Unit 3 Lesson 9 (semester B)

Question 1

anaphylactic shock

Answer 1

severe allergic reaction where the amount of histamine and other inflammatory mediators released causes a life-threatening response with constricted airways and relaxed blood vessels, causing a massive drop in blood pressure.

Question 2

atrophy

Answer 2

shrink

Question 3

immunosenescence

Answer 3

the loss of immune function with aging

Question 4

involution

Answer 4

the process of shrinking an organ

Question 5

lymph

Answer 5

clear fluid that bathes body tissues

Question 6

macrophages

Answer 6

a very versatile type of phagocyte of the immune system with an irregular shape

Question 7

natural killer cells

Answer 7

a type of lymphocyte that causes the cell to cause its own death by either responding to a chemical signal or by releasing its own destructive proteins and enzymes that cause the cell to essentially eat itself.

Question 8

neutrophils

Answer 8

a type of phagocyte of the immune system that are shaped like spheres and contain mediators that are vasoactive

Question 9

phagocytosis

Answer 9

when a cell is able to engulf or surround a cell or particle to remove debris and old cells and kill pathogens

Question 10

thymus gland

Answer 10

also classified as an organ, it is considered to be the primary organ of the lymphatic system