B3 - Organisation and the digestive system Flashcards

1
Q

All things are made up of…

A

basic building blocks called cells

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2
Q

similar cells sometime work together to…

A

form tissues

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3
Q

tissues have

A

specific functions

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4
Q

organs are made up of

A

different types of tissue grouped together to perform specific functions

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5
Q

organs work together in

A

organ systems to perform a particular function in the body

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6
Q

organ systems work together to

A

form whole organisms

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7
Q

different types of carbohydrates include

A

simple sugars and complex carbs

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8
Q

an example of a simple sugar is

A

glucose

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9
Q

an example of a complex carb is

A

starch

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9
Q

proteins are made up of

A

long chains of amino acids

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10
Q

lipids are made up of

A

fatty acids and glycerol

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10
Q

fats and oils are

A

lipids

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11
Q

Test for sugar and colour change

A
  • Benedict’s solution
  • orginally blue
  • goes brick-red after heating if sugar is present
  • (other colours are possible depending on amount of sugar - yellow, green, orange, brown)
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12
Q

test for starch and colour change

A
  • iodine
  • orginally orange-brown
  • changes to blue-black if starch is present
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13
Q

test for protein and colour change

A
  • biuret solution
  • originally blue
  • turns purple if protein is present
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14
Q

test for lipids and colour change

A
  • ethanol (and cold water)
  • orginally clear
  • turns cloudy if lipid present
15
Q

digestive system is an

A

organ system where several organs work together to absorb and digest food

16
Q

main organs of the digestive system

A
  • mouth
  • oesophagus
  • stomach
  • liver
  • gallbladder
  • pancreas
  • small intestine
  • large intestine
17
Q

function of the mouth

A
  • Food is broken down into smaller pieces in the mouth by chewing.
  • the amylase enzyme in the saliva starts to digest starch
18
Q

function of the oesophagus

A
  • moves ingested food into the stomach
  • (by the muscles contracting)
19
Q

function of the stomach

A
  • churns the food
  • produces hydrochloric acid (pH2)
  • kills harmful microorganism
  • enzymes in the stomach work best at pH 2
  • protein digestion starts
20
Q

function of the liver

A
  • produces bile
  • bile neutralises the acidic food mixture
  • bile emulsifies fat
21
Q

Epithelial tissue

A

A tissue that lines organs

22
Q

Muscle tissue

A

A tissue that contracts to allow movement

23
Q

Glandular tissue

A

A tissue that releases useful substance eg hormones and enzymes

24
Q

Active site

A

Part of an enzyme where the substrate attaches

25
Q

Substrate

A

The reactant that attaches to the enzyme

26
Q

Denatured

A

When the active site of an enzyme has changed shape so the substrate is no longer able to attach

27
Q

Metabolism

A

The sum of all reactions on a cell or body

28
Q

Digestion

A

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

29
Q

Enzyme

A

Biological catalyst made of protein that speeds up metabolic reactions

30
Q

Emulsification

A

Large lipid droplets are made into smaller droplets which increase the surface area for lipase. The bigger the surface area the more expsoed substrate there is

31
Q

Lock and key theory

A

Describing how a substrate and enzyme connect

32
Q

Carbohydrate

A

A biological molecule that is used for energy

33
Q

Lipids

A

A biological molecule that is an efficient energy store. Also important for making cell membranes and some hormones

34
Q
A