What cells decline in number during the final phase of HIV-1 infection, when an individual is said to have AIDS?
A) helper T (TH) cells B) B cells C) plasma cells D) memory B cells
Answer: A
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The centrifuge can determine the pH and SG of a liquid
Indicate whether the statement is true or false
Antibodies ________
A) each recognize several different antigens B) bind to an antigen and destroy it by phagocytosis C) provide for cellular immunity in the body D) are proteins composed of heavy chains and light chains
Some people suffer involuntary urination due to incompetence of what muscle?
A) External urethral sphincter B) Levator ani C) Compressor urethrae D) Bulbospongiosus E) Ischiocavernosus
The fuzzy coat of carbohydrates on the outer surface of the plasma membrane that functions in cell identification is called the ________
A) brush border B) cell-adhesion molecule C) glycocalyx D) phospholipid bilayer E) cholesterol coat