Unit 1- Biology- B2- [Cell specialisation]

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Why do cells specialise?

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This is the B2 of the applied science foundation diploma series of Pearson edexcel

72 Terms

1

Why do cells specialise?

So that they are tasked with different functions and roles

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2

Where are palisade mesophyll cells found?

In plant leaves

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3

What do palisade mesophyll cells contain?

Chloroplast

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4

What is the chloroplast able to do?

Absorb a large amount of light for photosynthesis

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5

What do the chloroplasts do in order to maximise the amount of light absorbed?

They move around in the cytoplasm

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6

What are palisade cells surrounded by?

A plasma membrane and a cell wall made of cellulose

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7

What does the cell wall and cell membrane do to the cell?

Helps protect the cell and keep it rigid

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8

What does feature does the pmc (palisade mesophyll cell) have to maintain turgor pressure?

It has a large centre vacuole

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9

What is the meaning of Turgor?

The rigidity of plant cells due to pressure of cell contents on the cell wall

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10
<p>What is the structure A?</p>

What is the structure A?

Cell membrane

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11
<p>What is the structure G?</p>

What is the structure G?

Cell wall

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12
<p>What is the structure D?</p>

What is the structure D?

Mitochondria

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13
<p>What is the structure F?</p>

What is the structure F?

Vacuole

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14
<p>What is the structure B?</p>

What is the structure B?

Cytoplasm

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15
<p>What is the structure E?</p>

What is the structure E?

Chloroplast

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16
<p>What is the structure C?</p>

What is the structure C?

Nucleus

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17

Where are root hair cells found?

They are found at the plants root, near the growing tip

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18

What structure does the root hair cell have?

Long hair-like extensions called root hairs.

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19

What does the root hairs enable the cell to do?

Increase surface area of the cell to maximise the movement of water and minerals from the soil into the plant root

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20

What type of walls does the root hair cell have?

Thin cellulose walls

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21

What else does the root hair cell have?

A vacuole which contains cell sap with low water potential

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22

What is the meaning of water potential?

A measure of ability of water molecules to move in a solution

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23

What does the low water potential in the vacuole encourage?

The movement of water into the cell

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24
<p>What is the structure A?</p>

What is the structure A?

Cell membrane

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25
<p>What is structure F?</p>

What is structure F?

Vacuole

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26
<p>What is structure D?</p>

What is structure D?

Cytoplasm

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27
<p>What is structure B?</p>

What is structure B?

Cell wall

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28
<p>What is structure C</p>

What is structure C

Nucleus

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29
<p>What is structure E?</p>

What is structure E?

Root hair

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30

Whare sperm cells found?

In the testes

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31

What are sperm cells?

Male gametes

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32

What is the meaning of gametes?

One set of chromosomes compared to two sets in the parent cells

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33

What is the name of the structure that enables to sperm to move?

Undulipodium or flagellum

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34

Why do sperm need a lot of mitochondria?

To supply the energy needed for the locomotion

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35

What is the head of the sperm made of ?

Acrosome

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36

What is acrosome?

A digestive enzyme which is released when the sperm meets the egg, to digest the protective layer and allow the sperm to penetrate

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37

What is the function of the sperm?

To deliver genetic information to the egg cell or ovum

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38

When the egg and sperm join together, what is the process called?

Fertilisation

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39
<p>What is structure A?</p>

What is structure A?

Head

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40
<p>What is structure H?</p>

What is structure H?

Acrosome

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41
<p>What is structure B?</p>

What is structure B?

Nucleus

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42
<p>What is structure G?</p>

What is structure G?

Neck

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43
<p>What is structure C?</p>

What is structure C?

Mitochondrion (spiral shape)

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44
<p>What is structure F?</p>

What is structure F?

Middle piece

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45
<p>What is structure D?</p>

What is structure D?

Undulipodium

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46
<p>What is structure E?</p>

What is structure E?

Plasma membrane

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47

Where is the egg cell found?

Ovaries

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48

What are egg cells?

Female gametes

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49

What is the zona pellucida?

The outer protective membrane of the egg

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50

What is attached to the the zona pellucida?

The corona radiata

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51

What is the function of the corona radiata?

To supply proteins needed by the fertilised egg cell

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52
<p>What is the name of structure A?</p>

What is the name of structure A?

Corona radiata

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53
<p>What is the name for structure D?</p>

What is the name for structure D?

Zona pelluccida

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54
<p>What is the name of structure B?</p>

What is the name of structure B?

Nucleus

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55
<p>What is the name of structure C?</p>

What is the name of structure C?

Cytoplasm

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56

Where are red blood cells found?

In the blood stream

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57

What is another name for red blood cells?

Erythrocytes

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58
<p>What type of shape is the red blood cell?</p>

What type of shape is the red blood cell?

Biconcave shape

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59

What does this shape do for the red blood cell?

Increases the surface are to volume ratio

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60

Why are red blood cells flexible?

So that they can squeeze through narrow blood capillaries

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61

What is the function of a red blood cell?

To transport oxygen around the body

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62

What feature does the red blood cell NOT have that other cell have?

It has no nucleus

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63

Why does the red blood cell not have a nucleus?

To increase the space for haemoglobin molecules inside the cell that carry oxygen

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64

What is haemoglobin?

A protein molecule in red blood cells. It carries oxygen from the lungs to to other parts of the body and carbon dioxide back to the lungs

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65

What is a Neutrophil?

A type of white blood cell

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66

What feature does a neutrophil have that enables it to squeeze through gaps when travelling to a site of infection?

Multi-lobed nuclei

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67

What does the cytoplasm contain?

Lysosomes

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68

What do lysosomes contain?

Enzymes that are used to digest pathogens

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69

What is a pathogen?

A microorganism that can cause disease

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70

What role do neutrophils have?

They have an important role in the immune system

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71
<p>What is structure A?</p>

What is structure A?

Multi-lobed nucleus

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72
<p>What is structure B?</p>

What is structure B?

Granulated cytoplasm

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