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Transport in Humans and Plants
Quick questions on Blood and its functions explained: O-Level Biology
8short Q&A pairs drawn directly from our worked dot-point answer. For full context and worked exam questions, read the parent dot-point page.
What is the four components of blood?Show answer
Blood is a tissue made of cells suspended in a liquid:
What are red blood cells?Show answer
Red blood cells carry oxygen from the lungs to the body. They are adapted for this:
What are white blood cells?Show answer
White blood cells fight infection. There are two main kinds:
What are platelets?Show answer
Platelets are tiny cell fragments that help the blood clot. When a blood vessel is cut, platelets trigger a series of reactions that form a clot, sealing the wound to stop bleeding and to keep pathogens out.
What is plasma?Show answer
Plasma is the pale yellow liquid that carries the cells and transports many dissolved substances: digested food (glucose, amino acids), carbon dioxide, urea (a waste product), hormones, and heat around the body.
What is q1?Show answer
Name the four main components of blood. [2 marks]
What is q2?Show answer
State the function of haemoglobin. [1 mark]
What is q3?Show answer
Explain how platelets help protect the body. [2 marks]