Yr7 Unit 1: Cells Flashcards

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1
Q

How do you create a slide to observe a white flower petal? (Detail)

A

You place the piece of flower, that was extracted using tweezers, and place it in the centre of the glass slide. Add a drop of dye, such as iodine, to turn the petal a more visible colour. Apply a cap.

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2
Q

How do you use a microscope? (Detail)

A

TURN LOGHT ONTO SLIDE!

1: stage to lowest point
2: slide on stage, stage clips
3: objective with lowest magnification
4: turn coarse focus until visible
5: turn fine focus until focused

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3
Q

Fill in blanks. All living things are made up of ……… .They are the smallest form, and are the ……….. blocks of life. To ……….. cells you use a ………… . This …………. the object

A
Cells.
Building.
Observe.
Microscope.
Magnify.
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4
Q

What is the calculation for total magnification?

A

Eye piece X objective lens.

10. X 20. =200

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5
Q

What is the movement of substances called?

A

Diffusion

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6
Q

How are root hair cells adapted to their function?

A

They have a large surface area, and extension to absorb nutrients and water, they don’t have any chloroplasts, as there is no light underground, so they don’t carry out photosynthesis.

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7
Q

What are nerve cells scientific name?

A

Neurone

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8
Q

How are red blood cells adapted to their function?

A

They contain a substance called haemogoblin, a red pigment that joint oxygen. They also have a large surface area, so nutrients diffuse in and out quicker. They have no nucleus

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9
Q

Whats the scientific name for a lear cell, and how is it adapted?

A

A palisade cell. It is found near the top of the leaf. It has a long thin surface area, so sunlight can diffuse easily, to many chloroplasts

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10
Q

Whats inside an animal cell?

A

Cell membrane
Mitochondrion
Nucleus
Cytoplasm

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11
Q

Whats inside a plant cell?

A
Chloroplasts
Vacuole
Cytoplasm
Nucleus
Cell membrane
Cell wall
Mitochondrion
Chloroplasts
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12
Q

What is the function of cytoplasm.

A

A jelly like substance where chemical reactions take place.

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13
Q

What is cell membrane?

A

A barrier surrounding the cell, controlling what enters and exits, such as oxygen coming in, and carbon dioxide coming out.

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14
Q

What is a nucleus?

A

It controls the cell, and contains genetic information to create new cells

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15
Q

What is a mitochondria?

A

This is where respiration happens, and energy is created

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16
Q

What is a cell wall?

A

It is made of cellulose, a tough fibre which makes the wall rigid, and acts like a skeleton

17
Q

What is a vacuole?

A

It contains a watery liquid called cell sap that keeps the cell firm

18
Q

What is a chloroplast?

A

This is where photosynthesis happens, they contain a substance called chlorophyll, which traps energy from the sun.

19
Q

Which cell contains chloroplasts? Leaf cells or root hair cells.

A

Leaf cells

20
Q

Give an example of a specialized plant cell

A

Palisade cell or root hair cell

21
Q

Give an example of a specialized animal cell

A

Nerve cell, red blood cell

22
Q

Why does a plant wilt?

A

Because the vacuole isn’t full of cell sap

23
Q

What is a unicellular organism?

A

An organism made up of one cell

24
Q

What is an amoeba?

A

It has no fixed shape, it contains a nucleus, a vacuole for food, and one for waste (contractile vacuole), cytoplasm and and cell membrane. They live in a dark environment.

25
Q

What is a euglena?

A

They contain a flagellum, eyespot, nucleus, contactile vacuole, chloroplasts, and cell wall and membrane.They live in sunny places