2.1 Cells, tissues, organs and organ systems
7 exam questions worth 14 marks. Write your answer, open the mark scheme, then give yourself the marks you earned. Your answers are saved on this device.
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Which list is in order from the smallest to the largest level of organisation?
Choose one answer.
Correct Not quite: the answer is Cell, tissue, organ, organ system
Mark scheme
C
Model answer
C: cell, tissue, organ, organ system. Cells make tissues, tissues make organs and organs make organ systems.
Define the term tissue.
Mark scheme
- a group of cells (1)
- with a similar structure and function (1)
Model answer
A tissue is a group of cells with a similar structure and function.
The stomach contains muscular tissue, glandular tissue and epithelial tissue.
Explain why the stomach is described as an organ.
Mark scheme
- it is made of different / several tissues (1)
- that work together to perform a (specific) function (1)
Model answer
The stomach is made of several different tissues that work together to carry out a specific function, digesting food.
Give the function of each of these tissues in the stomach.
- Muscular tissue
- Glandular tissue
Mark scheme
- muscular: contracts to churn food / mix food with digestive juices (1)
- glandular: makes / releases digestive juices / enzymes / acid (1)
Model answer
Muscular tissue contracts to churn the food. Glandular tissue produces digestive juices containing enzymes and acid.
Which of these is a plant organ?
Choose one answer.
Correct Not quite: the answer is Leaf
Mark scheme
B: leaf
Model answer
B: the leaf. It is made of several tissues, such as epidermis, palisade mesophyll, xylem and phloem.
Name the organ system that the heart belongs to, and one other organ in the digestive system apart from the stomach.
Mark scheme
- circulatory system (1)
- any one from: small intestine / large intestine / liver / pancreas / oesophagus / mouth / salivary glands (1)
Model answer
The heart belongs to the circulatory system. The small intestine is another organ in the digestive system.
Describe how the human digestive system is organised, from cells to organ system. Use examples in your answer.
Mark scheme
- cells are specialised / e.g. muscle cells (1)
- similar cells form tissues / e.g. muscular or glandular tissue (1)
- different tissues form organs / e.g. stomach is made of muscular, glandular and epithelial tissue (1)
- organs work together in the digestive system / e.g. stomach, small intestine, liver, pancreas (1)
Model answer
Specialised cells, such as muscle cells, are grouped into tissues made of similar cells, such as muscular tissue. Different tissues, such as muscular, glandular and epithelial tissue, work together in an organ like the stomach. Several organs, including the stomach, small intestine, liver and pancreas, work together as the digestive system to break down and absorb food.
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