What is the name for a disease that involves high numbers of cases worldwide?
A) communicable
B) epidemic
C) pandemic
D) reportable
Answer: C) pandemic
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Which of the following statements regarding blood clotting is TRUE?
A. Blood clotting is enhanced by prostaglandin I2 (PGI2) and nitric oxide. B. Injecting tissue plasminogen activator (t-PA) into a patient who is bleeding will aid blood clotting. C. A blood clot is a network of interlacing strands of fibrinogen. D. Blood clotting requires activation of thrombin. E. Blood clotting occurs too rapidly in individuals with the disease hemophilia.
The same chemical messenger may be either a hormone or a neurotransmitter, depending on its source and mode of delivery to the target tissue
Indicate whether the statement is true or false
Which of the following is a contraceptive method that not only prevents fertilization but also provides protection against sexually transmitted diseases?
A. Oral contraceptives B. Diaphragm C. Spermicidal agents D. Condom
Enzymes are examples of ________ proteins
A) structural B) globular (functional) C) fibrous D) alpha