Answer:
d. All of the Earth's systems interact with each other.
Answer:
increased pressure difference between her feet and her head. Lying horizontally reduces the pressure difference.
Explanation:
The autonomic nervous system controls heart function to adapt to the effect of body positional changes. In some circumstances it takes a few seconds. So even if the passenger would have been held upright she would have recovered consciousness. The horizontal position sped up things
Probably d but definitely not A though..
Answer is D.
The ECG picks up electrical activity (action potentials) in the heart.
