The immune response fights infection because it produces:
A) lymphocytes that attack phagocytes.
B) antigens and antibodies that balance the system.
C) antigens and antibodies that work together.
D) antibodies that attack antigens.
ANS: D
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When using heart rate monitors to determine exercise intensity in a high school physical education class, which of the following would be the correct application of the heart rate data?
A. Heart rates between 80 and 100 are considered moderate intensity; >115 would be considered vigorous intensity. B. Heart rates between 100 and 120 are considered moderate intensity; >120 would be considered vigorous intensity. C. Heart rates between 110 and 130 are considered moderate intensity; >130 would be considered vigorous intensity. D. Heart rates between 130 and 140 are considered moderate intensity; >140 would be considered vigorous intensity.
Rules should be established according to which of the following guidelines?
A. The teacher should not spend time enforcing rules. B. The teacher should take time out to teach rules. C. The teacher should establish a system for students to enforce rules. D. The teacher should have a rule a day.
An estrogen receptor assay is BEST described as a test for:
a. Presence of carcinoembryonic antigen in the blood b. Level of human chorionic gonadotropin in serum c. Presence of a protein antigen in serum of patients with liver or testicular cancer d. Concentration of hormone receptor sites in cells of patients with breast cancer e. Amount of carcinogenic hormones in the bloodstream of patients with cancer
Which of the following fingernail deformities results from thyroid problems?
A. Clubbing B. Scaling C. Spooning D. Ridging