BIOL 2402: Exam 3
The type of circulatory shock due to abnormal expansion of blood vessels and rapid drop in blood pressure is .
The term ductus venosus refers to .
a special fetal vessel that allows umbilical blood to by pass the liver
What does NOT involve tissue perfusion?
The velocity or blood flow is .
slowest in the capillaries because the total cross sectional area is the greatest
A patient with essential hypertension might have pressures of 200/120 mm Hg. This hypertensive state could NOT result in what?
decreased size of the heart muscle
What would NOT be classified as a lymphatic structure?
The thymus is most active during ?
Which lymphatic structure drains lymph from the right upper limb and the ride side of the head and thorax?
right lymphatic duct
Antibodies that act against a particular foreign substance are released by .
Lymph leaves a lymph node via .
efferent lymphatic vessels
What is associated with passive immunity?
passage of IgG antibodies from a pregnant mother to her fetus
What is not a type of T-cell?
B lymphocytes develop immunocompetence in the .
The process whereby neutrophils and other white blood cells are attracted to an inflammatory site is called .
What is the correct sequence of events in phagocytosis?
chemotaxis, adherence, ingestion, digestion, killing.
What is NOT a role of activated complement?
prevention of immediate hypersensitivity reactions.
interfere with viral replication within cells
What determines what specific foreign substances our adaptive immune system will be able to recognize and resist?
Regulatory T cells .
may function in preventing autoimmune reactions
isografts are between identical twins
What does NOT describe antigens?
antigens only come from microbes
B cells respond to the initial antigen challenge by .
producing progeny cells that include plasma cells and memory cells.
T-cell activation requires .
antigen binding and co-stimulation
production is regulated by chemicals that reset the body's thermostat to a higher setting.
What cell is the most critical cell in immunity?
helper T cell
What immunoglobulin class is attached to the external surface of B cells and acts as an antigen receptor of the B cell?
The antibody that becomes bound ti mast cells and basophils and causes the cells to release histamine and other chemicals is .