A. concentration B. activity ==C. exhaustion D. improvement Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions fr
According to the American Red Cross, there’s a 97% chance that someone you know will need a blood transfusion. Blood donors - especially donors with certain blood types - are always in demand.
To donate blood, the American Red Cross requires that people be at least 17 years old and weigh more than 110 pounds. (In some states, the age is 16 with a parent’s permission.) Donors must be in good health and will be screened for certain medical conditions. Donors who meet these requirements can give blood every 56 days.
Blood donation starts before you walk in the door of the blood bank. Before donating, you’ll need to answer some questions about your medical history, and have your temperature, pulse, blood pressure, and blood count checked. The medical history includes questions that help blood bank staff decide if a person is healthy enough to donate blood. Donated blood gets tested for viruses, including HIV, hepatitis B, hepatitis C and West Nile virus. If any of these things are found, the blood is destroyed.
Are there any risks? A person can’t get an infection or disease from giving blood. The needles and other equipment used are sterile and they’re used only on one person and then thrown away. Sometimes people who donate blood notice a few minor side effects like nausea, lightheadedness, dizziness, or fainting, but these symptoms usually go away quickly. The donor’s body usually replaces the liquid part of blood (plasma) within 72 hours after giving blood. It generally takes about 4-8 weeks to regenerate the red blood cells lost during a blood donation. An iron-fortified diet plus daily iron tablets can help rebuild a donor’s red blood supply.
