Elizabeth is 90 years of age. compared to when she was 30 years of age, her now. cells require more energy arteries are less flexible stomach secretes more intrinsic factor skin is more elastic

The answer is ‘arteries are less flexible’. This is why the older you get the more predisposed you are to cardiovascular diseases such as high blood pressure. However, regular exercise may delay this development. The barometers in the blood vessels also become less sensitive hence these vessels become less responsive to blood pressure changes.

it would be the percentage of food eaten by the flock

i remember doing this lab

i do not know and i have a 100 in this class