AnswersFL-2000310-Biology 1Unit Test

Unit Test — Unit test Answers

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Which best describes the brain stem?

A
The brain stem is found in the midbrain.
B
The brain stem controls critical thinking.
C
The brain stem controls blood circulation.
D
The brain stem regulates the release of hormones.
2
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In 2011, the number of transplants in the United States was 26,745, and the number of donors was 14,146. What is most likely the reason that there were more transplants than donors?

A
The data that were used for comparison was not compatible.
B
The data were not recorded accurately.
C
There were retransplants done.
D
Each donor gave away more than one organ.
3

A commercial on television advertises a new medicine that claims to boost immunity. You want to verify that the claim is scientifically based. Which source is least likely to provide you with accurate information about this new medicine?

A
a magazine about entertainment and lifestyle trends
B
the studies that the television ad cites
C
a brochure from the doctor’s office
D
the website of the governmental agency that tests health products
4

Kaya had an organ transplant. She went to the doctor a week later, and the doctor did a blood test. Her lymphocyte count had increased. She went to the doctor a month later for the same test, and her lymphocyte count was higher. What is the best explanation as to why her lymphocyte levels were increasing?

A
Kaya was given antibiotics to prevent infections.
B
Kaya’s antigens were attacking the tissue.
C
Kaya was not tissue typed prior to her surgery, and her body is mounting an immune response.
D
Kaya took her immunosuppressant drugs weekly, which increased her lymphocyte count.
5

Xenotransplantation is using nonhuman animal organs in transplantation. Many people are against this practice. What would be the best argument for why xenotransplantation should be accepted?

A
There are more people on transplantation lists than donor organs so xenotransplantation can save people’s lives
B
People on transplantation lists are not treated equally in that some are moved to the top of the list.
C
There are no antigens on the surface of nonhuman animals so there would be no rejection.
D
More organs can be extracted from nonhuman animals to accommodate more recipients.
6

Two patients were admitted to the hospital. Patient one was diagnosed with salmonella poisoning, and patient two had West Nile. Which best describes their sicknesses?

A
Patient one has a communicable disease and patient two has a noncommunicable disease.
B
Patient one has a noncommunicable disease and patient two has a communicable disease.
C
Patient one contracted the sickness from contaminated materials and patient two contracted the sickness from an animal vector.
D
Patient one contracted the sickness from an animal vector and patient two contracted the sickness from contaminated materials.
7

The picture represents a structure of the respiratory system.

Question illustration
A
to bring air into the body
B
to exchange oxygen with carbon dioxide
C
to carry air to the lungs
D
to release oxygen from the body
8

The picture represents gas exchange in the alveoli. Observe what is happening at location X.

Question illustration
A
It will move out of the body.
B
It will enter the blood.
C
It will be carried to cells.
D
It will undergo respiration.
9

The student body president is launching a campaign to fight the spread of flu in his school. Which of the following should he encourage students to do?

A
shower twice a day
B
drink plenty of fluids
C
eat healthy snacks
D
wash their hands regularly
10

Some people choose not to get vaccinated because they believe that vaccinations can cause disease. What would be the best evidence to oppose this argument?

A
Vaccines can suppress the immune system to allow for better organ transplants.
B
There is a greater chance of contracting dangerous diseases if you are not vaccinated.
C
The vaccines can help build immunity to many different pathogens.
D
Everyone is capable of receiving vaccines, so we should all do our part to eradicate disease.
11

Medical biologists are researching a fertility disorder that prevents developing offspring from forming the structures they need to maintain nourishment and continue development. Therefore, development ceases early during gestation. What is the final stage of development that these offspring could reach before development stops?

A
zygote
B
blastocyst
C
fetus
D
gametes
12

Along with Louis Pasteur, what other scientist helped to disprove spontaneous generation?

A
Eli Germ
B
John Snow
C
Francesco Redi
D
Robert Koch
13

Alzheimer's disease has some lifestyle factors because

A
everyone can contract it in their lifetime.
B
it can be influenced by nutritional choices.
C
up until now there is no known cure for it.
D
it can be contracted through germs.
14

Growth of chest hair, deepening of the voice, and muscle growth are secondary sex characteristics. Which structure or structures produce substances most likely to affect the development of these traits?

A
testes
B
ovaries
C
prostate gland
D
vulva
15

Which describes the function of the human sperm cell’s structure?

A
The nucleus contains all 46 chromosomes.
B
The tail allows it to travel to the egg.
C
The head contains a basic substance that counteracts acidic substances in the vagina.
D
The sperm’s structure allows it to live for two weeks in the vagina.

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