Test 2 Flashcards
What causes hypochromic RBCs?
When they lose hemoglobin content.
What do phospholipases do in the arachidonic pathway?
They are catalysts in the creation of arachidonic acid.
What is malaria?
A protozoan infection spread by mosquito vectors that reproduces in hepatocytes, which is then released into the blood causing hemolysis.
Which immunity exists when there is transfer of antibodies from mom to baby via the placenta or breast milk?
Natural passive acquired immunity.
What does immunoglobulin E do?
It binds to mast cells and basophils to be involved in parasitic infections and allergic reactions.
What type of immunodeficiency is x-linked hypogammaglobulinemia?
Congenital, humoral immunodeficiency.
What is the average level of CD4 in the human body?
600-1500.
What are two expected lab results in someone with macrocytic anemia?
RBCs <4 million, and MCV >95.
What are the two primary ways antibodies defeat microbes?
Neutralization and opsonization.
What are four signs and symptoms associated with diphtheria?
Sore throat, pyrexia, and a pseudomembrane across the tonsils or throat.
When do the signs and symptoms of shock begin to appear?
When systolic hypotension is near 80 or 90.
What is Karposi’s sarcoma?
A type of malignant skin tumor that invades immunocompromised people.
What creates antibodies?
B-cells after they differentiate into plasma cells.
What are two expected lab results in someone with normocytic anemia?
RBCs <4 million, and MCV 80-95.
What is giardiasis?
A parasitic/protozoan GI infection that impairs fat absorption, causing greasy, frothy, foul-smelling, non-bloody diarrhea (along with pyrexia and dehydration).
What is a rare condition in which there is slow development of hyper-proliferation of bone marrow stem cells?
Primary polycythemia.
What is the condition that “coats” bacteria, promoting phagocytosis by optimizing recognition and “digestibility” of antigen for phagocytes known as?
Opsonization.
What are the two proteins on the viral envelope of influenza?
Neuraminidase and hemagglutinin.
What are five signs and symptoms associated with rubeola?
Dense, red maculopapular rash that starts on the head before traveling downwards, pyrexia, cough, rhinorrhea, and conjunctivitis.
What is the percentage of RBCs in the blood called?
Hematocrit.
People with type A blood have which kind of antigens?
They have “anti-B” immunoglobulins.
What is a protozoan infection spread by mosquito vectors that reproduces in hepatocytes, which is then released into the blood causing hemolysis known as?
Malaria.
What occurs when there is a known or suspected infection and the person is suffering from SIRS?
Sepsis or septicemia.
What is the birth pathway for prostaglandins?
The arachidonic pathway.
What are two stressors that can breach the first line defenses of the respiratory system?
Cigarette smoking (destroys cilia), and cough reflex suppression (from head injury or stroke).
What stimulates the coughing reflex?
When a foreign body reaches the carina via inhalation.
What is an arterial or venous clot attached to a vessel wall?
A thrombus.
What is an abnormality in one or more branches of the immune system that renders a person susceptible to diseases normally prevented by an intact immune system?
An immunodeficiency.
What does immunoglobulin M do?
It activates complement and is the first antibody in immune responses.
What allowed herpes varicella to spread?
Direct inhalation of virus from an infected person’s exhaling, sneezing, or coughing.
What are several signs and symptoms seen in patients with normocytic anemia?
Fatigue, asthenia, dull mentation, and sometimes SOB.
What is an autoimmune disease that dries up all lubricating fluids in the body?
Sjogren’s syndrome.
What is cellulitis?
An infection and inflammation of either the dermis or subcutaneous tissue.
What type of cell releases leukotrines, histamine, and prostaglandins?
Mast cells.
What is a collection of blood under skin greater than one centimeter in size from frank bleeding?
Ecchymosis.
What are the main signs, symptoms, and complications in patients with mumps?
Swelling, pyrexia, and possible infertility in males.
What is the normal count of WBCs in the body?
6,000 to 10,000.
What does M-CSF do?
It promotes growth and maturation of mononuclear phagocytes.
What is a granuloma?
A hunt of tissue that has been chronically inflamed and is now essentially just scar tissue.
What is an autoimmune disease that causes IgG to attack platelets, leading to thrombocytopenia?
Idiopathic thrombocytopenia purpura (ITP).
What is another name for lockjaw?
Trismus.
What type of immunodeficiency is DiGeorge’s syndrome?
Congenital, cell-mediated immunodeficiency.
What is the main sign or symptom that results from thrombocytosis?
Hypercoagulation.
What is an anemia in which the size (MCV) is smaller than normal, so CBC would show RBCs of <4 million and MCV of < 80 known as?
Microcytic anemia.
What is the most common microbe that causes otitis media?
Resistant Streptococcus pneumoniae.
Is type I diabetes mellitus considered a tissue-specific or systemic autoimmune disease?
Type I DM is a tissue-specific autoimmune disease.
What are the major “players” in the immune response?
