Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Science Book 8 > Chapter 7 > Flashcards

Chapter 7 Flashcards

You may prefer our related Brainscape-certified flashcards:
Biology 101 flashcards
1
Q

What is food?

A

Things we eat

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Why do we need food?

A

To obtain energy

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What are nutrients?

A

Substances found in food, needed to stay healthy and grow

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What energy is food?

A

Chemical energy that is transferred when eaten

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What 6 nutrients that we need on a daily basis?

A

Carbs, fats, protein, vitamins, minerals, water

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What is difference between carbs and fats? Energy wise

A

Carbs are short term energy stores. Fats are long term energy stores.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What carbs help in?

A

Provide energy using starch

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What carbs help in?

A

Provide energy using starch

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Explain starch?

A

When starch is broken down it is glucose. Glucose is fuel needed for respiration

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What is respiration?

A

Process of releasing energy

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What do fats help in?

A

Give energy and make cell membrane

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Difference between oil and fat

A

Oil is liquid. Fat is solid

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Why are obese ppl always warm?

A

Fat is stored under the skin and around some organs. This causes heat insulation

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What do proteins help in?

A

• Make new cells and repair them.
• make haemoglobin and antibodies
• provide energy if there’s lack of fat and carbs

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What is haemoglobin?

A

Pigment in red blood cells that transports oxygen

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Do we need large amounts of vitamins?

A

No

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

What does vitamin A help in? What is an example of vitamin A source?

A

•fights pathogens
•improves eyesight
Source==> carrots

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

What does vitamin C help in? What is a source for it?

A

•helps repair skin faster
•improves skin, blood, blood vessels
Sources==> oranges and lemons

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

What does vitamin C help in? What is a source for it?

A

•helps repair skin faster
•improves skin, blood, blood vessels
Sources==> lemon

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

Lack of vitamin C causes?

A

Scurvy

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

What does vitamin D help in? Source?

A

• absorbing calcium better so strong bones and teeth
Source==> oily fish and sun

22
Q

What does lack of vitamin D cause?

A

Rickets(lag in growth)

23
Q

What are 2 main minerals?

A

Calcium and iron

24
Q

Calcium helps in? Source?

A

Strong bones and teeth
Source==> almond, milk, nuts

25
Q

What iron helps in?

A

Making haemoglobin

26
Q

Lack of iron is?

A

Anemia

27
Q

Water helps in? Explain further.

A

Blood==> blood flows easily and transport substances
Cells==> break down substances in chemical reactions

28
Q

Our body weight is _% water.

A

60%

29
Q

What is diet

A

Things you eat every day

30
Q

What’s a balanced diet?

A

Diet that contains all types of nutrients and the right amount of energy

31
Q

What happens if someone has an unbalanced diet?

A

Obesity or malnutrition

32
Q

What are factors affecting energy levels

A

Age, gender, height and exercise

33
Q

What are energy levels measured in

A

Megajoules

34
Q

What nutrients do young people need? Why?

A

Protein(make cells), fat(make cell membrane), and carbs(energy)

35
Q

What do pregnant ppl need?

A

Protein(new cells), iron(haemoglobin), and calcium(strong bones)

36
Q

What happens when u eat too much sugar?

A

Teeth decay and increased risk of diabetes

37
Q

What happens when u eat too much fats?

A

Overweight and puts strain on joints and some organs

38
Q

What happens when u eat too much fat from animals

A

Heart disease

39
Q

How is fibre excreted?

A

As faeces

40
Q

What is dietary fibre?

A

Plant material that can’t be digested by human body

41
Q

What does fibre help in?

A
  1. Prevent constipation
  2. Healthy digestive system
42
Q

What does dietary fibre contain?

A

Cellulose (found in cell wall/plants)

43
Q

What is constipation

A

Condition where faeces isn’t passed or regularly due to slow digestive system

44
Q

What is growth?

A

Getting bigger

45
Q

How do cells increase in amount? Is this growth or development?

A

~single cell, divides, gets bigger, divides. This is growth

46
Q

What nutrients do we need for cells to increasein amount?

A

Protein and energy

47
Q

What is fertilisation?

A

When egg cell combines with sperms cell

48
Q

What is an example of growth?

A

A fertilised cell turning to embryo

49
Q

What is development?

A

Gradual change in body as u grow up

50
Q

What does excercise help in?

A

Using energy instead of it being stored and stronger heart/muscles

Science Book 8 (4 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions