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Unit 7 Nutrition and digestion
Unit 7 Nutrition and digestion
A guide to everything chapter 7
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Biologie
Middelbare school
vwo
Leerjaar 2
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Unit 7 Nutrition and digestion
A guide to everything chapter 7
Slide 1 - Diapositive
learning objective
You can name the functions of nutrients in foods.
You know 6 groups of nutrients with their functions and characteristics.
Slide 2 - Diapositive
Nutriens
: usable components in food
Dietary fibre
: are indigestible parts of the plants
vegetable produces
Animal products
Foodstuffs
Slide 3 - Diapositive
Function of Nutrients
Building blocks: grow/develop/repair
Fuels: by combustion in cells to provide energy
reserves: to store up
protection: to stay healty
Slide 4 - Diapositive
6 groups of nutrients
carbohydrates
fats
proteins
minerals
vitamins
Water
Slide 5 - Diapositive
Proteins
Important buildingblocks:
for example when cytoplasm is formed
as Fuel
Which foodstuffs contains proteins?
beans, yoghurt, cheese, eggs, redmeat, chicken, fish, tofu
Slide 6 - Diapositive
Food that contain a lot of protein
Slide 7 - Diapositive
Carbohydrates
includes: glucose, sugars, starch, glycogen
at first they are used as fuel
than: buildingblocks and reserves
glucose high: converted into glycogen and stored in liver and muscles.
glucose drops: glycogeen converted into glucose and released into the bloodstream
Slide 8 - Diapositive
fats
primarily used as fuel
also as buildingblock or reserves
reserves are stored beneath your skin
the subcutaneous fatlayer becomes thicker.
mostly you eat more fat than you need
Te veel vet -> slechtere werking
Slide 9 - Diapositive
Water
Your body is made up of 60% water
has a key role in transporting substances around your body
most substances can be only transported properly if they are dissolved
Slide 10 - Diapositive
Minerals (of salts)
- Buildingblocks. Like calcium for strong bones
- For protection
- not to much each day
read: '5000 deaths anually because of to much salt': page 51
Slide 11 - Diapositive
Vitamins
buildingblocks and protection
without you will become ill
consuming large quantities will make you ill as well
-A: producing skin and seeing well
-B12: Red bloodcells
-C: resistance
-D: Strong bones
Slide 12 - Diapositive
Slide 13 - Diapositive
Healty food
What is the basis for healty eating?
The basic for healty nutrition is variation
Also the food has to be safe. Not contaminated with germs.
Food poisoning: germs, bacteria, chemicals
Slide 14 - Diapositive
omega 3 for your health
containing harmful substances because of environmental pollution.
Seespiracy: 2021 netflix
Slide 15 - Diapositive
Slide 16 - Vidéo
www.bbc.com
Slide 17 - Lien
Advice for healty eating
Wheel of five: each part for daily basis
saturated fats: animal fat
unsaturated fats: fish and vegetable oil
Slide 18 - Diapositive
www.voedingscentrum.nl
Slide 19 - Lien
Slide 20 - Diapositive
homework
Make an advice for your neighbour in his or her notebook
check and correct your work 2.1 and 2.2
Make the exercises of 2.3
timer
1:00
Slide 21 - Diapositive
Slide 22 - Vidéo
the digestive system
digestive system
excists of an intestinal tract
to let nutriens be absorbed into the bloodtream
glucose, minerals, vitamines, water
proteins, carbohydrates, vets have to be digested first
digestion = converting products to be able to absorb into the bloodstream
Slide 23 - Diapositive
Slide 24 - Diapositive
The route through the digestive tract:
oral cavity tongue and salivary glands
oesophagus
stomach
duodenum gall bladder, liver and pancreas
small intestines
large intestines appendix
rectum
anus
Slide 25 - Diapositive
Slide 26 - Diapositive
Enzymes
Slide 27 - Diapositive
Peritalsis & peristaltic movement
Slide 28 - Diapositive
what to do
Take over the questions from the blackbord
Do the peanut experiment
Finish your results and the questions of the peanut experiment
Make the 'summary' and the exercises of 2.6
timer
15:00
Slide 29 - Diapositive
the digestive organs
Slide 30 - Diapositive
oral Cavity
stomach
liver, gall bladder and pancreas
small intestines
large intestines
Explain the function!
Slide 31 - Diapositive
the oral cavity, pharynx and oesophagus
what are the names of the glands together? what do they do?
salvary glands produces salvia: containing water, enzymes and mucus
Slide 32 - Diapositive
stomach
circular + longitudinal muscle for constantly movement
pyloric sphincter is a circular muscle who close off the stomach
the gastric gland produces gastric juices: containing: water, enzymes to digest proteins and hydrochloric acid to kill germs
Slide 33 - Diapositive
liver produces bile (gal)
bile is temporarily stored in the gall bladder
bile passes through the bile duct when necessary
bile emulsifies fats to make it easier for enzymes to digest.
Slide 34 - Diapositive
Slide 35 - Diapositive
The wall of the intestines contains intestinal glands. They produce intestinal juice.
various enzymes digest carbohydrates, fats and proteins
the wall is convoluted, the intestinal folds in turn have protrusions called intestinal villi.
the wall of the intestinal villi is very thin. nutrients can pass easily
Slide 36 - Diapositive
direct after the small intestines the caecum. (blinde darm).
the protrusion is called the appendix.
inflamed in appendicitis; the appendix will be surgically removed.
In the large intestine water is extracted from the pulp.
If not -> Diarrhea
Only undigested residues left over
Bacteria are able to digest some cellulose and turn is into glucose
glucose is absorbed into the bloodstream.
Slide 37 - Diapositive
Today
Finish the exercises of 2.6 and 2.8
Check and correct your work
Make the diagnostic test on page 89 -94: skip objective 6 and objective 9, 10 and 11
Do the test yourself of 2.1 - 2.2 - 2.3 - 2.4 - 2.6 - 2.8 at Malberg online.
timer
15:00
Slide 38 - Diapositive
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