Question

Which of the following describes the most likely impact that exposure to pollutants in the atmosphere would have on one’s personal health?

It would trigger cell-mediated immune responses.

It would lead to upper respiratory infections and pneumonia.

It would increase the release of histamine by plasma cells.

It would decrease one’s ability to produce antibodies.

Answer 1

it's B.

Answer 2

thanks can u help me with a couple others?

Answer 3

yes ma'am

Answer 4

An elderly woman finds that her back hurts almost all the time. Her doctor tells her it is because she has osteoporosis. Why might a disease that causes her bones to thin make her back hurt?

The bones of her vertebrae have lost calcium and crumbled enough to begin pinching the nerves leaving her spinal cord.

Nerves in the muscles in her back are slowly destroyed as the bones of her vertebrae get thinner and collapse.

The sensory neurons inside the bones of her vertebrae send pain messages to her brain as the bone dissolves.

Her thinner bones cannot support her skin and muscles adequately, and so the muscles cramp and hurt.

Answer 5

A.

Answer 6

Rabies is a deadly disease that progresses rapidly. What type of treatment would be best for a person who has not been vaccinated for rabies and has been bitten by a raccoon with rabies?

The person should be given vitamins and advised to exercise to boost the immune system.

The person should be isolated to see if they develop the symptoms of rabies.

The person should be injected with antibodies from a rabies-vaccinated person right away.

The person should be vaccinated for rabies immediately so that an immunity will develop.

Answer 7

A researcher is designing an experiment to determine whether the production of amylase increases when a person anticipates eating starchy food. She measures the amount of amylase in the saliva of 10 volunteers who are offered a bowl of pasta and of 10 other volunteers who are offered a bowl of scrambled eggs. In analyzing her data, she finds some variation in the amount of amylase among the samples within each group, but no significant difference in the amount of amylase between the two groups. She concludes that she needs to revise her experimental design and try her experiment again. What would be the best thing she could do to improve her experiment?

Add at least 30 more volunteers to the group presented with bowls of pasta and keep the number of volunteers in the scrambled egg group the same.

Measure the amount of amylase produced at the sight of a cracker by each volunteer who has just eaten a bowl of pasta.

Test the variation in the amount of amylase produced by each individual before and after being presented with a bowl of pasta.

Allow one group of volunteers to smell a bowl of pasta while the other group only thinks about it and then test the amount of amylase produced by the two groups.