Bob has just finished donating blood at a local blood drive. donating blood took longer than he thought and he is in a hurry to meet up with some friends. as he stands up and starts to walk toward the door he begins to get dizzy, a volunteer at the blood drive catches him just as he faints. when bob awakes he is told that he fainted due to orthostatic hypotension (low blood pressure). fainting bob's body restore homeostasis by