Describe the differences in function of the five immunoglobulin classes. What will be an ideal response?
Concepts to Consider: IgA--in mucus, tears, saliva, and milk; it prevents microorganisms from
attaching to epithelial surfaces; in respiratory passages, digestive, urinary, and reproductive tracts; it
fights against inhaled or ingested pathogens. IgD--in plasma, on B cell surface; activates B cells after
antigen binding. IgE--in plasma; binds to mast cells causing release of histamine; also aids in fight
against parasitic worms. IgG and IgM--in plasma; defends against bacteria, viruses, fungi; interacts
with macrophages and activates complement system.
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Biological growth involves an increase in:
a. the number of cells. b. the size of individual cells. c. the number of gene types in a cell. d. both the number and size of cells. e. both the number of cells and the number of gene types in a cell.
The miRNAs in a cell inhibit protein synthesis by forming complementary bonds with rRNA
Indicate whether the statement is true or false
Under the neutral model, allele frequency distributions are the product of:
a. effective population size. b. mutation rate. c. selection. d. A and B. e. None of the above.
Physiological temperature regulation that is typical of endotherms is impaired only by lesions in the
A. preoptic area B. brainstem C. medial hypothalamus D. dorsomedial thalamus