An antigen is ________, whereas an antibody is ________.
A. only on a pathogen; only in a human body
B. an immunoglobulin that is produced by lymph nodes in response to bacteria; a foreign protein that enters the body and causes an immune reaction
C. a hapten molecule that is complex in shape; an enzyme produced by the thymus gland that neutralizes antigens
D. a foreign substance such as a protein or a polysaccharide to which lymphocytes respond; a globular protein that reacts with an antigen to eliminate the antigen
Answer: D
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Fertilization typically occurs in the _________, and it restores the _________ number of chromosomes
A. ampulla of the uterine tube; haploid B. ampulla of the uterine tube; diploid C. body of the uterus; polyploid D. isthmus of the uterine tube; haploid E. isthmus of the uterine tube; polyploid
A large amount of antifreeze is necessary to be toxic to pets
Indicate whether the statement is true or false
Which type of burn usually requires skin grafting? Why?
A) First-degree burns because the epidermis is damaged. B) First-degree burns because the tissue damage is so great that the tissue cannot repair itself. C) Second-degree burns because the tissue damage is so great that the tissue cannot repair itself. D) Third-degree burns because the epidermis is damaged. E) Third-degree burns because the tissue damage is so great that the tissue cannot repair itself.
Antibodies and complement can work together, linking innate and adaptive immunity.
Answer the following statement true (T) or false (F)