mcq 7 science

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Here are 10 multiple-choice questions (MCQs) with answers, based on the provided text in the image:
Question 1: Arteries carry blood from the heart to different parts of the body, and this blood is described as being:
a) Deoxygenated
b) Oxygenated
c) Carbon dioxide rich
d) Nutrient-rich
Answer: 

Question 2: What is a key difference between arteries and veins as described?
a) Arteries carry blood away from the heart, veins carry blood towards the heart.
b) Arteries are thick-walled, veins are comparatively thinner.
c) Arteries carry oxygen-rich blood (except the pulmonary artery), veins carry deoxygenated blood (except the pulmonary vein).
d) All of the above
Answer: 

Question 3: What type of blood does the pulmonary artery carry?
a) Oxygenated
b) Deoxygenated
c) Carbon dioxide rich
d) Nutrient-rich
Answer: 

Question 4: What are capillaries described as?
a) Thick-walled blood vessels
b) Thin-walled blood vessels that connect the arteries and the veins
c) Blood vessels connected only to arteries
d) Blood vessels connected only to veins
Answer

Question 5: What is the primary function of capillaries?
a) To carry blood away from the heart
b) To carry blood towards the heart
c) To allow oxygen, nutrients, carbon dioxide and waste products to diffuse to/from tissues
d) To purify the blood
Answer:

Question 6: Blood is described as:
a) A stationary fluid
b) A constantly circulating red fluid
c) A thick, viscous fluid
d) A deoxygenated fluid
Answer: 

Question 7: What is the average amount of blood in a person?
a) Approximately 3 litres
b) Approximately 5 litres or more
c) Approximately 10 litres
d) Approximately 2 litres
Answer

Question 8: Blood is made up of:
a) Only plasma and blood cells
b) Only blood cells
c) A fluid called plasma with numerous cells and proteins
d) Only water
Answer:

Question 9: What is the primary function of plasma?
a) To transport only oxygen
b) To regulate blood pressure
c) To transport substances through the blood and perform other vital functions
d) To produce blood cells
Answer: 

Question 10: What is the shape of Red Blood Cells (RBCs)?
a) Spherical
b) Disc-shaped
c) Star-shaped
d) Irregular-shaped
Answer:

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