B4.1 Flashcards
Q: What makes blood a unique tissue?
A: Based on liquid called plasma.
Q: What does plasma carry?
A:
Red blood cells
White blood cells
Platelets
Many dissolved substances
Q: How much blood does the average person have?
A: Between 4.7 - 5 litres.
Q: What is the appearance of blood plasma?
A: Yellow liquid.
Q: What is the function of blood plasma?
A: Transports all blood cells and other substances around the body.
Q: Which type of cell is the most abundant in the body?
A: Red blood cells.
Q: How many red blood cells are there in each cubic millimetre of blood?
A: 5 million.
Q: What is the primary function of red blood cells?
A: Pick up oxygen from air in lungs and carry it to cells where needed.
Q: Describe the shape of red blood cells.
A: Biconcave discs.
Q: Why are red blood cells biconcave?
A: Increased surface area to volume ratio.
Q: What protein do red blood cells contain?
A: Haemoglobin.
Q: What does haemoglobin do?
A: Binds to oxygen.
Q: Do red blood cells have a nucleus?
A: No, they do not have a nucleus.
Q: Why do red blood cells not have a nucleus?
A: More space for haemoglobin.
Q: What is the function of white blood cells?
A: Defend body against harmful microorganisms.
