Human bio exam 3

Question 1

Define immunity

Answer 1

the ability to defend the body against infection and disease

Question 2

Define lymphocytes

Answer 2

primary cells of the lymphatic system. 1. respond to invading pathogens, abnormal body cells, or foreign proteins

Question 3

lymph

Answer 3

interstitial fluid that has entered the lymphatic vessel

Question 4

lymphatic vessels (aka lymphatics)

Answer 4

begin in peripheral tissues and end at vein connections. a. carry lymph from peripheral tissues to venous system

Question 5

Lymphatic capillaries

Answer 5

have overlapping endothelia cells. allows entry of fluids and solids

Question 6

Two large vessels that receive lymph from the lymphatic trunks

Answer 6

thoracic and right lymphatic

Question 7

thoracic duct

Answer 7

75%

Question 8

right lymphatic

Answer 8

25% and drains into the right subclavian vein

Question 9

lymphedema

Answer 9

caused by blocked lymphatic drainage. fluid builds up. area becomes swollen

Question 10

three classes of lymphocytes

Answer 10

t-cells
b-cells
nk cells

Question 11

t-cells

Answer 11

cell-mediated immunity

Question 12

b-cells

Answer 12

antibody-mediated immunity

Question 13

nk cells

Answer 13

immune surveillance

Question 14

cytotoxic cells

Answer 14

attack foreign cells or body cells infected by viruses

Question 15

antigens

Answer 15

all classes of lymphoccytes are sensitive to specific chemicals

Question 16

lymphopoiesis

Answer 16

lymphocyte production