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s2008m [1.1K]
3 years ago
10

Erection of the hairs, known in humans as "goose bumps," is caused by activation of which branch of the nervous system?

Biology
1 answer:
TEA [102]3 years ago
4 0
Answer is: sympathetic
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If you fill up a balloon with a small amount of air, then set it in direct sunlight, you will see that the balloon expands. This
lakkis [162]

Answer:

Increase in kinetic energy of the gases

Explanation:

The direct sunlight will heat up the molecules making up the gases in the balloon.

Kinetic energy resulting from the heating of these particles will make them become randomized. They then begin to move more haphazardly colliding vigorously with themselves and the wall of balloon.

According to Charles's law "the volume of a fixed mass of gas is directly proportional to its temperature provided pressure remains constant" .

The sunlight heats the balloon and causes a rise in temperature. This will make the gas volume to increase and the balloon expands.

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3 years ago
Plz help I’ll make you brainliest if correct
3241004551 [841]

Answer:

it would be C, since an abiotic factor is a non-living thing that helps shape the ecosystem.

Explanation:

If you look at A it lists flowers, which are alive. If you look at B it lists bacteria, which is alive. C doesn't list anything thats alive. D lists insects, which are alive.

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TRUE OR FALSE<br> Oxygen is absorbed into the bloodstream in the trachea?
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False. Oxygen is absorbed in the alveoli sacs of the lungs.

Upon inhalation Air must first pass through the larynx and down to the trachea, which then splits off into two separate bronchial tubes, the bronchial tubes divide into smaller air passages known as the bronchi and those into even smaller bronchioles. The bronchioles end in tiny sacs called the alveoli which transfer the oxygen from the inhaled air to the bloodstream.

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Word bank: phenotype, genotype, heterozygous, homozygous, traits,
posledela

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what's this for

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List properties Shared by Metalloids and Nonmetals. Thank you!
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<span>The chemical elements</span><span> can be broadly divided into </span>metals<span>, </span>metalloids<span> and </span>nonmetals<span> according to their shared </span>physical<span> and </span>chemical properties<span>. All metals have a shiny appearance (at least when freshly polished); are good conductors of heat and electricity; form </span>alloys<span> with other metals; and have at least one </span>basic oxide<span>. Metalloids are metallic-looking brittle solids that are either </span>semiconductors<span> or exist in semiconducting forms, and have </span>amphoteric<span> or weakly </span>acidic oxides<span>. Typical nonmetals have a dull, coloured or colourless appearance; are </span>brittle<span> when solid; are poor conductors of heat and electricity; and have acidic oxides. Most or some elements in each category share a range of other properties; a few elements have properties that are either anomalous given their category, or otherwise extraordinary.</span>
8 0
2 years ago
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