In a study of a disease in which all cases that developed were ascertained, if the relative risk for the association between a factor and the disease is equal to or less than 1.0, then: a. there is no association between the factor and the diseaseb. the factor protects against development of the diseasec. either matching or randomization has been unsuccessfuld. the comparison group used was unsuitable, and a valid comparison is not possiblee. there is either no association or a negative association between the factor and the disease

How is the structure of our circulatory system and respiratory system related to the function of both these systems?

If something is painful during exercise, what should you do? a. back off the exercise. b. modify the exercise. c. consult a physician if the pain persists. d. all of the above

For years, tobacco products have included a message from the surgeon general warning the negative effects of tobacco use. at this time, a push is being made for the fda to begin to regulate e-cigarettes in order to mandate warning labels and age restrictions. write a paragraph that identifies 2 health problems that have been linked to nicotine and/or tobacco use. you should include statistics demonstrating the incidence of problems among smokers and provide a resource citing where you found the information provided. (remember from unit 1 what makes a resource reliable.) due in 2