Cells Flashcards

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1
Q

What is the cell membrane?

A

The cell membrane is the skin that protects the cell. It controls what can enter and leave the cell

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2
Q

What is a cytoplasm?

A

The cytoplasm is the watery substance present in all cells. All chemical reactions necessary for life take place here

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3
Q

What is the nucleus?

A

The nucleus acts as the control centre of the cell. It contains the DNA. The DNA forms a set of instructions to how the cell will work

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4
Q

What are the three structures only present in plant cells?

A

The cell wall
The chloroplast
Large vacuoles

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5
Q

What is the cell wall?

A

A cell wall is a structure only present in plant cells. It surrounds the cell and gives it shape and support

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6
Q

What is the chloroplast?

A

The chloroplast is a structure only present in plant cells. It holds the chlorophyll, the green colour that plants use to make food

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7
Q

What is the vacuole?

A

Plant cells have large vacuoles. These are the place in the cytoplasm which store things and give support.

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8
Q

On what scale does the eyepiece lens magnify the object on the light microscope?

A

Usually ✖️10

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9
Q

What is the eyepiece lens on the light microscope used for?

A

Magnifying the object

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10
Q

What is the nosepiece?

A

The nosepiece is the part of the microscope that holds the objective lens.

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11
Q

What are the objective lenses?

A

They magnify the object by ✖️4, ✖️10, ✖️40

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12
Q

What does the rough focus wheel do?

A

Brings the object into ‘rough’ focus

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13
Q

What does the fine focus wheel do?

A

Brings the object in ‘sharp’ focus

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14
Q

What is the stage on the light microscope used for?

A

Holding the slide

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15
Q

What is the mirror/light source on the microscope used for?

A

The source of light

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16
Q

Who was the inventor of the light microscope?

A

Anton van Leeuwenhock

17
Q

What is a tissue?

A

A tissue is a group of cells with the same function working together

18
Q

Give an example of a tissue?

A

A muscle

19
Q

What is an organ?

A

An organ is made of many different tissues working together

20
Q

Give an example of an organ?

A

The heart

21
Q

What is a system?

A

A system is a group of organs working together

22
Q

Give an example of a system?

A

The digestive system

23
Q

What does growth result from?

A

Cell division

24
Q

What are all living things made up of?

A

Cells

25
Q

Are organisms made up of one cell or thousands?

A

Some are made up of one(bacteria) and others are made up of thousands

26
Q

What is used to stain plant cells?

A

Iodine stain

27
Q

Are cells all the same size?

A

No! Cells differ in size, shape and function

28
Q

Name all the structures present in an animal cell?

A

1) cell membrane
2) cytoplasm
3) nucleus

29
Q

Name all the structures present in a plant cell?

A

1) cell membrane
2) cytoplasm
3) nucleus
4) cell wall
5) chloroplast
6) large vacuole

30
Q

What are the three substances present in all cells?

A

The cell membrane, the cytoplasm and the nucleus