MRS C GREN + Levels of organisation Flashcards
What does M stand for in MRS C GREN?
Movement
What does R stand for in MRS C GREN?
Respiration
What does S stand for in MRS C GREN?
Sensitivity
What does C stand for in MRS C GREN?
Control
What does G stand for in MRS C GREN?
Growth
What does the second R stand for in MRS C GREN?
Reproduction
What does E stand for in MRS C GREN?
Excretion
What does N stand for in MRS C GREN?
Nutrition
What is movement?
Not staying in the same position
What is respiration?
Release of energy from food within cells
What is sensitivity?
Ability to recognise and respond to changes in the environment
What is control?
Maintain their constant internal environment (e.g. blood glucose levels/body temperature)
What is growth?
Increasing in size and mass
What is reproduction?
Producing offspring
What is excretion?
Removal of toxic metabolic waste products from cells
What is nutrition?
Either making their own food or eating microorganisms?
What are the organs of excretion?
Kidneys, skin and lungs
How do plants make their own food?
Photosynthesis
What is a unicellular organism?
An organism made up of one cell
What are the main two examples of unicellular organisms?
Bacteria and (some) fungi
What is a multicellular organism?
An organism made up of two or more cells
What are the main three examples of multicellular organisms?
Animals, plants and (most) fungi
What is the order of size from organelles to organ systems?
- Organelle
- Cell
- Tissue
- Organ
- Organ system
What is an organelle?
Tiny structure within cells
What is a cell?
The smallest unit of life
What is a tissue?
A group of similar cells working together to carry out a particular function
What is an organ?
A group of different tissues that work together to perform a function
What is an organ system?
A group of organs that work together to carry out a particular job
What is an example of an Organelle?
Nucleus/Mitochondria/
Chloroplasts/Ribosomes/
Vacuoles
What is an example of a tissue?
Xylem/Phloem
What is an example of an organ?
Liver/Lungs/Heart/
Stomach/Brain/Leaf
What is an example of an organ system?
Excretory system/Reproductive system/Immune system/Nervous system/Respiratory system/Digestive system
What is a eukaryotic cell?
A cell with a nucleus, that ahs DNA inside
What is a prokaryotic cell?
A cell with no nucleus, instead DNA is inside cytoplasm
What are some examples of a eukaryotic cell?
Animal, plant, fungi and protoctist cells
What is an example of a prokaryotic cell?
Bacteria cell
