Chapter 18 Flashcards Preview

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Flashcards in Chapter 18 Deck (15):
1

allergens

Substances that cause an allergic reaction

2

allergic reaction

The body's exaggerated immune response to an internal or surface agent

3

anaphylaxis

An extreme, life-threatening systemic allergic reaction that may include shock and respiratory failure

4

envenomation

The act of injecting venom

5

epinephrine

A substance produced by the body (commonly called adrenaline), and a drug produced by pharmaceutical companies that increases pulse rate and blood pressure; the drug of choice for an anaphylactic reaction

6

histamines

Substances released by the immune system in allergic reactions that are responsible for many of the symptoms of anaphylaxis, such as vasodilation

7

immune response

The body's response to a substance perceived by the body as foreign

8

immune system

The body system that includes all of the structures and processes designed to mount a defense against foreign substances and disease-causing agents

9

immunology

The study of the body's immune system

10

leukotrienes

Chemical substances that contribute to anaphylaxis; released by the immune system in allergic reactions

11

stridor

A harsh, high-pitched respiratory sound, generally heard during inspiration, that is caused by partial blockage or narrowing of the upper airway

12

toxin

A poison or harmful substance

13

urticaria

Small spots of generalized itching and/or burning that appear as multiple raised areas on the skin; hives

14

wheal

A raised, swollen, well-defined area on the skin resulting from an insect bite or allergic reaction

15

wheezing

A high-pitched, whistling breath sound, usually caused by a constriction of the smaller tubes of the lungs and typically heard on expiration