We have clorthing, medicine, we have insulin shots and other medical advancments animals don't have, and that help us to mantain a stability in our organism.<span>
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that there once lived humans on mars
Answer:
d. Preload increases.
Explanation:
Preload is affected by the rate of venous return and the venous blood pressure , which are affected by the volume of circulating blood and venous tone .
The preload is related to ventricular end - diastolic volume ,
The higher end - diastolic volume have a higher preload .
<u>Preload is approximated via echocardiographic measurement end diastolic volume or EDV.
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Preload is increased by exercising , or increase in blood pressure and neuroendocrine excitement .
Pretty sure it is C) Oxygen
since it is produced in photosynthesis, and consumed in respiration.
That's because it helps migrate the serves in 2 important purposes: conserve (save) energy and it is easy to keep track for the birds to fly in the group.
:) :) :)
