In the human circulatory system, arteries carry blood away from the heart to different parts of the body. Veins carry blood from different parts of the body back to the heart. A scientist claims that the greater the amount of exercise a person performs, the greater the amount of oxygen (O2) the body uses. He records the oxygen concentration in the blood of people while they are riding an exercise bike. The graphs show the results of this investigation.a. Identify at least two systems within the human body that work together during exercise.

b. Explain how the evidence from the data in the graphs supports or does not support the scientist’s claim.

Answers

Answer 1

Answer:

Respiratory and circulatory systems are the two systems within the human body that work together during exercise.

How does the respiratory and circulatory systems work together during exercise?

The respiratory system:

allows the exchange of gases intake of oxygen and exhalation of carbon-dioxide.
oxygenation of blood at the lungs.

The circulatory system:

transports deoxygenated blood to the lungs for oxygenation.
delivers oxygenated blood to the appropriate tissue.
Hence, during exercise more oxygen is used by the body.

The claim by scientist is true?

During exercise:

breathing rate increases from about 15 times per minute to roughly 40–60 times per minute.
heart rate also rises, providing more oxygen to reach your muscles and allowing them to continue moving.

To learn more about respiratory system, circulatory system, blood, exercise, and oxygen here,

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Answer 2

Answer:

Answer:

There are many different systems involved in when we exercise, the three main ones are the Respiratory system which is involved in breathing the circulatory system which is about circulation of blood around the body and finally the muscular system and finally the Muscular system which is about how we move.

Explanation:

If the data consistently do not support the hypothesis, then CLEARLY, the hypothesis is NOT a reasonable explanation of what you are investigating. The hypothesis is rejected, and we search for a new interpretation, an new hypothesis that supports the experimental data

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You notice that heat is released during a chemical reaction. This reaction is a(n) _______ reaction. endothermic heat hot exothermic

Answers

The reaction is an exothermic reaction.

The total rate of energy use in the United States is now such that each person has the equivalent of about ___ horsepower working continuously.98.3 QBtu/year
29 million people in the U.S.
Horsepower= 746 W

The above is the info you will need. This is what I have done so far, but it can NOT be right:
98.3*10^15Btu/year(1 year/365 days) = 0.269315*10^15 Btu/day (0.269315*10^15Btu/day)/291 million = (0.2693*10^15 Btu/day)/291*10^6 ~0.00092548109*10^5 Btu/day = 925,481.09Btu/day
925,481.09Btu/day*(1day/24hour) = 38561.71 Btu/hour ~ 38561.7Btu/hour
1horsepower = 746 W
1 W = 3.412Btu/hr38561.7Btu/hr*(1 W/3.412 Btu/hr) ~ 11301.3 W*(1 hp/746 W) = 15.149 hp

Answers

The more I have worked on this, the stranger it has become.
First ... I didn't know what 'QBTU' means. But I see that you called it
' 10¹⁵ ' so I guess it's 'quadrillion'.
Next ... your given data says 29 million people in the US, and that's
ridiculous. Right now it's about 319 million. It was 290 million in 2002,
and I see that you used 291 million, so that looks like it was a typo.
No problem.

Now . . . I did it 3 or 4 times using that 3.412 BTU/hr = 1 watt . I did get
the significant figures of 152, but I kept getting either 152 HP or 0.152 HP.

At this point, I traced through your solution ... thank you very much for
posting it ... and I'm going to take your colossal load of points for saying
that I I did go through every step in detail, I agree 100% with everything
I see there, and I endorse every move you made.

So up to now, we both agree that we cannot see where 1.5 HP/person
comes from.

I looked back to the conversion factors, and I saw something that could
make the arithmetic less complex: 1 BTU = 1,055 Joules
Look what I can do with that:

   (98.3 x 10¹⁵ BTU/yr) x (1,055 joule/BTU) x
   (yr/365 day) x (day/86,400sec) x
   (HP/746 joule-sec) = 4.4082 x 10⁹ HP

then . . .

(4.4082 x 10⁹ HP) / (29.1 x 10⁷ people) = 15.15 HP/person

I'd say that your work, using the given data, has been vindicated by
an outside, independent consultant. It may not be a true statistic, but
your math is bullet-proof, and the data have been properly implemented.

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Answers

Explanation:

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Secondly, the wire can create friction against your skin. As you carry the bag and walk, the movement can cause the wire to rub against your hand, resulting in irritation and potentially even blisters. This friction can also cause the wire to dig deeper into your skin, intensifying the pain.

Lastly, the weight distribution of the bag can be affected by the presence of the wire. When you carry a heavy bag, it is ideal for the weight to be evenly distributed to minimize strain on specific areas of your body. However, the wire can create an uneven distribution of weight within the bag. This can lead to increased pressure and discomfort on certain parts of your hand, making it more painful to carry the bag.

In summary, carrying a heavy bag with a string of wire can hurt more due to the additional pressure and strain on your hand, the friction caused by the wire rubbing against your skin, and the uneven weight distribution within the bag. It is important to consider these factors when carrying heavy objects to minimize discomfort and potential injury.

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Answers

The name of the Scientist that showed Copernicus theory of a moving earth reasonable was Galileo. Hope this helps you.

The scientist was Galileo Galelei

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