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3 years ago

Describe what happens to the air in the lungs when we breathe. What happens to the concentration of

1 answer:

6 0

When we breathe in, oxygen enters our lungs and enters small sacs in our lungs called the alveoli. In the alveoli, the oxygen diffuses INTO the bloodstream through small blood vessels, called capillaries, that surround these alveoli. The oxygen is now in our bloodstream instead of our lungs and is used in cell respiration etc.

Oppositely, carbon dioxide is diffused FROM the bloodstream TO the alveoli, also through these capillaries. The carbon dioxide is now in the lungs instead of the bloodstream and when you breathe out, the carbon dioxide is breathed out out of your lungs.

Hope this helped, even if it helped a tiny bit. :)

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The Atlantic ocean grows in size due to a _____. A. thrust boundary B. divergent boundary C. convergent boundary D. transform bo

miss Akunina [59]

I think the answer to this is D

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3 years ago

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In Pavlov's study, the unconditioned stimulus (UCS) was ________; the neutral stimulus was ________; and, finally, the condition

Oksana_A [137]

Answer:

In Pavlov's study, the unconditioned stimulus (UCS) was __Meat_; the neutral stimulus was ___bell__; and, finally, the conditioned stimulus (CS) was __bell__.

Explanation:

Pavlov was a physiologist and was studying the digestive system but he came up with the most valuable studies of psychology. He put the tubes in dog mouth to collect saliva and calculate the amount of saliva produced by dog in response to different stimuli.

He provided the meat to dog and dog produced saliva in response to unconditioned stimulus of meat. It was the natural reflex.
He ring the bell but there was no saliva produced by dog in response to the bell. This was called as neutral stimulus.
Then he associated the ringing of bell just before providing the meat (unconditioned stimulus). After several time the dog started to produce saliva on ringing of bell which was conditioned stimulus (CS).

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3 years ago

Is the angle of the suns rays higher in summer or the winter?

weeeeeb [17]

Answer: The rays of the summer sun, high in the sky, arrive at a steep angle and heat the land much more than those of the winter sun, which hit at a shallow angle. Although the length of the day is an important factor in explaining why summers are hot and winter cold, the angle of sunlight is probably more important.

HOPE IT HELPS YOU

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Deffense [45]

Considering the multiple choice;

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C. Differentiate non-randomly only when specific hormones are present.

D. develop receptors in a random fashion.

Answer;

A. Require the correct external signal to replace

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3 years ago

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ahrayia [7]

Each plant needs to be exposed to an equal amount of sunlight, so sunlight is the control variable

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