Hemoglobin consists of four heme polypeptide chains and four iron-containing globin groups.

Indicate whether the statement is true or false.


Ans: False

Health & Biomechanics

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When a B cell encounters its corresponding antigen, it expresses more ________ in order to be a

more effective antigen presenting cell. A) IL-7 receptor B) IgD C) MHC Class I D) IgM E) MHC Class II

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HIV gp 120 binds to CD4 on

a. T cells b. macrophages c. dendritic cells d. A and C e. all of the above

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The pharyngeal tonsils are the ________.

Fill in the blank(s) with the appropriate word(s).

Health & Biomechanics

Positive self-esteem is important to health because

A. people with high self-esteem experience less adversity. B. it increases intelligence. C. people are then more likely to take responsibility for their health. D. it increases health knowledge.

Health & Biomechanics