(a(i))[2]
Mosquitoes may transmit transmissible diseases such as malaria. Define the term transmissible disease.
(a(ii))[1]
Using information from Fig. 4.1, suggest how the mosquito is adapted to feed on human blood.
(b(i))[1]
The human body has several defences against disease. State the name of the mechanical barrier that the mosquito breaks through.
(b(ii))[3]
Complete Table 4.1 by adding a tick (✓) in the box that pairs each defence mechanism with the correct blood component.
(c)[2]
The body also uses chemical barriers to defend against disease. State the name of two chemical barriers in the body.