U2 B4 2HVTTO

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

B4 Healthy food

• Jacket in your locker
• Put your things on your desk

       Laptop/Book

       Notebook, pencil case

• Bag on the floor
  
• Read pages 114-119

Lessongoals

• You can use the wheel of five to give advice about a healthy diet
  
• You know what a healthy weight is and what choices can help maintain it.
  
• You can name the possible causes and consequences of eating disorders and give a few examples

Homework U2 B4

Asgmt 1-9, 4c

OR challenge

Asgmt 1, 3-10, 4c

Wheel of homework

Go to Lessonup.app and use this code

Reward

Penalty

Rewards

• +1 cm2 cheatsheet = you get to make a cheatsheet for a test. This starts being 1 by 1 cm. Everytime you earn this it gets 1 cm bigger to a max of 4 by 4 cm.
• 1/3 +0.5 = If you earn this 3 times you get to add 0,5 to one of your biology marks.
• Snitch = You can pick a classmate who also is checked for homework, you earn two V's (having 3 earns you a 1/3 +0,5)
• Too bad = You only get one V
  

penalties

• 45 min extra worktime = you need to come after school and do homework, this will last for 45 min or until the task is done
• Coloringpage = You get to pick a coloringpage, You need to color it and perform tasks that might be on it. You need to hand it in during the next lesson, If you don't you get 2 marks.
• 2/1 marks = a mark is an X, if you get 3 of these you will automaticly earn the 45 min extra worktime.
• Snitch = You can pick a classmate who also is checked for homework
• Lucky! = You don't get a penalty

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

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

Someone who suffers from coeliac disease cannot tolerate gluten. Gluten is a protein that is found in grains. In someone with coeliac disease, the intestinal wall of the small intestine gets damaged by gluten (see figure)
Explain why this can also make someone with coeliac disease lose a lot of weight.

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

The same formulas can be used to convert J and Cal (instead of kJ and kCal)

!

A sandwich contains 82,6 kcal of energy.
A glass of coke contains 205 kcal of energy
How much kJ 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
• Build       of the body
• Sex
• Physical activity
• Climate/Weather

How tall, heavy and muscular you are

What is the main reason a baby doesn't need much energy?

1. His age
2. His sex
3. His physical activity
4. His build

Over/underweight

No change: Amount of cal you eat = energy requirement

Losing weight: Amount of cal you eat < energy requirementrement

A lot of this leads to > underweight

Gaining weight: Amount of cal you eat > energy requirement 

a lot of this leads to > overweight

What is a typical energy requirement?

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)​​

Age	BMI boy	BMI girl
12	15,6-21,7	15,8-21,9
13	16,3-22,6	16,4-22,6
14	16,9-23,3	17,0-23,3

These are used for adults!

Children use different values, look at the table!

You only need to learn the values for an adult

!

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?

What you should do: U2 B4

• Read pages  114-124
• Asgmt  1-9, 4c

OR challenge

• Asgmt 1, 3-10, 4c

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: U2 B4

• Read pages 114-124
• Asgmt 1-9, 4c

OR challenge

• Asgmt 1, 3-10, 4c

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

3 people each lesson

• Desks: empty and straight
• Chairs:  underneath the desks OR end of day: on the desks
• Floor: no rubbish