12. Match the different types of muscles with their definition. a. contract rapidly but fatigue quickly as well
b. muscles in the heart
c. muscles that line the organs such as the stomach and bladder which are involuntary
d. richer in blood supply and use oxygen to help release energy
e. voluntary - the only muscles we have control over

1.slow muscle fibers
2.skeletal muscles
3.smooth muscles
4.cardiac muscles
5.fast muscle fibers

How will health most likely be affected if you follow the recommended guidelines for sleep rest and physical activity

Which of these contraceptive methods would be most beneficial for a female who wishes to avoid side effects or surgery?

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.