quiz 5 Flashcards
What is the function of the pulmonary artery?
A blood vessel that takes deoxygenated blood away from the heart
Give one advantage of using stents to treat coronary heart disease. (CHD)
stents re-open the blocked artery, restoring blood flow
Give one advantage of using statins to treat coronary heart disease(CHD)
Statins decrease blood cholesterol levels which reduces build-up of fatty deposits in the coronary arteries
What is the function of the vena cava?
A blood vessel that brings deoxygenated blood to the heart
Following surgery, how can patients reduce the risk of rejection of cells or organs from another human or animal?
Take immunosuppressant drugs
Which type of blood vessels(usually) carry oxygenated blood?
Arteries
What is the peacemaker of the heart?
A group of cells which control the rate of the heartbeat
What is the function of white blood cells?
Defend the body against micro-organisms
Describe the function of a capillary
Connect the arteries and veins together. Exchanges substances between cells and blood
Give one disadvantage of using bypass surgery to treat coronary heart disease(CHD)
Bypass surgery is major operation requiring a general anaesthetic which could cause complications.
How are arteries adapted to withstand high blood pressure?
Thick muscle walls and thick layers of elastic tissue
Define double circulatory system
A system with 2 circuits. In one cirucit, the heart pumps blood to the lungs and back, in the second circuit, the heart pumps blood to the body and back
Give one advanatge of using bypass surgery to treat coronary heart disease(CHD)
Bypass surgery reopens blocked coronary artery so blood can flow
What are the lower chambers of the heart called
ventricle
Give 2 adaptations of a red blood cell
no nucleus, biconcave shape
What is the function of the aorta?
blood vessel that takes oxygenated blood away from the heart
Give one advantage of using biological valves
There is little risk of blood clots forming
What do red blood cells contain that allows them to carry oxygen?
Haemoglobin
How are capillaries adapted to exchange substances with cells?
They have walls which are one cell thick for a short diffusion distance( increasing the rate of diffusion)
Describe the structure of the vein
Thin muscle walls, thin layers of elastic tissue, wide lumen
