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biology paper 1 > quiz 5 > Flashcards

quiz 5 Flashcards

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1
Q

What is the function of the pulmonary artery?

A

A blood vessel that takes deoxygenated blood away from the heart

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2
Q

Give one advantage of using stents to treat coronary heart disease. (CHD)

A

stents re-open the blocked artery, restoring blood flow

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3
Q

Give one advantage of using statins to treat coronary heart disease(CHD)

A

Statins decrease blood cholesterol levels which reduces build-up of fatty deposits in the coronary arteries

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4
Q

What is the function of the vena cava?

A

A blood vessel that brings deoxygenated blood to the heart

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5
Q

Following surgery, how can patients reduce the risk of rejection of cells or organs from another human or animal?

A

Take immunosuppressant drugs

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6
Q

Which type of blood vessels(usually) carry oxygenated blood?

A

Arteries

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7
Q

What is the peacemaker of the heart?

A

A group of cells which control the rate of the heartbeat

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8
Q

What is the function of white blood cells?

A

Defend the body against micro-organisms

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9
Q

Describe the function of a capillary

A

Connect the arteries and veins together. Exchanges substances between cells and blood

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10
Q

Give one disadvantage of using bypass surgery to treat coronary heart disease(CHD)

A

Bypass surgery is major operation requiring a general anaesthetic which could cause complications.

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11
Q

How are arteries adapted to withstand high blood pressure?

A

Thick muscle walls and thick layers of elastic tissue

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12
Q

Define double circulatory system

A

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

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13
Q

Give one advanatge of using bypass surgery to treat coronary heart disease(CHD)

A

Bypass surgery reopens blocked coronary artery so blood can flow

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14
Q

What are the lower chambers of the heart called

A

ventricle

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15
Q

Give 2 adaptations of a red blood cell

A

no nucleus, biconcave shape

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16
Q

What is the function of the aorta?

A

blood vessel that takes oxygenated blood away from the heart

17
Q

Give one advantage of using biological valves

A

There is little risk of blood clots forming

18
Q

What do red blood cells contain that allows them to carry oxygen?

A

Haemoglobin

19
Q

How are capillaries adapted to exchange substances with cells?

A

They have walls which are one cell thick for a short diffusion distance( increasing the rate of diffusion)

20
Q

Describe the structure of the vein

A

Thin muscle walls, thin layers of elastic tissue, wide lumen

biology paper 1 (36 decks)

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