Which statement about vaccines is true? - Ans: Vaccines require booster injections to maintain lifelong protection.
Exp: In general, vaccine-induced
... [Show More] protection does not persist as long as infection-induced immunity, thus booster injections may be necessary to maintain protection throughout life.
Which statement is true about fungal infections? -
What is the role of reverse transcriptase in HIV infection? - RNA to double stranded DNA An enzyme (protein) that's part of the human immunodeficiency virus reads the sequence of viral RNA nucleic acids (yellow in graphic) that have entered the host cell and transcribes the sequence into a complementary DNA sequence (shown in blue). That enzyme is called "reverse transcriptase" .
What of the following remains a significant cause of morbidity and mortality worldwide? (Points : 2) - Ans: Infectious disease
Exp: Despite the wide scale implementation of progressive public health and immunization policies infectious disease remains a significant cause of morbidity and mortality.
Once they have penetrated the first line of defense, which microorganisms do neutrophils actively attack, engulf, and destroy by phagocytosis? - Ans: Bacteria
Exp: Invasion results in direct confrontation with an individual's primary defense mechanisms against bacteria, which include the complement system, antibodies, and phagocytes, such as neutrophils and macrophages.
After sexual transmission of HIV, a person can be infected yet seronegative for _____ months. -
Deficiencies in which element can produce depression of both B- and T-cell function? -
Hypersensitivity is best defined as a(n) -
A person with type O blood is likely to have high titers of anti-___ antibodies. -
What mechanism occurs in Raynaud phenomenon that classifies it as a type III hypersensitivity reaction? -
During an IgE-mediated hypersensitivity reaction, what causes bronchospasm? -
In a type II hypersensitivity reaction, when soluble antigens from infectious agents enter circulation, tissue damage is a result of (Points : 2) -
In which primary immune deficiency is there a partial to complete absence of T-cell immunity? -
Which cytokines initiate the production of corticotropin-releasing hormone (CRH)? -
What effect does estrogen have on lymphocytes? -
Which hormone increases the formation of glucose from amino -
During a stress response, increased anxiety, vigilance, and arousal is prompted by - [Show Less]