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Queen Elizabeth's academy > Cells > Flashcards

Cells Flashcards

1
Q

What is diffusion?

A

The movement of particles from an area of high concentration to an area of low concentration

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2
Q

State three factors of diffusion

A

Temperature. Surface area. Concentration

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3
Q

Compare the speed of particles at 10 degrees and 40 degrees

A

The particles at 40 degrees will be moving a lot faster than those at 10 degrees

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4
Q

What is the function of the cytoplasm?

A

The site of chemical reactions

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5
Q

What are cells ?

A

Cells are the building blocks of life

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6
Q

How can we view cells?

A

Through a microscope

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7
Q

What is a specialised cell?

A

A cell that has been adapted to perform a specific function

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8
Q

Give 3 examples of specialised cells

A

Red blood cell. Sperm cell. Nerve cell

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9
Q

What is the function of a red blood cell?

A

Red blood cells carry oxygen around the body

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10
Q

Name an organelle in which aerobic respiration occurs

A

Aerobic respiration occurs in the mitochondria

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11
Q

What is the function of a cell wall?

A

The cell wall maintains the shape of the cell and supports it

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12
Q

What is the function of the nucleus?

A

The nucleus controls the functions of the cell and contains DNA

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13
Q

What is the function of the vacuole ?

A

The vacuole stores cell sap

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14
Q

Compare the cell wall and cell membrane

A

The cell wall is fully permeable. The cell membrane is partially permeable.

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15
Q

Define osmosis

A

Osmosis is the movement of water through a membrane

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16
Q

Give two differences between a plant and animal cell

A

Plant cell has a vacuole and cell wall

17
Q

Which objective lens should you use first when viewing a specimen through a light microscope?

A

You should always start with the lowest powered objective lens

18
Q

What is the approximate size of an animal cell in meters?

A

10-5 m

19
Q

State one adaptation of a root hair cell

A

Large surface area to volume ratio

20
Q

Give the equation linking magnification, image size and actual size

A

Image size=actual size x magnification

Queen Elizabeth's academy (5 decks)

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