Extirpation of matter from left internal jugular vein, open approach

The checklist for backcountry work includes protective equipment for ____________ ____________, provisions for personal ____________ ____________, snacks, temporary ____________, ____________ lighter, and redundant ____________

Fill in the blank(s) with correct word

Which of the following statements explains why patients experiencing a moderate or severe allergic reaction have difficulty breathing?

a. Oxygen molecules are being used up by allergens. b. The brain's respiratory center is being depressed. c. The bronchioles constrict and are clogged by thick secretions. d. The workload on the heart has increased.