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Ksju [112]
3 years ago
6

The Global Youth Tobacco Survey asks youth to fill in the answers to several questions about their tobacco use. In this survey c

onducted between 2000 and 2007, it was found that in youth ages 13-15, 12 percent of boys and 7 percent of girls reported smoking cigarettes. This information was shared and reported on the American Cancer Society website. The information was then used by several industries in the fields of health care, insurance, and education. What is a reason that these data may be unreliable? It is information that is too old to be considered factual. It was found on the American Cancer Society website, and websites are unreliable. It is information that is used for a variety of purposes and not just gathered for research. It is from a self-reporting survey, and teens may not want to answer the questions honestly
Biology
1 answer:
seropon [69]3 years ago
4 0

Answer:

It is from a self-reporting survey, and teens may not want to answer the questions honestly

Explanation:

Although surveys provide a useful initial point to start an investigation, this type of information may be unreliable when the research methods used have not been rigorous enough. The main disadvantages of the surveys are as follow:

1-Participants may not feel comfortable to answer accurately at the time.

2-Participants may not have felt comfortable to provide answers that exhibit themselves in an unfavorable way.

3-Participants may not have totally aware of the reasons or the importance of their answers (which may be due to the lack of memory, boredom, etc).

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2 years ago
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Answer and Explanation:

The steps of the sliding filament theory are:

Muscle activation: breakdown of energy (ATP) by myosin.

Before contraction begins, myosin is only associated with a molecule of energy (ATP), which myosin breaks down into its component molecules (ADP + P) causing myosin to change shape.

Muscle contraction: cross-bridge formation

The shape change allows myosin to bind an adjacent actin, creating a cross-bridge.

Recharging: power (pulling) stroke

The cross-bridge formation causes myosin to release ADP+P, change shape, and to pull (slide) actin closer to the center of the myosin molecule.

Relaxaction: cross-bridge detachment

The completion of the pulling stroke further changes the shape of myosin. This allows myosin and ATP to bind, which causes myosin to release actin, destroying the cross-bridge. The cycle is now ready to begin again.

The repeated cycling through these steps generates force (i.e., step 2: cross-bridge formation) and changes in muscle length (i.e., step 3: power stroke), which are necessary to muscle contraction.

7 0
3 years ago
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Furkat [3]

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Hope that helps.

5 0
3 years ago
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ioda

Answer:

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Explanation:

Hope this helps.

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