U2 B4 2HVTTO

• Biologie
• Middelbare school
• havo, vwo
• Leerjaar 2

What nutrient has the lowest amount of functions it can perform?

1. Fat
2. Protein
3. Vitamin
4. Water

Which of these answers show the right functions of the stomach?

1. Digesting food
2. Taking in food
3. Both answers A and B
4. Neither answers A and B

Energy in food

Food contains energy
Energy can be measured

• Joule (J)
• Calorie (cal)
• 1 cal = 4,2 J
• 1 kcal = 4,2 kJ
• ? kcal x 4,2 = ? kJ  and ? kJ/4,2 = ? kcal

A sandwich contains 20 kJ of energy.
A glass of coke contains 4000 cal of energy
How much kcal of energy is in them combined?
Use a maximum of 2 decimals (only numbers)

Energy requirement

Energy requirement = How much energy (kcal) a person needs

• Age
• Body size
• Sex
• Physical activity

BMI

Body Mass Index = BMI

• <20 = too low/underweight
• 20–25 = healthy weight
• >25 = too high/overweight
• >30 = way too high/obesity

BMI=​height​2​​(m)​​weight(kg)​​

Idris weighs 50 kg, his height is 1,30 meters.
What is his BMI?
max 2 decimals

Hans is a bodybuilder. He goes to the gym 5 times a week. He eats a lot of calories to match his energy requirement.
His height is 180 cm and he weighs 100 kg.
Explain, does Hans have a healthy weight?

Over/underweight

Healthy = Every day you eat cal according to your energy requirement

Losing weight = Every day you eat fewer cal than your energy requirement

A lot of this leads to > underweight

Gaining weight = Every day you eat more cal than your energy requirement. A lot of this leads to > overweight

What you should do:

• Read pages  114-119
• Do asgmt  1-3, 7-9, 5c, 6c, 10c pgs. 119-124

Done with the above?

• Work on the next chapter(s)
• Learn for the test 
• Make other homework
• Read a book

Zs = Working in Silence

• No asking questions
• Silent, don't disturb anyone
  
• Stay at your  desk

What you should do:

• Read pages 114-119
  
• Do asgmt 1-3, 7-9, 5c, 6c, 10c pgs. 119-124

Done with the above?

• Work on the next chapter(s)
• Learn for the test 
• Make other homework
• Read a book

Zw = Working with whispering

• Teacher is available for questions
• Only whisper with the student next to you
• Stay at your  desk

Tidy Duty

Today these people are on tidy duty

• Desks: empty and straight
• Chairs:  underneath the desks
• Floor: no rubbish