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B1 Cells
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How is a root hair cell adapted to its function?
Large surface area to absorb water
How is a nerve cell adapted to its function?
long and branched to send electrical signals around the body
How is a sperm cell adapted to its function?
tail to swim, mitochondria for energy, enzymes to digest cell membrane, pointed head to penetrate egg
How is a red blood cell adapted to its function?
No nucleus and biconcave shape to provide a large surface area to carry more oxygen, thin walls for fast diffusion
Name 3 specialised cells
Red blood cell, root hair cell, sperm cell, egg cell, muscle cell
What is a specialised cell?
A cell with a particular function/role
What does the fine focus do?
Focusses the image/removes blurriness
What does the coarse focus do?
Move the stage up and down
How do we convert from cm to mm?
x10
How do we convert from um to nm?
x1000
How do we convert from mm to um?
x1000
Why do we add iodine to our onion cell?
To stain the cell and increase visibility
What is the function of the cell wall?
structure and support
What is the function of the vacuole?
contains cell sap, keeps cell turgid
What is the function of the chloroplasts?
Photosynthesis
What happens in the cytoplasm?
All the chemical reactions
What is the function of the ribosomes?
protein synthesis
What is the function of the mitochondria?
Release energy in respiration
What is the function of the cell membrane?
Controls which substances can enter and leave the cell
What is the function of the nucleus?
Contains DNA, controls the cell's activities
Which 3 structures are in a plant cell but not in an animal cell?
Cell wall, chloroplasts, vacuole
What 5 structures are in an animal cell?
Cell membrane, nucleus, cytoplasm, ribosomes, mitochondria
How many structures are in a plant cell?
8
How many structures are in an animal cell?
5
What is a eukaryote? Give an example.
A cell which contains a nucleus. e.g. animal and plant cell
What is a prokaryote? Give an example.
A cell with NO nucleus e.g. bacteria
What is a cell?
The basic building blocks of life