What's covered
Cells: structure and parts12
Specialised cells and microscopy10
Tissues, organs, organ systems10
Sample questions
A taste of the 32 questions in this topic — answers marked. Sign up to practise the full set with spaced repetition.
1Cells: structure and parts
What is a cell?
- •A chemical product
- •A type of tissue
- •An organ in body
- ✓Smallest unit of life
2Specialised cells and microscopy
Why are red blood cells suited to their job?
- ✓Biconcave disc, no nucleus, packed with haemoglobin
- •Large central vacuole that holds water reserves
- •Long tail to swim through veins quickly
- •Spherical with very thick cell walls outside
3Tissues, organs, organ systems
What is a tissue?
- •A single cell with many roles
- •Group of organs in the body
- ✓Group of similar cells working together
- •Part of the cell membrane
4Cells: structure and parts
Which structure is found in plant cells but NOT animal cells?
- •Cell membrane
- ✓Chloroplast
- •Mitochondria
- •Nucleus
5Specialised cells and microscopy
Why do sperm cells have a long tail?
- •To absorb nutrients
- •To carry oxygen around
- •To divide rapidly
- ✓To swim toward the egg cell
6Tissues, organs, organ systems
What is an organ system?
- •Cells joined by chemical bonds
- •One organ with many tissues
- ✓Organs working together for one purpose
- •The body's blood supply only
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