What does agglutination by antibodies directly refer to?

1.activation of the complement system

2.use of cytokines to recruit the leukocytes to a location

3.leakiness in blood vessels for allowing leukocytes through

4.phagocytosis by macrophages

5.the clumping/sticking of pathogens together

6.neutralizing pathogens from working

Rotation of the head is made in atlanto-occipital joint or not?

Which of the following statements about the societal costs of tobacco use is true? a. tobacco use affects the tax rate of only those individuals who smoke. b. the negative effects of tobacco use are only experienced by the smoker. c. tobacco users contribute to an overall loss of productivity. d. increased healthcare costs are mainly absorbed by tobacco users

Which food should you stay away from to treat anemia