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Science > Science Chapter 7 > Flashcards

Science Chapter 7 Flashcards

Ace Science

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1
Q

What is Vitamin A good for

A

Vitamin A is needed to help your eyes to work well, so that your vision is good. It is important for helping us to see when it is quite dark.It also helps your white blood cells to fight pathogens

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2
Q

What food contains vitamin A

A

fish,carrots,vegetables,milk and fruits

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3
Q

What is Vitamin C good for

A

helps the skin stay strong and to heal quickly if it is damaged. It keeps blood vessels and bones healthy.

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4
Q

What is scurvy

A

An illness when a person does not have enough Vitamin C. Symptoms includes feeling weak and may have swollen and bleeding gums

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5
Q

What food contains vitamin C

A

fresh fruit, vegetables, Potatoes and colourful berries

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6
Q

What is Vitamin D good for

A

strong bones and teeth, it helps the body absorb calcium from the food you consume.

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7
Q

How is Vitamin D made

A

Vitamin D is made in the skin when sunlight falls into it

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8
Q

What are the 2 important minerals

A

Calcium and Iron

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9
Q

What is Calcium good for

A

Making Bones and Teeth Strong

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10
Q

What contains calcium

A

Milk

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11
Q

What is Iron good for

A

Iron is needed to make haemoglobin

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12
Q

What happens when your body lacks iron

A

Not enough oxygen is transported around the body, illness called anaemia, makes a persson feel very tired

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13
Q

What contains Iron

A

Meat, vegetables, fish ,nuts and seeds

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14
Q

What is water good for

A

Water in cells allows all the different chemicals inside them to dissolve, so they can react together. These reactions keep us alive

Water in blood allows it to flow easily, transporting substances all over the body.

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15
Q

What is a balanced diet?

A

A diet that provides all the different kinds of nutrients and the right amount of energy

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16
Q

What nutrients do young people need?

A

Young people who are still growing need a lot of protein to make new cells, and carbohydrate to give them plenty of energy

Little bit of fat to give them energy and make the membranes on the new cells

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17
Q

What happens when you eat Fibre

A

When you eat fibre, your body does not digest it, so it just travels all the way through your digestive system and leave as faeces.

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18
Q

What is fibre good for

A

Keeping the digestive system healthy, It helps to prevent constipation

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19
Q

Which food you should not eat too much

A

Too much sugar- can make your teeth decay and increase the risk of developing diabetes

Too much fat,oil or carbohydrate-can make you put on weight.Can put strain on your joints,heart and other body organs.

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20
Q

What is an embryo

A

a little ball of cells

21
Q

Describe development in terms of human body

A

From single cell to an adult human. As the tiny embryo grows into a baby, all its different tissues and organs are formed.As the baby grows into a child, its leg muscles and bones become stronger , so that it can walk and then run. Its brain develops as it learns to talk and to play with toys

22
Q

What does nicotine do

A

Nicotine appears in tobacco, it can help someone stay alert

It damages the blood vessels in a smoker’s body, makes them get narrower and harder for blood to get through them.

23
Q

What is Tar and what does it do

A

Tar is sticky substances the appears in a tobacco. It can increase the risk of getting many different kinds of cancer, including lung cancer

24
Q

What is carbon monoxide

A

Carbon monoxide is a poisonous gas. It combines with haemoglobin inside red blood cells when it gets into the body. Which stops haemoglobin from doing it job, which is to transport oxygen.

Thus smokers do not have enough energy

25
Q

What are Particulates

A

materials in a tobacco that get trapped inside the smoker’s lungs and makes the wall of the alveoli break down.

26
Q

What is an exoskeleton

A

skeletons on outside of Insects body

27
Q

What are joints

A

Two bones that meet one another to make movement

28
Q

What are hinge joints

A

Joints that let the bones move back and forth in one direction

29
Q

Some joints let the bones move in a complete circle, at these joints, one of the bones has an end shaped like a ball. The other bone has a cup or socket that the ball fits into. What is this called?

A

ball-and-socket joints

30
Q

What are used to move bones at joints?

A

Muscles

31
Q

What does contraction mean

A

When Specialised cells that make up the muscles make themselves shorter

32
Q

Give examples of Joints

A

elbow,planar and pivot

33
Q

Give examples of hinge joints

A

Elbow,Knee

34
Q

Many of our muscles are attached to bones, these are attached by___

A

Tendons(Tough cords)

35
Q

What happens when you bend your arm at the elbow/ bending the elbow joint

A
  1. Your brain sends an electrical impulse along a neurone to your biceps muscle
  2. The cells in the biceps muscle respond to this electrical impulse by contracting,making the whole muscle get shorter and the tricep relaxes

3.When it gets shorter, they are pulled together.

36
Q

Describe the process when straightening the elbow joint

A

When triceps contracts and gets shorter, this pulls the biceps muscle straight

37
Q

Can muscles pull?

A

Yes

38
Q

can muscles push?

A

No

39
Q

What do you call two muscles that work together?

A

Antagonistic muscles

40
Q

What do antagonistic muscles do?

A

When one of them contracts, it moves the bones at a joint in one direction, when the other muscle contracts, it moves the bones in the other direction.

41
Q

Give an example of antagonistic muscles

A

Biceps muscle and triceps muscle:

To bend the arm, the biceps contracts and triceps relaxes

To straighten the arm, the triceps contracts and the biceps relax, pulling the biceps muscle

42
Q

What would happen if our body have no skeleton?

A

No support and would flop

43
Q

How many bones are there in the body

A

206

44
Q

What is the primary function of your skeletal system

A

support the shape of your body and protect your organs

45
Q

What is endoskeleton and exoskeleton

A

Endoskeleton is the skeleton inside our body and enxoskeleton is the skeleton outside our body

46
Q

What are the functions of our skeletal system

A

1) Holds the whole body together and gives it a shape

2)Skeleton protects many delicate internal organs of the body from outside damage

3)Skeleton provides numerous points for the attachments of muscles in the body

47
Q

Give an example of skeletal system and its function skeletal system also helps in the movement of body parts and locomotion

A

The cranium:
Protects the brain when heading a football

The bones store minerals like potassium which aids muscle contraction. Thus keeping the skin healthy and helps to maintain normal blood pressure

Good posture allows movements such as kicking to be efficient and prevents backache

Range of movement when kicking a ball

Some bones in the skeleton produce red blood cells which carry oxygen to the muscles during physical activity

48
Q

Can Bones bend?

A

No.

49
Q

What object is a hinge joint like?

A

Door hinge

Science (12 decks)

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