Topic 2: Organisation Flashcards

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1
Q

Tissue

A

A group of similar cells working together to perform a specific function.

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2
Q

Organ

A

A group of different tissues working together to perform a specific function.

Second footnote

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3
Q

Organ system

A

A group of different organs working together to perform a specific function.

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4
Q

Organism

A

A single living thing. Can be multicellular or single celled.

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5
Q

Digestion

A

The process of breaking down large insoluble food into small soluble molecules.

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6
Q

Enzyme

A

A protein and biological catalyst that speeds up rate of reaction.

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7
Q

Denatured

A

When the enzyme’s active site changes shape so much the substrate no longer binds and the enzyme stops working.

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8
Q

Amylase

A

An enzyme that breaks down starch into sugar

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9
Q

Carbohydrase

A

An enzyme that breaks down carbohydrates into sugars

Ninth footnote

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10
Q

Protease

A

An enzyme that breaks down protein into amino acids

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11
Q

Lipase

A

An enzyme that breaks down lipids (fats) into fatty acids and glycerol

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12
Q

Bile

A

An alkaline liquid, made in the liver, stored in the gall bladder. Helps digest fats by neutralising stomach acid and emulsifying fats into smaller droplets

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13
Q

Benedicts solution

A

A blue solution that turns orange/brick red when heated with sugar

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14
Q

Biurets regant

A

A blue solution that turns purple if protein is present

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15
Q

Iodine

A

An orange solution that turns blue-black if starch is present.

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16
Q

Ethanol

A

A clear solution that turns cloudy if fat is present.

Sixteenth footnote

17
Q

Arteries

A

Blood vessels that carry blood away from the heart

Example sentence: The arteries deliver oxygen-rich blood to the body.

18
Q

Veins

A

Blood vessels that carry blood into the heart

Example sentence: The veins return oxygen-poor blood back to the heart.

19
Q

Capillaries

A

Tiny blood vessels that link arteries and veins, and allow substances to diffuse in and out of the blood, into cells.

20
Q

Atrium (plural atria)

A

The top chambers of the heart

21
Q

Ventricle

A

The bottom chambers of the heart

22
Q

Valve

A

A structure which prevents backflow of blood in the heart and veins.

23
Q

Coronary heart disease

A

When the coronary artery (supplying blood to the heart) gets narrowed by fatty deposits, so less blood can flow to the heart. Less oxygen and glucose is delivered so the heart cannot respire, leading to heart attacks.

24
Q

Stent

A

A metal mesh tube placed in an artery to hold it open.

25
Q

Statins

A

A drug that reduces cholesterol and slows the build-up of fatty deposits in arteries.

26
Q

Artificial pacemaker

A

An electrical device used to correct irregular heartbeats.

27
Q

Health

A

The state of physical and mental wellbeing.

28
Q

Non communicable disease

A

A disease that cannot be passed from one person to another, not caused by pathogens.

29
Q

Cancer

A

A disease caused by mutations in DNA that leads to uncontrolled cell division.

30
Q

Malignant

A

A tumour which can spread to different parts of the body via the blood and form a secondary tumour

31
Q

Benign

A

A growth of cells contained in one area.