Bioligy test Flashcards

1
Q

What are the basic building blocks for all life?

A

cells.

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2
Q

What is a tissue?

A

A group of cells with a similar structure and function.

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3
Q

A group of tissues performing a specific function.

A

Organ

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4
Q

What is a organ system?

A

Organs organised into organ systems, which work together to form organisms.

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5
Q

What does digestion convert food to?

A

small soluble molecules.

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6
Q

What produces amylase enzyme in saliva?

A

The salivary glands.

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7
Q

What is the muscular tissue in the stomach used for?

A

Churning food.

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8
Q

What does the glandular tissue in the stomach create?

A

Hydrochloric acid and protease.

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9
Q

What produces bile, and where is it stored?

A

Bile neutralises stomach acid and emulsifies fats. It’s stored in the gall bladder.

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10
Q

What enzymes do the pancreas produce?

A

protease, carbohydrates and lipase.

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11
Q

What enzymes does the small intestine produce, and what does it absorb?

A

protease, carbohydrates and lipase. It absorbs nutrients.

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12
Q

What does the large intestine absorb?

A

water.

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13
Q

What are enzymes and what are they made form?

A

Biological catalysts. They are made form protein.

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14
Q

What do enzymes have?

A

An active site that binds substrate.

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15
Q

What does the shape of the active site determine?

A

The shape of the substrate, like a lock and key.

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16
Q

What do enzymes have?

A

An optimum temperature and pH.

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17
Q

What happens if the enzyme is too high a temperature or at wrong pH?

A

Its active site changes shape and becomes denatured.

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18
Q

What carbohydrate brakes down starch into simple sugars?

A

Amylase.

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19
Q

What brakes down proteins into amino acids?

A

Proteases.

20
Q

What is the job of lipases?

A

To brake lipids (fats) down into fatty acids and glycerol.

21
Q

What is reducing sugars tested by?

A

Benedict’s test.

22
Q

What happens if the results are positive?

A

They turn brick red colour.

23
Q

How do we test for iodine?

A

Starch.

24
Q

What happens if the results are positive?

A

The results are blue-black colour.

25
Q

The Biuret test tests for what?

A

proteins.

26
Q

What happens if the results are positive?

A

They turn purple.

27
Q

Where does deoxygenated blood enter the heart?

A

Through the right atrium, through the vena cava.

28
Q

What does the right atrium do to blood?

A

It contracts pushing it to the right ventricle.

29
Q

What does the right ventricle do?

A

contracts sending blood to the lungs through the pulmonary artery.

30
Q

What does blood become in the lungs?

A

oxygenated.

31
Q

What enters the left atrium through the pulmonary vein?

A

Oxygenated blood.

32
Q

What contracts sending blood sending blood to the left ventricle?

A

The left atrium.

33
Q

What contracts sending blood to the body through the aorta?

A

The left ventricle.

34
Q

What do pacemakers do, and what can they be replaced by?

A

Pacemakers control the heart rate.They can be replaced by artificial pacemakers.

35
Q

What do valves in the heart prevent?

A

back flow of blood.

36
Q

Where does air enter the lungs?

A

Through the trachea.

37
Q

The trachea splits into two branches called what?

A

Bronchi.

38
Q

What do bronchi do?

A

Carry air to the lungs.

39
Q

Where does gas exchange happen in the lungs?

A

The alveoli.

40
Q

How does gas exchange happen?

A

Through diffusion.

41
Q

What does the alveoli have?

A

A high surface area, and a large capillary network.

42
Q

Do arteries carry blood towards or away from the heart?

A

Away.

43
Q

What do arteries have?

A

Thick walls to withstand high pressure.

44
Q

Do veins carry blood towards or away from the heart?

A

Towards.

45
Q

What do veins have?

A

Thinner walls and valves to stop back flow of blood.

46
Q

How many cells thick are capillary walls? and why?

A

One. So that exchange can happen through diffusion.