After sitting for many hours during a trans‑Pacific flight, a passenger jumps up quickly as soon as the "fasten seat belt" light
is turned off, and immediately falls to the floor, unconscious! Within seconds of being in the horizontal position, however, consciousness is restored. Select the option that completes the explanation of what happened. Upon standing, there is a time lag before the person’s heart responds to the:
O increased downward force of the top of her head on her blood. Lying horizontally removes the downward force.
O increased pressure difference between her feet and her head. Lying horizontally reduces the pressure difference.
O reduced fluid density in her brain, which causes a lack of oxygen. Lying horizontally restores the proper fluid density.
O rush of blood and other fluids up into her head. Lying horizontally equalizes her fluid levels once again.
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
The router through which water will travel inside the root is <span>Xylem --> phloem --> endodermis --> stele --> epidermis --> cortex --> cambium. The correct option among all the options that are given in the question is the second option or option "B". I hope that this is the answer you were looking for and it has helped you.</span>
Mendel stated that each individual has two alleles for each trait, one from each parent. Thus, he formed the “first rule”, the Law of Segregation, which states individuals possess two alleles and a parent passes only one allele to his/her offspring. One allele is given by the female parent and the other is given by the male parent.
Giraffes usually only have a single baby, born after a 15-month gestation period. But because they're able to breed all year round, giraffes don't need to 'resynchronise' with the seasons each time they give birth. Sadly, about 50% of giraffe calves do not survive their first year.
