Paper 2 · November 2018 · Cells and Tissues
What is a function of blood platelets?
ADistributing heat evenly around the body, a job carried out mainly by the blood plasma
BForming clots, which prevent bleeding and the entry of pathogens
CTransporting oxygen bound to haemoglobin, a job carried out by red blood cells, not platelets
DProducing antibodies against specific pathogens, a job carried out by lymphocytes, not platelets
Explanation
Platelets form clots, preventing bleeding and the entry of pathogens.
Derived from ZIMSEC Biology 4025/2 Paper 2 Theory, November 2018, Q3