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質問 English 答え English
Cell
学び始める
the smallest funcional unit of all organisms
Cell theory (3 main principles)
学び始める
1. All organisms are composed of one or more cells. 2. Cells are the smallest units of life. 3. All cells come from pre-existing cells.
7 Functions of life
学び始める
Metabolism, Response, Homeostasis, Growth, Reproduction, Excreation, Nutrition
Metabolism
学び始める
Chemical reactions that release energy for cellular use.
Growth
学び始める
An irreversible increase in size
Reproduction
学び始める
Producion of offspring (sexual or asexual)
Response
学び始める
ability to react to changes in the environment
Homeostasis
学び始める
maintaining stable internal conditions
Nutrition
学び始める
obtaining food needed for energy and growth
Excreation
学び始める
Removal of waste products of metabolism
Common features of every cell
学び始める
surrounded by a membrane, containins genetic material, conducts chemical reactions, have energy release system
Why cells can be thaught of as the smallest living structures?
学び始める
Because nothing smaller can survive
Stem Cells
学び始める
special cells that are able to develop into many different cell types
Unicellular organisms
学び始める
Single-celled and can carry out all of the functions of life independently
Multicellular organisms
学び始める
Have specialised cells to carry out specific functions
Scientific process
学び始める
Observation -> Hypothesis -> Test -> Corroborte --(Repeat)-> THEORY
What Pasteur did?
学び始める
He disproved the theory of spontaneous generation
Totipotent stem cell
学び始める
Can differentiate into any type of a cell e.g. Zygote
Pluripotent stem cell
学び始める
Can differentiate into many types of cell e.g. Induced pluripotent stem cells
Multipotent stem cells
学び始める
Can differentiate into few closely related types of cells e.g. Haematopoietic cells
Unipotent stem cells
学び始める
Can regenerate but can only differentiate into their associated cell types e.g. Skin cells

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