B and T lymphocytes in addition to other lymphatic tissues.
People with type o blood have which kind of antigens?
They have “anti-A” and “anti-B” immunoglobulins.
What is sometimes another name for microcytic anemia?
Iron deficiency anemia.
What are two first line defenses our eyes have?
Tears and eyelashes.
What does immunoglobulin D do?
It is needed for B cell maturation.
What is another name for measles?
Rubeola.
What are several signs associated with whooping cough?
Violent coughing fits, possible malnutrition, and highly contagious.
What is an arterial or venous thrombus that has broken loose and travels in the circulatory system?
An embolus.
What type of immunodeficiency is SCIDS?
Congenital, combined B-cell & T-cell immunodeficiency.
What condition occurs when a normal systemic inflammatory response goes into overdrive the normal “braking” system of the inflammatory process does not occur?
Systemic inflammatory response syndrome.
What is von Willebrand disease?
An inherited disorder that causes mostly mild clotting deficiencies with mild incidences of “easy bleeding”.
How do the pain levels vary in someone with rheumatoid arthritis?
Pain tends to be worse in the morning and lessens as the day goes on (opposite of osteoarthritis).
What are six signs and symptoms that may been seen in people with SLE?
Malar (“butterfly”) rash, nonerosive arthritis, serositis, proteinuria, seizures, and fatigue.
What are two types of compatibility issues seen in humans?
Histocompatibility and ABO/Rh compatibility.
Is autoimmune hemolytic anemia considered a tissue-specific or systemic autoimmune disease?
Autoimmune hemolytic anemia is a tissue-specific disease.
What cells make up the immunocyte response?
B-cells and T-cells.
What is a disorder in which there are more than normal number of total circulating RBCs?
Polycythemia or erythrocytosis.
What is infectious diarrhea called when it is bloody and severe?
Dysentery.
What are two common infections that resistant to beta-lactam drugs?
MRSA, and resistant Staphylococcus pneumoniae.
To what do antibodies become attached to form immune complexes in systemic lupus erythematosus?
They combine with DNA.
What does SIRS stand for?
System inflammatory response syndrome.
What is the body’s second line of resistance?
Inflammation that is immediate and non-specific.
What are several stressors that can breach the GU system’s first line of defense?
Oliguria (from renal failure/lithiasis), or anything that changes vaginal acidity (like douching).
What are three expected lab results to be seen in microcytic anemia?
RBCs <4 million, MCV <42%, and Hgb <14 gm/L.
How does resolution differ from the convalescent period?
Resolution is total elimination of a pathogen without any remaining symptoms.
What is the treatment for primary polycythemia?
Removal of 300-500 mL of blood three to four times monthly.
Why is the second line of defense important in a skin laceration?
Because inflammation causes the process of clot formation to begin, stopping the bleeding.
What do autoantibodies bind to in people with rheumatoid arthritis?
They form immune complexes with collagen.
How does the Clostridium botulinum toxin exert its effects?
By blocking acetylcholine in the nerve synapses of muscle receptor cells.
What are two examples of drugs to which bacteria have developed resistance?
Beta lactam antibiotics, and vancomycin.
What does GM-CSF do?
It promotes neutrophil, eosinophil, and monocyte maturationg and growth, and activates mature granulocytes.
What is impetigo?
An eruption of blisters usually around nose and mouth that are itchy, crusty, and contagious when cellulitis follows a milder staph infection of the skin.
Which immunocyte defends the body by direct attack against invading microbes?
T-lymphocytes.
Why are steroids the strongest and best antiinflammatories?
Because they affect the early stages of the arachidonic pathway, thus blocking both prostaglandins and leukotrienes.
What are pinpoint red spots that do not blanch under the skin from frank bleeding?
Petechiae.
What is a fulminating illness?
One with an abrupt onset with little or no prodrome.
What is the key criterion for categorizing someone as having passive acquired immunity?
That they have been given someone else’s antibodies; they did not develop the antibodies on their own.
What is polycythemia vera?
A rare condition in which there is slow development of hyper-proliferation of bone marrow stem cells.
Which two organisms are known to house the Salmonella genus?
Cows and chickens normally house it in their guts.
What are two common causes of normocytic anemia?
Rapid blood loss, or chronic disease that slows RBC production (like AIDS, lupus, or chronic renal failure).
What two lab results are required for a diagnosis of polycythemia?
RBCs > 6 million, and hematocrit > 52%.
Which type of cancer is one of the hematopoietic system where there is uncontrolled proliferation of leukocytes, causing over-crowding of bone marrow and decreased production of normal hematopoietic cells?
Leukemia.
What are common signs and symptoms associated with viral diarrhea?
Emesis and watery diarrhea.
What is the most serious complication associated with measles?
Encephalitis.
What are some expected lab results in a person with systemic lupus erythematosus?
High CRP, and high ANA.
What are six signs and symptoms associated with tetanus?
Anxiety, agitation, confusion, seizures, dysphagia, and dysdipsia.