Alarming Immunity Question Title * 1. Where is most of the immune system housed? Heart Liver Gut Lymphatic System Question Title * 2. Exercise does not affect the immune system. True False Question Title * 3. Which protects the immune system during cold weather? Bundling up Dreaming about the tropics Physical contact None of the above Question Title * 4. Social interaction is not important to immunity health. True False Question Title * 5. Which, if inadequate, can increase cancer and infection risk? Sleep Dehydration Stress Score my quiz