Which of the following organs contains large amounts of lymphocytes and macrophages?
A. pancreas
B. spleen
C. tonsils
D. appendix
E. small intestines
B. spleen
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This specialized structure stores pigments, water, inorganic ions and maintains turgor pressure.
A. Golgi apparatus B. vacuole C. peroxisomes D. vesicles E. lysosomes
Neutralizing antibodies are those that function by:
a. attaching to the surface of pathogens and contributing to their destruction by the lytic action of complement. b. binding to and blocking surface receptors for host cells. c. attaching to the surface of pathogens and making the pathogens more amenable to ingestion by phagocytic cells. d. attaching to the surface of pathogens and contributing to their destruction by che-motaxis.
________ membranes allow some molecules to pass but not others.
A. Selectively permeable B. Inverted monolayer C. Impermeable D. Permeable
What substance accumulates in the blood of people with galactosemia?
A. Galactose B. Glucose C. Lactose D. Galactose-1-phosphate E. UDP galactose