As far as I know, the adrenal glands, when submitted under pressure such as the one described in the example, secrete a substance known as epinephrine which has the tendency of increasing the affected person's heart rate and breathing.
Answer:
![\boxed{\bf~The~answer~is~option~B.}](https://img.qammunity.org/2019/formulas/biology/middle-school/cdic1d7tqa7nmbtflur45c1f4ada64g5ag.png)
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