WorksheetsBody defence
Total questions: 20
Worksheet time: 37mins
Which of these is not an external defence mechanism?
blood
ear wax
sebum
tears
What is the role of nasal mucus?
collect dead cells
lubricate the nasal passage
make phlegm
trap particles
What chemical is released when a foreign body penetrates the skin?
adrenaline
histamine
seratonin
teatree
Proteins that have a specific fit to a specific antigen are called
allergens
antibodies
antihistamines
none of these
What are made in the thymus, spleen, bone marrow and lymph nodes?
erythrocytes
histocytes
lymphocytes
platelets
B lymphocytes produce
allergens
antigens
antibodies
all of these
Which cells actually kill invading bacteria and viruses?
Antigens
B cells
T cells
thrombocytes
What do phagocytes do?
make antibodies
act as memory cells
kill pathogens indiscriminately
target specific pathogens to kill
Where do T lymphocytes usually live?
thyroid
thymus
pancreas
parathyroid
increased blood vessel diameter
vasodilation
microbial invasion
Supporting connective cells which creates new tissue to replace dead or damage cells
Tissue repair
Histamine
Phagocytes kill pathogens by
engulfing and digesting them
producing antibodies
Which white blood cell is this?
lymphocyte
phagocyte
Select all physical barriers making up 1st line of defence
phagocytes
mucous
skin
cilia
