A positive tuberculin skin test (a delayed hypersensitivity reaction) indicates that
a. a humoral immune response has occurred
b. a cell-mediated immune response has occurred
c. both the T and B cell systems are functional
d. only the B cell system is functional
b. a cell-mediated immune response has occurred
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Which among these secretes a natural antiviral defense?
1. Ciliated respiratory tract cells 2. Alveolar macrophages 3. Respiratory epithelial cells 4. Cervical lymph nodes
Alcohol is involved in more than half of all fatal automobile accidents in the US.
Answer the following statement true (T) or false (F)
In the context of fitness, good ________ may be viewed as having sufficient energy and vitality to accomplish daily living tasks and leisure-time physical activities without undue fatigue.
Fill in the blank(s) with the appropriate word(s).
Which type of training is performed with body weights, rubber tubing, machines, and free weights?
A. static B. isokinetic C. isometric D. isotonic