Body defence

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