Select the correct answer. which numbers in the image represent the parts of the heart used to pump blood to the lungs? a. 5, 6, 7 b. 1, 4, 7 c. 2, 3, 4 d. 4, 5, 6

Viruses use the host's machinery to make copies of themselves. however, some human viruses require a type of replication that humans do not normally have. for example, humans normally do not have the ability to convert rna into dna. how can these types of viruses infect humans, when human cells cannot perform a particular role that the virus requires? a) the virus causes mutations in the human cells, resulting in the formation of new enzymes that are capable of performing these roles. b) the viral genome codes for specialized enzymes not in the host. c) the virus infects only those cells and species that can perform all the replication roles necessary. d) viruses can stay in a quiescent state until the host cell evolves this ability.

Active immunity refers to: a. the defenses people are born with. b. temporary immunity granted from another source. c. immunity gained through immunization and exposure to diseases. d. natural immunities that protect humans from other animal diseases

The post-exposure exam follow-up must include counseling about the possible implications of the exposure and your infection status, including the results and interpretation of all tests and how to protect personal contacts. the follow-up must also include evaluation of reported illnesses that may be related to the exposure. what else should you be provided with?