Blood Vessels, Blood, Tissue Fluid, and Lymph (OCR A-Level Biology A): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
Which tissues in the tunica media allow arteries to stretch and recoil to maintain blood pressure?
Which tissues in the tunica media allow arteries to stretch and recoil to maintain blood pressure?
Elastic tissue
What is the main function of pre-capillary sphincters at arteriole-capillary junctions?
What is the main function of pre-capillary sphincters at arteriole-capillary junctions?
Regulate blood entry into capillary beds
Why are capillary walls only one cell thick?
Why are capillary walls only one cell thick?
Minimises diffusion distance for exchange
Why do veins contain valves but arteries do not?
Why do veins contain valves but arteries do not?
Veins lack pulse to push blood correctly
Which blood component contains haemoglobin and transports oxygen?
Which blood component contains haemoglobin and transports oxygen?
Red blood cells
What is the main difference between tissue fluid and blood plasma composition?
What is the main difference between tissue fluid and blood plasma composition?
Tissue fluid lacks large protein molecules
Why does lymph contain more white blood cells than tissue fluid?
Why does lymph contain more white blood cells than tissue fluid?
WBCs collect in lymph nodes during flow
At the arterial end of capillaries, why does fluid leave the blood?
At the arterial end of capillaries, why does fluid leave the blood?
High hydrostatic pressure overcomes osmosis
What percentage of fluid lost from capillaries is recovered at the venous end?
What percentage of fluid lost from capillaries is recovered at the venous end?
90%
Which structural feature differs between arteries and veins regarding the tunica media?
Which structural feature differs between arteries and veins regarding the tunica media?
Arteries have much thicker tunica media