumor cells or import intentions via temporary gap junctions with infected cells then displays of class and one in class to MHCs

What is the two step process for T cell activation

Antigen binding and co-stimulation

What does co-stimulation required T cells to bind to

Are there surface receptors on an APC

What is the benefit of apoptosis

Activated T cells are having produce large amount inflammatory cytokines hypoplasia and cancer

What are cytokines

Bayer chemical messengers of the immune system and mediate cell development differentiation and responses in the immune system

How can b cells be activated without Th cells

By binding to T cell independent antigens

What is it called when an antigen requires th co-stimulation to activate B cells

T cell-dependent antigens

What do helper T cells do

The amplifier response to innate immune systems activated macrophages which are more potent killers and mobilize lymphocytes and macrophages and attractive types of WBCs

What are targets of cytotoxic T cells

Virus infected cells cells with intracellular bacteria or parasites cancer cells and foreign cells

Explain cytotoxic T cells

They buy to self nonself complex and can destroy all infected or abnormal cells they're the only sell that can act indirectly

What are the four varieties of transplant

1 autographs from one body site to another in the same person


2 isograph between identical twins


3 allografts between individuals who are not identical twins


4 exam across from another animal species


What is immunosuppressive therapy

When a patient's immune system is suppressed

What are immunodeficiencies

Congenital or acquired conditions that impair function or production of immune cells or molecules such as compliment or antibodies

What is Hodgkin's disease

An acquired immunodeficiency cancer of the B cells that leads to immunodeficiency by depression in the lymph node self

What is AIDS

It is caused by the human immunodeficiency virus transmitted via body fluids blood semen and vaginal secretions it can enter the body through blood transfusions blood contaminated needles sexual intercourse oral sex or mother to fetus it destroys th cells and depresses cellular immunity

What are hypersensitivities

Their immune responses to perceived in otherwise harmless threat caused by tissue damage different types can be distinguished by their time course and whatever antibodies or T cells are involved

What can antibodies cause

Immediate and subacute hypersensitivities

What is an acute hypersensitivity

It's a hypersensitivity that begins in seconds after contact with the allergen

What happens during a hypersensitivity

I ge binds to myself and basophils in a flood of histamine releases and induces inflammatory response

What is anaphylactic shock

This is some response to an allergen that directly into the blood and circulates rapidly

What happens during anaphylactic shock

Constriction of bronchioles :-P well sudden vasodilation and fluid loss from blood stream may occur circulatory collapse and death

Explain delayed hypersensitivity

Cytokine activated macrophages and cytotoxic T cells cause damage agents act as haptens TB skin test depends on this reaction

What are the major organs of the respiratory system

Nose nasal cavity paranasal sinuses pharynx larynx trachea bronchi and their branches the lungs and the alveoli

What is pulmonary ventilation

The movement of air into and out of the lungs

What is external respiration

Oxygen and carbon dioxide exchange between lungs and blood

What is internal respiration

Oxygen and carbon dioxide exchange between systemic blood vessels and tissues

What is the respiratory zone

The site of gas exchange

What is the conducting zone

It conducts gas to exchange sites

What are the functions of the nose

Provides an airway for respiration license and warms entering air filters clean inspired air serves as a resonating chamber for speech in a house is the olfactory receptors

Where is the nasal vestibule

It is the nasal cavity superior to the nostrils

What are the functions of the nasal mucosa and conchae

During inhalation conchae and nasal mucosa filter heat and moisten air during acceleration they reclaim the heat in the washer

What are the three regions of the pharynx

Nasopharynx oropharynx and laryngopharynx

What is the pharynx

It is the muscular tube from the base of the skull to the c6 it connects the nasal cavity and the mouth to the larynx and esophagus

What are the parts of the oropharynx

The Isthmus of fauces opening to the oral cavity the palatine tonsils in thelateral walls of the fauces and lingual tonsils on posterior surface of the tongue

What is the laryngopharynx

A passageway for food and air posterior to the upright epiglottis in extenso larynx where continuous with the esophagus

What are the nine cartilages of the larynx

Thyroid cartilage with laryngeal prominence ring-shaped Cricut cartridge parent annoyed cuneiform & corniculate cartilages epiglottic vocal ligaments vestibular folds

What is involved in the control of respiration

The medulla and the pons

What is my powerful respiratory stimulant

Rising carbon dioxide levels

What is intrapulmonary pressure

Pressure in the alveoli

What is atelectasis

Lung collapse due to plug bronchioles collapse of alveoli pneumothorax air in the pleural cavity

What can cause lung collapse

If intrapleural pressure equals intrapulmonary pressure or atmospheric pressure

What causes transpulmonary pressure

If intrapulmonary pressure is less than intrapleural pressure

What is Boyle's law

Pressure varies inversely with volume

What are three physical factors influencing pulmonary ventilation

Airway resistance alveolus surface tension and lung compliance

What happens is every resistance rises

Breathing movements become more strenuous

What is surfactant

Detergent Lake lipid and protein complex produced by type 2 alveolar cells and reduces surface tension of a violar fluid and discourages alveolar collapse

What is the main source of resistance with external respiration

Friction

Which way to Cecilia move contaminated mucosa

Posteriorly to the throat

What did what depends on the force of air

Loudness

What is the adventitia

The outermost layer made of connective tissue and in case of the Rings of hyaline cartilage