Directions:
• imagine you just went for a long run. you ended your run with a nice walk and are ready to stretch. you especially worked your legs.
• find exercises that will stretch the following muscles listed below.
• provide the information requested.
• review the stretches in the exercise library at the end of the course for with stretching technique.

1. hamstrings

name of exercise:

describe the action:

two technique recommendations:

2. quadriceps
name of exercise:

describe the action:

two technique recommendations:

3. calf (gastrocnemius)
name of exercise:

describe the action:

two technique recommendations:

4. hip flexors

name of exercise:

describe the action:

two technique recommendations:

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.

You isolate an infectious substance capable of causing disease in plants, but you do not know whether the infectious agent is a bacterium, virus, viroid, or prion. you have four methods at your disposal to analyze the substance and determine the nature of the infectious agent. i. treat the substance with enzymes that destroy all nucleic acids and then determine whether the substance is still infectious. ii. microscope. iii. culture the substance on nutritive medium, away from any plant cells. iv. treat the sample with proteases that digest all proteins and then determining whether the substance is still infectious. if you already know that the infectious agent was either bacterial or viral, which method(s) listed above would allow you to distinguish between these two possibilities? a) ib) iic) ii or iiid) iv

What’s the first step in handling stress? list eight strategies for managing stress. what are some physical symptoms of stress?