Revision - Biology Flashcards
What is a microscope used for?
To make smaller objects, that are too small, look bigger. (magnifies objects).
Eg. The hairs on a flea or pollen on a flower.
The more an object is magnified, the more detail you’ll see.
Name the different parts of a microscope.
Eyepiece. Focusing knob. Height and low power objective lenses. Stage Mirror Prism ?
What is the microscope slide used for?
The slide is not part of the microscope but is used to put the object on before placing it on the stage.
Which objective lens makes things look biggest?
The short lens or the longest lens.
The longer lens.
What is the name of the thin skin around an animal cell?
Cell membrane. It holds the cell together and controls what goes in and out.
Where does aerobic respiration happen in a cell?
Mitochondria.
Respiration releases energy for the cell.
Where would you find cell sap in a plant cell?
In the vacuole.
Cell sap is a liquid containing sugar and salts.
Name the structures found in an animal call.
Name 4 structures.
An animal cell has:
A Nucleus. This controls what the cell does.
A cytoplasm. This is a sort of jelly that fills the cell. It’s where most chemical reactions happen.
A cell membrane. This is a thin skin around the cell. It holds the cell together and controls the movement of what goes in and out.
Mitochondria. These are where aerobic respiration happens, respiration releases energy for the cell.
Name the structures found in an plant call.
Name 7 structures.
Plant cells have:
A Nucleus. This controls what the cell does.
A cytoplasm. This is a sort of jelly that fills the cell. It’s where most chemical reactions happen.
A cell membrane. This is a thin skin around the cell. It holds the cell together and controls what goes in and out.
Mitochondria. These are where aerobic respiration happens, respiration releases energy for the cell.
Plus …
A cell wall. This a stiff layer around the cell membrane.
A vacuole. This is filled with cell sap. Cell sap is a liquid containing sugar and salts.
Chloroplasts. These are where photosynthesis happens. Photosynthesis makes food for plants.
Animals and plants which are made up of lots of cells is called?
Multicellular organisms.
Living things which are made up of only one cell is called?
Unicellular organisms.
What does a balanced diet consist of?
Name the 5 nutrients as well as the addition 2 sources needed.
Carbohydrates Proteins Lipids (fats and oils) Vitamins Minerals
Fibre
Water
What are carbohydrates needed in your diet for?
Give 2 examples of a carbohydrate.
You need lots of carbohydrates if you’re active or growing. Carbohydrates give you energy.
Example: bread,potatoes, steals, rice
What are proteins needed in your diet for?
Give 2 examples of a proteins.
You need proteins to grow and to repair damage.
Example: meat, fish, eggs.
What are Lipids (fats and oils)needed in your diet for?
Give 2 examples of a lipids.
You use lipids for energy if your body runs out of carbohydrates.
Example: butter, oil, cream
What are vitamins needed in your diet for?
Give 2 examples of vitamins.
Vitamins keep many important processes happening in your body.
Vitamin A helps you fight against infections and vitamin C helps wounds/cuts to heal.
Examples: vegetables, fruit and cereals.
What are minerals needed in your diet for?
Give 2 examples of a minerals.
Minerals are needed for lots of things.
Calcium is needed for strong teeth and bones and iron is needed for healthy blood.
Examples: calcium is found in milk and iron is found in meat.
What are fibres needed in your diet for?
Give 2 examples of a fibres.
Fibres help food move through your digestive system. If you don’t get enough fibre you could get constipated.
Examples. Vegetables, fruit and cereals.
What is water needed in your diet for?
Give 2 examples this.
All the chemical reactions in your body happen in water.
Examples. Drinks, watery foods like soup.
Below is a list of different foods. Which 5 foods are high in fibre.
Cheese, Breakfast cereal, Peas, Carrots, Fish, Eggs, Oats, Beef, Butter, Bananas.
Breakfast cereal Oats Peas Carrots Bananas
