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Which of the following processes causes most of the carbon dioxide from the blood to move into the alveoli?

Conversion to carbon monoxide.

Diffusion down a concentration gradient.

Passive transport using carrier proteins.

Active transport using energy.

Answer and Explanation

The Correct Answer is B

Diffusion down a concentration gradient causes most of the carbon dioxide from the blood to move into the alveoli.

The alveoli are tiny air sacs in the lungs where gas exchange occurs.

Carbon dioxide is a waste product of cellular respiration and is carried by the blood to the lungs to be exhaled.

In the lungs, carbon dioxide diffuses from the blood (where its concentration is high) into the alveoli (where its concentration is lower) down its concentration gradient.

Choice A is incorrect because carbon dioxide is not converted to carbon monoxide in the body.

Choice C is incorrect because passive transport using carrier proteins is not the primary mechanism by which carbon dioxide moves from the blood into the alveoli.

Choice D is incorrect because active transport using energy is not involved in the movement of carbon dioxide from the blood into the alveoli.

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Correct Answer is C

Explanation

The data in the table shows that as the number of filters (and therefore the mass) increases, the terminal velocity also increases.

This means that the heavier objects (with more filters) are falling faster than the lighter objects (with fewer filters).

Choice A is not supported by the data in the table.

Terminal velocity is indeed when the force of gravity is equal to air resistance, but this definition does not provide any information about the relationship between mass and terminal velocity.

Choice B is also not supported by the data in the table.

The data does not provide any information about the time it takes for an object to reach terminal velocity.

Choice D is not supported by the data in the table.

The data shows that as the number of filters increases, the terminal velocity also increases.

This means that the greater the number of filters, the greater (not smaller) the terminal velocity.

A. Superior vena cava. B. Inferior vena cava. C. Pulmonary artery. D. Pulmonary vein.

Correct Answer is D

Explanation

The pulmonary veins are the vessels that carry oxygenated blood from the lungs to the left atrium of the heart.

Choice A is not correct because the superior vena cava carries deoxygenated blood from the upper body to the right atrium of the heart.

Choice B is not correct because the inferior vena cava carries deoxygenated blood from the lower body to the right atrium of the heart.

Choice C is not correct because the pulmonary artery carries deoxygenated blood from the right ventricle of the heart to the lungs.

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#OF FILTERS	MASS (g)	TERMINAL VELOCITY (m/s)
1	1.01	1.74
2	1.99	2.48
3	3.02	3.04
4	4.0	3.50
5	5.01	3.80

Solution in bag	Solution outside bag	Bag mass change (g):
water	Water	-0.2
20% sucrose	Water	+2.4
, 40% sucrose	Water	+4.3
, 60% sucrose	water	+5.8

Which of the following processes causes most of the carbon dioxide from the blood to move into the alveoli?

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Naxlex Comprehensive Predictor Exams

Correct Answer is C

Explanation

Which of the following vessels carries oxygenated blood?

Correct Answer is D

Explanation

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