Cells Flashcards
What is a nucleus?
A dense organelle present in most eukaryotic cells. The control centre of the cell.
What is a cell membrane?
Thin layer that encloses the cytosol is the cell membrane. It keeps the cell together and gives it its shape.
What is a cytoplasm?
The material within a living cell, excluding the nucleus. The jelly-like substance inside cells.
What is a cell?
Cells are the building blocks that make up all living things. The smallest structural and functional unit of an organism, which is typically microscopic and consists of cytoplasm and a nucleus enclosed in a membrane.
A chloroplast contains…..
Chlorophyll which is a green substance.
What does the vacuole do?
Is stores water and dissolved substances.
What is the difference between a unicellular and a multicellular?
Unicellular is an organism made of one cell and a multicellular is made up if more than one.
What is the difference between eukaryotic cells and prokaryotic cells?
Eukaryotic cells contain a nucleus and membrane bound organelles, while prokaryotic cells do not.
Muscle cells are…
Long and elastic. One muscle contracts while the other one relaxes.
Nerve cells are…
Very long and have a star shape at one end. They allow you to detect touch, smell, taste, sound, light and pain.
Red blood cells…
Carry oxygen around the body. They are formed in the bone marrow at the rate of 17 million cells per minute! This is why most people can donate blood to the Red Cross without any harm.
Bone cells are…
Minerals such as calcium surround your bone cells. Bone cells need to be hard so that they can keep you upright.
Egg cells are…
Some of the largest cells in a human body. They can store plenty of food because of their large round shape. Only females have egg cells. When a sperm cell moves into an egg cell, the egg cell is fertilised.
Sperm cells are…
Have long tails to help them swim towards egg cells. Only males have sperm cells.
Skin cells are…
Line the outside surface of your body. These are the cells that form your skin. These cells have a flattened shape so they can better cover and protect your body.
